Environmental microbiologist specializing in the molecular ecology of soils, potable water and municipal wastes.

• Water quality and “smart water distribution systems”
• Fate and transport of microbial pathogens in soil, air, and water
• Land application of biosolids

EDUCATION

Ph.D., Soil Microbiology, 1975,
The Ohio State University

M.S., Soil Biochemistry, 1972,
The Ohio State University

BSc, Chemistry, 1970,
University of Birmingham, Great Britain

EMPLOYMENT

2008–Present	Professor and Research Scientist, Community, Environment, and Policy, College of Public Health, The University of Arizona
2007–Present	Professor and Research Scientist, Department of Agricultural & Biosystems Engineering, The University of Arizona
2001–Present	Director, Environmental Research Laboratory, The University of Arizona
1999–Present	Director, National Science Foundation Water Quality Center, The University of Arizona.
1993–1998	Chair, Undergraduate Program in Environmental Science, Department of Soil, Water and Environmental Science, The University of Arizona.
1993–Present	Center for Toxicology, The University of Arizona.
1988–Present	Professor and Research Scientist, Departments of Soil, Water and Environmental Science, and Microbiology and Immunology, The University of Arizona.
1981–1988	Associate Professor and Associate Research Scientist, Departments of Soil and Water Science, and Microbiology, The University of Arizona.
1977–1981	Assistant Professor and Assistant Research Scientist, Department of Soil, Water and Engineering, The University of Arizona.
1975–1976	Post-Doctoral Research Associate, Washington State University.
1973–1975	Teaching Associate, The Ohio State University.
1971–1975	Research Associate, The Ohio State University.

 

PEER REVIEW PUBLICATIONS

Books

2008     Maier, R.M., I.L. Pepper, and C.P. Gerba.  A Textbook of Environmental Microbiology, 2nd Edition.  Elsevier Science, San Diego, CA. 2006     Pepper, I.L., C.P. Gerba and M.L. Brusseau.  Environmental and Pollution Science, 2nd Edition.  Elsevier Science/Academic Press.  San Diego, CA. 2004     Pepper, I.L. and C.P. Gerba.   Environmental Microbiology: A Laboratory Manual, 2nd Edition. Elsevier Science/Academic Press.  San Diego, CA.  2004     Artiola, J.F., M.L. Brusseau, and I.L. Pepper.  Environmental Monitoring and Characterization.  Academic Press.  San Diego, CA.  2000     Maier, R.M., I.L. Pepper, and C.P. Gerba.  A Textbook of Environmental Microbiology.  Academic Press. San Diego, CA. 1996     Pepper, I.L., C.P. Gerba, and M.L. Brusseau.  Pollution Science.  Academic Press.  San Diego, CA. 1995     Pepper, I.L., C.P. Gerba, and J.W. Brendecke.   Environmental Microbiology: A  Laboratory Manual.  Academic Press.  San Diego, CA.

Chapters

2008     Maier, R.M., I.L. Pepper, and C.P. Gerba.  Introduction to Environmental Microbiology.  In Environmental Microbiology, 2nd Edition.  Elsevier Science, San Diego, CA.  pp. 3–7.

2008     Roane, T.M., R.M. Maier, and I.L. Pepper.  Microorganisms.  In Environmental Microbiology, 2nd Edition.  Elsevier Science, San Diego, CA.  pp. 10–35.

2008     Maier, R.M. and I.L. Pepper.  Earth Environments.  In Environmental Microbiology, 2nd Edition.  Elsevier Science, San Diego, CA.  pp. 57–82.

2008     Pepper, I.L. and S.E. Dowd.  Aeromicrobiology.  In Environmental Microbiology, 2nd Edition.  Elsevier Science, San Diego, CA.  pp. 83–102.

2008     Pepper, I.L., C.P. Gerba, and R.M. Maier.  Environmental Sample Collection and Processing.  In Environmental Microbiology, 2nd Edition.  Elsevier Science, San Diego, CA.  pp. 137–155.

2008     Roane, T.M., I.L. Pepper, and R.M. Maier.  Microscopic Techniques.  In Environmental Microbiology, 2nd Edition.  Elsevier Science, San Diego, CA.  pp. 157–171.

2008     Gerba, C.P. and I.L. Pepper.  Cultural Methods.  In Environmental Microbiology, 2nd Edition.  Elsevier Science, San Diego, CA.  pp. 173–189.

2008     Maier, R.M. and I.L. Pepper.  Bacterial Communities in Natural Ecosystems.  In Environmental Microbiology, 2nd Edition.  Elsevier Science, San Diego, CA.  pp. 349–358.

2008     Pepper, I.L. and C.P. Gerba.  Global Change and Microbial Infectious Disease.  In Environmental Microbiology, 2nd Edition.  Elsevier Science, San Diego, CA.  pp. 359–366.

2008     Newby, D.T., I.L. Pepper, and R.M. Maier.  Microbial Transport.  In Environmental Microbiology, 2nd Edition.  Elsevier Science, San Diego, CA.  pp. 367–385.

2008     Roane, T.M., C. Rensing, I.L. Pepper, and R.M. Maier.  Microorganisms and Metal Pollutants.  In Environmental Microbiology, 2nd Edition.  Elsevier Science, San Diego, CA.  pp. 427–448.

2008     Gerba, C.P. and I.L. Pepper.  Wastewater Treatment and Biosolids Reuse.  In Environmental Microbiology, 2nd Edition.  Elsevier Science, San Diego, CA.  pp. 509–536.

2008     Gerba, C.P. and I.L. Pepper.  Domestic and Indoor Microbiology.  In Environmental Microbiology, 2nd Edition.  Elsevier Science, San Diego, CA.  pp. 561–569.

2008     Pepper, I.L., C.Y. Choi, and C.P. Gerba.  Microorganisms and Bioterrorism.  In Environmental Microbiology, 2nd Edition.  Elsevier Science, San Diego, CA.  pp. 565–574.

2007     Dowd, S.E. and I.L. Pepper.  PCR:  Agricultural and Environmental Applications for Soil Microbes.  In Manual of Environmental Microbiology, Third Edition.  C.J. Hurst, R.L. Crawford, J.L. Garland, D.A. Lipson, A.L. Mills, and L.D. Stetzenbach (eds).  ASM Press, Washington, DC.  pp. 676-686.

2006     Pepper, I.L., C.P. Gerba and M.L. Brusseau.  The Extent of Global Pollution.  In Environmental and Pollution Science, 2nd Edition.  Elsevier Science/Academic Press, San Diego, CA.  pp. 3–12.

2006     Pepper, I.L. and M.L. Brusseau.  Physical-Chemical Characteristics of Soils and the Subsurface.  In Environmental and Pollution Science, 2nd Edition.  Elsevier Science/Academic Press, San Diego, CA.  pp. 13–23.

2006     Pepper, I.L. and K.L. Josephson.  Biotic Characteristics of the Environment.  In Environmental and Pollution Science, 2nd Edition.  Elsevier Science/Academic Press, San Diego, CA.  pp. 58–77.

2006     Walworth, J. and I.L. Pepper.  Physical Contaminants.  In Environmental and Pollution Science, 2nd Edition.  Elsevier Science/Academic Press, San Diego, CA.  pp. 123–131.

2006     Gerba, C.P. and I.L. Pepper.  Microbial Contaminants.  In Environmental and Pollution Science, 2nd Edition.  Elsevier Science/Academic Press, San Diego, CA.  pp. 144–169.

2006     Glenn, E.P., J. Waugh and I.L. Pepper.  Ecosystem Restoration and Land Reclamation.  In  Environmental and Pollution Science, 2nd Edition.  Elsevier Science/Academic Press, San Diego, CA.  pp. 334–348.

2006     Gerba, C.P. and I.L. Pepper.  Municipal Wastewater Treatment.  In Environmental and Pollution Science, 2nd Edition.  Elsevier Science/Academic Press, San Diego, CA.  pp. 429–450.

2006     Pepper, I.L. and C.P. Gerba.  Land Application of Biosolids and Animal Wastes.  In Environmental and Pollution Science, 2nd Edition.  Elsevier Science/Academic Press, San Diego, CA.  pp. 451–467.

2006     Gerba, C.P., K.A. Reynolds, and I.L. Pepper.  Drinking Water Treatment and Water Security.  In Environmental and Pollution Science, 2nd Edition.  Elsevier Science/Academic Press, San Diego, CA.  pp. 468–486.

2006     Rensing, C.,G. Grass and I.L. Pepper.  Genetically Engineered Crops and Microbes. In Environmental and Pollution Science, 2nd Edition.  Elsevier Science/Academic Press, San Diego, CA.  pp. 489–498.

2006     Rensing, C. and I.L. Pepper.  Antibiotic-Resistant Bacteria and Gene Transfer.  In Environmental and Pollution Science, 2nd Edition.  Elsevier Science/Academic Press, San Diego, CA.  pp. 499–505.

2006     Arnold, R.G., D. Quanrud, C.P. Gerba and I.L. Pepper.  Pharmaceuticals and Endocrine Disruptors.  In Environmental and Pollution Science, 2nd Edition.  Elsevier Science/Academic Press, San Diego, CA.  pp. 506–515.

2006     Pepper, I.L., C.P. Gerba and M.L. Brusseau.  Epilogue: Is the Future of Pollution History?  In Environmental and Pollution Science, 2nd Edition.  Elsevier Science/Academic Press, San Diego, CA.  pp. 516–520.

2004     Artiola, J.F., I.L. Pepper, and M.L. Brusseau.  Monitoring and Characterization of the Environment.  In Environmental Monitoring and Characterization.   Elsevier Science/Academic Press, San Diego, CA.  pp. 1–9.

2004     Pepper, I.L., C. Rensing, C.P. Gerba.  Environmental Microbial Properties and Processes.  In Environmental Monitoring and Characterization.  Elsevier Science/Academic Press, San Diego, CA.  pp. 263–280.

2004     Gerba, C.P., and I.L. Pepper.  Microbial Contaminants.  In Environmental Monitoring and Characterization.  Elsevier Science/Academic Press, San Diego, CA.  pp. 313–333.

2004     Gerhart, V.J., W.J. Waugh, E.P. Glenn, and I.L. Pepper.  Ecological Restoration.  In Environmental Monitoring and Characterization.  Elsevier Science/Academic Press, San Diego, CA.  pp.  357–375.

2002     Gerba, C.P., I.L. Pepper, and L.F. Whitehead.  A Risk Assessment of Emerging Pathogens of Concern in the Land Application of Biosolids.  In Sludge Management, Regulation, Utilization and Disposal.  Wat. Sci. & Technol.  46:225–230.

2001     Gerba, C.P., K.A. Reynolds, S.E. Dowd, and I.L. Pepper.  Polymerase Chain Reaction for the Detection of Parasites and Viruses.  In Rapid Detection Assays for Food and Water. S. Clark, K.C. Thompson, C.W. Keevil, and M. Smith (eds.), The Royal Society of Chemistry, Cambridge, United Kingdom.

2001     Pepper, I.L., and S.E. Dowd.  Polymerase Chain Reaction: Applications for Plant and Soil Microbes. In  Manual of Environmental Microbiology.  2nd Edition.  C.J. Hurst, R.L. Crawford, G.R. Knudsen, M.J. McInerney, and L.D. Stetzenbach (eds.), ASM Press, Washington, DC.  pp. 573–582.

2000     Mancino, C.F., and I.L. Pepper.  Irrigation of Turf with Effluent Water.  In Plant-Environment Interactions.  2nd Edition.  F. Wilkinson (ed.), Marcel Dekker, Inc., New York, pp. 235–261.

2000     Maier, R.M., I.L. Pepper, and C.P. Gerba (eds).  Introduction to Environmental Science.  In Environmental Microbiology.  Academic Press.  San Diego, CA.  pp. 1–6.

2000     Reynolds, K.A. and I.L. Pepper.  Microorganisms in the Environment.  In Environmental Microbiology.  R.M. Maier, I.L. Pepper, and C.P. Gerba (eds), Academic Press.  San Diego, CA.  pp.  7–41.

2000     Maier, R.M. and I..L. Pepper.  Terrestrial Environments.  In Environmental Microbiology.  R.M. Maier, I.L. Pepper, and C.P. Gerba (eds), Academic Press.  San Diego, CA.  pp.  61–89.

2000     Newby, D.T., I.L. Pepper, and R.M. Maier.  Microbial Transport.  In Environmental Microbiology.  R.M. Maier, I.L. Pepper, and C.P. Gerba (eds), Academic Press.  San Diego, CA.  pp.  147–175.

2000     Pepper, I.L., C.P. Gerba, and R.M. Maier.  Environmental Sample Collection and Processing.  In Environmental Microbiology.  R.M. Maier, I.L. Pepper, and C.P. Gerba (eds), Academic Press.  San Diego, CA.  pp.  177–194.

2000     Roane, T.M., and I.L. Pepper.  Microscopic Techniques.  In Environmental Microbiology.  R.M. Maier, I.L. Pepper, and C.P. Gerba (eds), Academic Press.  San Diego, CA.  pp.  195–211.

2000     Josephson, K.L., C.P. Gerba, and I.L. Pepper.  Cultural Methods.  In Environmental Microbiology.  R.M. Maier, I.L. Pepper, and C.P. Gerba (eds), Academic Press.  San Diego, CA.  pp.  213–233.

2000     Marlowe, E.M., K.L. Josephson, and I.L. Pepper.  Nucleic Acid-Based Methods of Analysis.  In Environmental Microbiology.  R.M. Maier, I.L. Pepper, and C.P. Gerba (eds), Academic Press.  San Diego, CA.  pp.  287–318.

2000     Roane, T.M., and I.L. Pepper.  Microorganisms and Metal Pollutants.  In Environmental Microbiology.  R.M. Maier, I.L. Pepper, and C.P. Gerba (eds), Academic Press.  San Diego, CA.  pp.  403–423.

2000     Pepper, I.L.  Beneficial and Pathogenic Microbes in Agriculture.  In Environmental Microbiology.  R.M. Maier, I.L. Pepper, and C.P. Gerba (eds), Academic Press.  San Diego, CA.  pp.  425–446.

1998     Burr, M.D. and I.L. Pepper.  Characterization of Bacteria by DNA Fingerprinting.  InMicrobial Characterization of Aquifers.  S.D. Pillai (ed.), Academic Press, San Diego, CA.  pp. 79–94.

1998     Pepper, I.L. and K.L. Josephson.  Molecular Ecology of Soil.  In  Soil Microbiology:  Environmental and Agricultural Perspectives.  D. Sylvia, J. Fuhrman, D. Hartel and D. Zuberer (eds.), Marcel Dekker, New York.  pp. 168–186.

1996     Roane, T.M., I.L. Pepper and R.M. Miller.  Microbial Remediation of Metals.  In  Bioremediation:  Principles and Applications.  R.L. Crawford and D.L. Crawford (eds.), Cambridge University Press, United Kingdom.  pp. 312–340.

1996     Pepper, I.L.  The Interdisciplinary Role of Soil Science within the University Environmental Science Arena.  In  The Role of Soil Science in Interdisciplinary Research.  R.J. Wagonet and J. Bourma (eds.), SSSA Special Publications, Madison, Wisconsin.  pp 75–87.

1996     Pepper, I.L., T.M. Straub, and C.P. Gerba.  Detection of Microorganisms in Soils and Sludges.  In  Nucleic Acid Amplification Methods for the Analysis of Environmental Samples.  G.A. Toranzos (ed.)  Technomic Publ. Lancaster, PA.  pp 95–111.

1996     Pepper, I.L.  Polymerase Chain Reaction:  Applications for Plant and Soil Microbes.  In  Manual of Environmental Microbiology.  L. Stetzanbach and M. McInerney (eds.), ASM Press, Washington, DC.  pp 437–444.

1996     Pepper, I.L., C.P. Gerba and M.L. Brusseau.  Pollution in the Twenty First Century.  In  Pollution Science.  I.L. Pepper, C.P. Gerba and M.L. Brusseau (eds.), Academic Press, San Diego, CA  pp 371–376.

1996     Pepper, I.L. and K.L. Josephson.  Biotic Activity in Soil and Water.  In  Pollution Science.  I.L. Pepper, C.P. Gerba and M.L. Brusseau (eds.), Academic Press, San Diego, CA  pp 31–44.

1996     Pepper, I.L.  Abiotic Characteristics of Soil.  In  Pollution Science. I.L. Pepper, C.P. Gerba and M.L. Brusseau (eds.), Academic Press, San Diego, CA  pp 9–18.

1996     Brendecke, J.W. and I.L. Pepper.  The Extent of Global Pollution.  In  Pollution Science.  I.L. Pepper, C.P. Gerba and M.L. Brusseau (eds.), Academic Press, San Diego, CA  pp 3–8.

1995     Pepper, I.L. and S.D. Pillai.  PCR Amplification of DNA from Root Nodules.  In  Nucleic Acids in the Environment.  J.D. Van Elsas and J.T. Trevors (eds.), Marcel Dekker, Inc.  pp 142–151.

1994     Pepper, I.L. Plasmid Profiles.  In  Methods of Soil Analysis, Part 2—Microbiological and Biochemical Properties.  ASA, CSSA, SSSA, Madison, WI., pp 635–645.

1994     Pepper, I.L. and S.D. Pillai.  Detection of Specific DNA Sequences in Environmental Samples via Polymerase Chain Reaction.  In  Methods of Soil Analysis, Part 2—Microbiological and Biochemical Properties.  ASA, CSSA, SSSA, Madison, WI., pp 707–726.

1993     Pepper, I.L. and C.F. Mancino.  Irrigation of Turfgrass with Effluent Water.  In  Handbook of Crop Stress.  M. Pessarakli. (ed.), Marcel Dekker, Inc., N.Y., N.Y.  pp 623–642.

1991     Pepper, I.L.  Physiological Adaptation of Rhizobia to Improve Nitrogen Fixation in Desert Environments.  In  Desert Development Part 1:  Desert Agriculture, Ecology and Biology.  A. Bishay and H. Dregne (eds.), Harwood Academic Publishers, New York, NY, pp. 293–305.

1991     Pepper, I.L. and R.P. Upchurch.  Nitrogen Fixation by Desert Legumes Associated with Rhizobia.  In  Semiarid Lands and Deserts:  Soil Resource and Reclamation.  J. Skujins (ed.), Marcel Dekker, Inc., NY, NY, pp. 443–467.

1991     Shishido, M. and I.L. Pepper.  Evaluation of Rhizobium meliloti Strains Indigenous to Sonoran Desert Soils by Plasmid Profile and Intrinsic Antibiotic Resistance.  In  The Rhizosphere and Plant Growth.  D.L. Keister and P.B. Cregarn Kluwer (eds.), Academic Publishers, Boston, MA.  pp 189.

1990     Pepper, I.L. and D.F. Bezdicek.  Root Microbial Interactions and Rhizosphere Nutrient Dynamics.  In  Crops as Enhancers of Nutrient Use.  V.C. Baligar and R.R. Duncan (eds.),  Academic Press, Inc.  pp 375–410.

Refereed Journal Articles

2009       Scott, E.A. and I.L. Pepper. Microbial Community Analysis of Drinking Water from Four U.S. Cities:  Impact on Taste and Odor.  Wat. Sci. Technol.  In Review.

2009     Pepper, I.L., D.T. Newby, C.P. Gerba and C.R. Rice.  Soil as a Public Health Threat or Savior.  Crit. Rev. Environ. Sci. Technol.  In Press.

2009     Miles, S.L., K.A. Reynolds, C.P. Gerba, and I.L. Pepper.  Point-of-Use Drinking Water Devices for Assessing Microbial Contamination in Finished Water and Distribution Systems.  Environ. Sci. & Technol.  43:1425−1429.

2009     Gundy, P.M., C.P. Gerba, and I.L. Pepper.  Survival of Coronaviruses in Water and Wastewater.  Food Environ. Virol.  1:10−14.

2009     Rodriguez, R.A., I.L. Pepper, and C.P. Gerba.  Application of PCR-Based Methods to Assess the Infectivity of Enteric Viruses in Environmental Samples.  Appl Environ. Microbiol  75:297–307.

2008     Tanner, B.D., J.P. Brooks, C.P. Gerba, C.N. Haas, K.L. Josephson, and I.L. Pepper.  Estimated Occupational Risk from Bioaerosols Generated During Land Application of Class B Biosolids.  J. Environ. Qual.  37:2311–2321.

2008     Pepper, I.L., H. Zerzghi, J.P. Brooks and C.P. Gerba.  Sustainability of Land Application of Class B Biosolids.  J. Environ. Qual.  37:58-67.

2008     Gerba, C.P., N. Castro-del Campo, J.P. Brooks, and I.L. Pepper.  Exposure and Risk Assessment of Salmonella in Recycled Residuals.  Water Sci. Technol.  57:1061–1065.

2007     Brooks, J.P., C.P. Gerba, and I.L. Pepper.  Diversity of aerosolized bacteria during land application of biosolids.  J. Appl. Microbiol.  103:1779–1790.

2007     Brooks, J.P., S.L. Maxwell, C. Rensing, C.P. Gerba, and I.L. Pepper.  Occurrence of antibiotic-resistant bacteria and endotoxin associated with the land application of biosolids.  Can. J. Microbiol.  53:616–622.

2007     Castro-del Campo, N., I.L. Pepper, and C.P. Gerba.  2007.  Assessment of Salmonella typhimurium Growth in Class A Biosolids and Soil/Biosolid Mixtures.  J. Res Sci & Technol.  4:83–88.

2007     Cheng, L., A.S. Chetochine, I.L. Pepper, and M.L. Brusseau.  2007.  Influence of DOC on MS-2 bacteriophage transport in a sandy soil.  Water Air Soil Pollution 178:315–322.

2006     Pepper, I.L., J.P. Brooks, and C.P. Gerba.  Pathogens in Biosolids.  In Advances in Agronomy.  D.L. Sparks (ed.) Elsevier Science/Academic Press, San Diego, CA.  pp. 1–41.

2006     Fairley, D.J., G. Wang, C. Rensing, I.L. Pepper, and M.J. Larkin.  Expression of Gentisate 1,2-dioxygenase (gdoA) Genes Involved in Aromatic Degradation in Two Haloarchaeal Genera.  Appl. Microbiol. Biotechnol.  73:691–695.

2006     Fan, H., D.J. Fairley, C. Rensing, I.L. Pepper, and G. Wang.  Identification of similar non-thermophilic Crenarchaeota in four Chinese and American pristine soils.  Biodiversity Sciences 14:181–187.

2006     Krutz, L.J., T.J. Gentry, S.A. Senseman, I.L. Pepper, and D.P. Tierney.  Mineralization of Atrazine, Metolachlor and their Respective Metabolites in Vegetated Filter Strip and Cultivated Soil.  Pest Manag Science  62:505–514.

2006     Brooks, J.P., B.D. Tanner, C.P. Gerba, and I.L. Pepper.  The Measurement of Aerosolized Endotoxin from Land Application of Class B Biosolids in Southeast Arizona.  Can. J. Microbiol.  52:150–156.

2006     Chetochine, A., M.L. Brusseau, C.P. Gerba, and I.L. Pepper.  Leaching of Phage from Class B Biosolids and Potential Transport Through Soil.  Appl. Environ. Microbiol.  72:665–671.

2005     Choi, C.Y., M. Grabau, S.A. O’Shaughnessy, and I.L. Pepper.  Pathogen Reduction in Biosolids for Land Application.  J. Residuals Sci. Technol.  2:159–171.

2005a   Zaleski, K.J., K.L. Josephson, C.P. Gerba, and I.L. Pepper.  Potential Regrowth and Recolonization of Salmonella and Indicators in Biosolids and Biosolid Amended Soil.  Appl. Environ. Microbiol.  71:3701–3708.

2005b   Zaleski, K.J., K.L. Josephson, C.P. Gerba, and I.L. Pepper.  Survival, Growth, and Regrowth of Enteric Indicator and Pathogenic Bacteria in Biosolids, Compost, Soil, and Land Applied Biosolids.  J. Residuals Sci. Technol.  2:49–63.

2005     Tanner, B.D., J.P. Brooks, C.N. Haas, C.P. Gerba, and I.L. Pepper.  Bioaerosol Emission Rate and Plume Characteristics During Land Application of Liquid Class B Biosolids.  Environ Sci & Technol 39:1584–1590.

2005a   Brooks, J.P., B.D. Tanner, C.P. Gerba, C.N. Haas, and I.L. Pepper.  Estimation of Bioaerosol Risk of Infection to Residents Adjacent to a Land Applied Biosolids Site Using an Empirically Derived Transport Model.  J. Appl. Microbiol.  98:397–405.

2005b   Brooks, J.P., B.D. Tanner, K.L. Josephson, C.N. Haas, C.P. Gerba, and I.L. Pepper.  A National Study on the Residential Impact of Biological Aerosols from the Land Application of Biosolids.  J. Appl. Microbiol.  99:310–322.

2005     Stine, S.W., F.D. Vladich, I.L. Pepper, and C.P. Gerba.  Development of a Method for the Concentration and Recovery of Microsporidia from Tap Water.  J Environ Sci and Hlth Part A—Toxic/Hazardous Substances and Environmental Engineering 40:3–13.

2005     Stine, S.W., I.L. Pepper, and C.P. Gerba.  Contribution of Drinking Water to the Weekly Intake of Heterotrophic Bacteria from Diet in the United States.  Wat. Res.  39:257–263.

2004     Gentry, T.J., G. Wang, C. Rensing, and I.L. Pepper.  Chlorobenzoate-Degrading Bacteria in Similar Pristine Soils Exhibit Different Community Structures and Population Dynamics in Response to Anthropogenic 2-, 3-, and 4-Chlorobenzoate Levels.  Microb. Ecol.  48:90–102.

2004     Brooks, J.P., B.D. Tanner, K.L. Josephson, C.P. Gerba, and I.L. Pepper.  Bioaerosols from the Land Application of Biosolids in the Desert Southwest.  Wat Sci. Technol.  50:7–12.

2004     Wang, G., T.J. Gentry, G. Grass, K. Josephson, C. Rensing, and I. Pepper.  Real-time PCR Quantification of a GFP-labeled, Genetically Engineered Pseudomonas putida Strain during 2-Chlorobenzoate Degradation in Soil.    FEMS Microbiol. Lett.  233:307–314. 

2004     Gentry, T.J., C. Rensing, and I.L. Pepper.  New Approaches for Bioaugmentation as a Remediation Technology.  Crit. Rev. Env. Sci. Tech.  34:447–494.

2004     Pepper, I.L., P. Rusin, D.R. Quintanar, C. Haney, K.L. Josephson, and C.P. Gerba.  Tracking the Concentration of HPC Bacteria from the Source to the Consumer’s Tap.  Int’l. J. Food Microbiol.  92(3)265–271.

2004     Gentry, T.J., K.L. Josephson, and I.L. Pepper.  Functional Establishment of Introduced Chlorobenzoate Degraders Following Bioaugmentation with Newly Activated Soil.  Biodegradation.  15:67–75.

2004     Brooks, J.P., C.P. Gerba, and I.L. Pepper.  Bioaerosol Emission, Fate, and Transport from Municipal and Animal Wastes.  J. Residuals Sci. Technol.  1:13–25.

2003     Rusin, P., S. Maxwell, J. Brooks, C. Gerba, and I. Pepper.  Evidence for the Absence of Staphylococcus aureus in Land Applied Biosolids.  Environ. Sci. Technol. 37:4027–4030.

2003     Rusin, P., S. Maxwell, J. Brooks, C. Gerba, and I. Pepper.  Response to comment on “Evidence for the Absence of Staphylococcus aureus in Land Applied Biosolids.”  Environ Sci. Technol.  37:5836–5836.

2003     Dowd, S.E., D. John, J. Eliopolus, C.P. Gerba, J. Naranjo, R. Klein, B. Lopez, M. de Mejia, C.E. Mendoza, and I.L. Pepper.  Confirmed Detection of Cyclospora cayetanesis, Encephalitozoon intestinalis and Cryptosporidium parvum in Water Used for Drinking.  J. Wat. Hlth.  1:117–123.

2003     John, D.E., N. Nwachuku, I.L. Pepper, and C.P. Gerba.  Development and Optimization of a Quantitative Cell Culture Infectivity Assay for the Microsporidium Encephalitozoon intestinalis and Application to Ultraviolet Light Inactivation.  J. Microbiol. Methods 52:183–196.

2002     Pepper, I.L., T.J. Gentry, D.T. Newby, T.M. Roane, and K.L. Josephson.  The Role of C ell Bioaugmentation and Gene Bioaugmentation in the Remediation of Co-Contaminated Soils.  Environ. Health Perspect.  110:943–946.

2002     Gentry, T.J. and I.L. Pepper.  Incidence of Bacillus anthracis in Soil.  Soil Science 167:627–635.

2002     Gerba, C.P., I.L. Pepper, and L.F. Whitehead, III.  A Risk Assessment of Emerging Pathogens of Concerns in the Land Application of Biosolids.  Wat. Sci. Technol.  46:225–230.

2002     Newby, D.T., and I.L. Pepper. Dispersal of Plasmid pJP4 in Unsaturated and Saturated 2,4-Dichlorophenoxyacetic Acid Contaminated Soil.  FEMS Microbiol. Ecol.  39:157–164.

2002     Rensing, C., D.T. Newby, and I.L. Pepper.  The Role of Selective Pressure and Selfish DNA in Horizontal Gene Transfer and Soil Microbial Community Adaptation.  Soil Biol. Biochem.  34:285–296.

2002     Thurston, J.A., P. Watt, S.E. Dowd, R. Enriquez, I.L. Pepper, and C.P. Gerba.  Detection of Protozoan Parasites and Microsporidium in Irrigation Waters Used for Crop Production.  J. Food Prot.  65:378–382.

2002     Gentry, T.J., D.T. Newby, K.L. Josephson, and I.L. Pepper.  2001.  Soil Microbial Population Dynamics Following Bioaugmentation with a 3-Chlorobenzoate-Degrading Bacterial Culture.  Biodegradation.  12:349–357.

2002     Marlowe, E.M., J-M. Wang, I.L. Pepper, and R.M. Maier.  Application of a Reverse Transcriptase-PCR Assay to Monitor Regulation of the Catabolic nahAc Gene During Phenanthrene Degradation.  Biodegradation.  13:251–260.

2001     Roane, T.M., K.L. Josephson, and I.L. Pepper.  Dual-Bioaugmentation Strategy to Enhance Remediation of Co-Contaminated Soil.  Appl. Environ. Microbiol.  67:3208–3215.

2001     Reynolds, K.A., C.P. Gerba, M. Abbaszadegan, and I.L. Pepper.  ICC/PCR Detection of Enteroviruses and Hepatitis A Virus in Environmental Samples.  Can. J. Microbiol.  47:153–157.

2000     Pepper, I.L.  New Opportunities for Soil Scientists in the Environmental Science Arena.  Soil Sci.  165:41–46.

2000     Roane, T.M., and I.L. Pepper.  Microbial Responses to Environmentally Toxic Cadmium.  Microb. Ecol.  38:358–364.

2000     Blackmer, F, K.A. Reynolds, C.P. Gerba, and I.L. Pepper.  Use of Integrated Cell Culture-PCR to Evaluate the Effectiveness of Poliovirus Inactivation by Chlorine.  Appl. Environ. Microbiol.  66:2267–2268.

2000     Newby, D.T., T.J. Gentry, and I.L. Pepper.  Comparison of 2,4-Dichlorophenoxyacetic Acid Degradation and Plasmid Transfer in Soil Resulting from Bioaugmentation with Two Different pJP4 Donors.  Appl. Environ. Microbiol.  66:3397–3407.

2000     Newby, D.T., K.L. Josephson, and I.L. Pepper.  Detection and Characterization of Plasmid pJP4 Transfer to Indigenous Soil Bacteria.  Appl. Environ. Microbiol.  66:290–296.

2000     Dowd, S.E., C.P. Gerba, I.L. Pepper, and S.D. Pillai.  Bioaerosol Transport Modeling and Risk Assessment in Relation to Land Placement of Biosolids.  J. Environ. Qual.  29:343–348.

1999     Dowd, S.E., C.P. Gerba, and I.L. Pepper.  Methods for the Detection of Microsporidia in Water.  J. Microbiol. Methods.  35:43–52.

1998     Burr, M.D., K.L. Josephson and I.L. Pepper.  Evaluation of DNA Fingerprinting Methods for Discriminating Salmonella Serotypes.  Let. Appl. Microbiol.  27:24–30.

1998     Reynolds, K.A., K. Roll, R.S. Fujioka, C.P. Gerba and I.L. Pepper.  Comparative Detection of Enteroviruses in Marine Waters by Cell Culture and RT-PCR.  Appl. Environ. Microbiol.  Can. J. Microbiol.  44:598–604.

1998     Jutras, E.M., C.M. Smart, R. Rupert, I.L. Pepper and R.M. Miller.  Field Scale Biofiltration of Gasoline Vapors Extracted from Beneath a Leaking Underground Storage Tank.  Biodegradation.  8:31–42.

1998     Dowd, S.E., Gerba, C.P., Pepper, I.L.  Conformation of the Human-Pathogenic Microsporidia Enterocytozoon bieneusi, Encephalitozoon intestinalis, Vittaforma corneae in water. Appl. Environ. Microbiol.  64:3332–3335.

1998     Burr, M.D. and I.L. Pepper.  A Review of DNA Fingerprinting Methods for Subtyping Salmonella.  Crit. Rev. Environ. Sci. Technol.  28:283–323.

1998     Dowd, S.E., C.P. Gerba, F.J. Enriquez, and I.L. Pepper.  PCR Amplification and Species Determination of Microsporidia in Formalin Fixed Feces After Imunomagnetic Separation.  Appl. Environ. Microbiol.  64:333–336.

1998     Josephson, K.L., J.R. Rubino and I.L. Pepper.  Characterization and Quantification of Bacterial Pathogens and Indicator Organisms in Household Kitchens With and Without the Use of a Disinfectant Cleaner.  J. Appl. Microbiol.  83:737–750.

1997     Johnson, D.C., C.E. Enriquez, I.L. Pepper, T.L. Davis, C.P. Gerba, and J.B. Rose.  Survival of Giardia, Cryptosporidium, Poliovirus and Salmonella in Marine Waters.  Water Sci. Technol.  35:261–268.

1997     Reynolds, K.A., C.P. Gerba, and I.L. Pepper.  Rapid PCR Based Monitoring of Infectious Enteroviruses in Drinking Water.  Wat. Sci. Tech.  35:11–12.

1997     Burr, M.D. and I.L. Pepper.  Variability in Presence-Absence Scoring of AP-PCR Fingerprints Affects Computer Matching of Bacterial Isolates.  J. Microbiol. Methods.  29:63–68.

1997     Day, W.A., I.L. Pepper and L.A. Joens.  Use of an Arbitrarily Primed PCR Product in the Development of a Campylobacter jejuni - Specific PCR.  Appl. Environ. Microbiol.  63:1019–1023.

1997     Marlowe, E.M., K.L. Josephson, R.M. Miller, and I.L. Pepper.  A Method for the Detection and Quantitation of PCR Template in Environmental Samples by High Performance Liquid Chromatography.  J. Microbiol. Methods.  28:45–53.

1997     Abbaszadegan, M., M.S. Huber, C.P.Gerba and I.L. Pepper.  Detection of Viable Giardia Cysts by Amplification of Heat Shock-Induced mRNA.  Appl. Environ. Microbiol.  63:324–328.

1996     DiGiovanni, G.D., J.W. Neilson, I.L. Pepper and N.A. Sinclair.  Gene Transfer of Alcaligenes eutrophus JMP134 Plasmid pJP4 to Indigenous Soil Recipients.  Appl. Environ. Microbiol.  62:2521–2526.

1996     Reynolds, K.A., C.P. Gerba, and I.L. Pepper.  Detection of Infectious Enteroviruses Using Cell Culture/PCR Procedure.  Appl. Environ. Microbiol.  62:1424–1427.

1996     DiGiovanni, G.D., I.L. Pepper, and N.A. Sinclair.  Plasmid Diversity within a 2,4-D Acid Degrading Variovorax Paradoxus Population Isolated from a Contaminated Soil.  J. Environ. Sci. Health.  A31:963–976.

1995     Jutras, E.M., R.M. Miller, and I.L. Pepper.  Optimization of AP PCR for Identification of Bacterial Isolates.  J. Microbiol. Methods.  24:55–63.

1995     Ju Fang Ma, C.P. Gerba and I.L. Pepper.  Increased Sensitivity of Poliovirus Detection in Tap Water Concentrates by RT PCR.  J. Vir. Methods.  55:295–302.

1995     Straub, T.M., I.L. Pepper and C.P. Gerba.  Comparison of PCR and Cell Culture Detection of Enteroviruses in Sludge Amended Field Soils and Determination of their Transport.  Appl. Environ. Microbiol.  61:2066–2068.

1995     Johnson, D.C., C.P. Gerba, I.L. Pepper, and J.B. Rose.  Detection of Giardia and Cryptosporidium in Marine Waters.  Wat. Sci. Tech.  31:439–442.

1995     Reynolds, K.A., C.P. Gerba, and I.L. Pepper.  Detection of Enteroviruses in Marine Waters by Direct RT-PCR and Cell Culture.  Wat. Sci. Tech.  31:323–328.

1995     Straub, T.M., I.L. Pepper and C.P. Gerba.  Removal of PCR Inhibiting Substances in Sewage Sludge Amended Soil.  Wat. Sci. Tech.  31:311–315.

1994     Straub, T.M., I.L. Pepper and C.P. Gerba.  Detection of Naturally Occurring Enteroviruses and Hepatitis A Virus in Undigested and Anaerobically Digested Sludge Using the Polymerase Chain Reaction.  Can. J. Microbiol.  40:884–888.

1994     Soares, A.C., T.M. Straub, I.L. Pepper, and C.P. Gerba.  Effect of Anaerobic Digestion on the Occurrence of Enteroviruses and Giardia Cysts in Sewage Sludge.  J. Environ. Sci. Health  A29:1887–1897.

1994     Neilson, J.W., K. L. Josephson, I.L. Pepper, R.B. Arnold, G.D. DiGiovanni, and N.A. Sinclair.  Frequency of Horizontal Gene Transfer of a Large Catabolic Plasmid (pJP4) in Soil.  Appl. Environ. Microbiol.  60:4053–4058.

1994     Yu-Fang, Ma., T.M. Straub, I.L. Pepper, and C.P. Gerba.  Cell Culture and PCR Determination of Poliovirus Inactivation by Disinfectants.  Appl. Environ. Microbiol.  60:4203–4206.

1994     Pillai, S.D., K.L. Josephson, and I.L. Pepper.  Comparison of Three Probe Labelling Methods to Detect PCR Amplification Products.  J. Rapid Methods Autom. Microbiol.  2:299–309.

1994     Straub, T.M., I.L. Pepper, M. Abbaszadegan, and C.P. Gerba.  A Method to Detect Enteroviruses in Sewage Sludge-Amended Soil Using the PCR.  Appl. Environ. Microbiol.  60:1014–1017.

1994     Pepper, I.L., K.L. Josephson, R.L. Bailey, M.D. Burr, S.D. Pillai, D. Tolliver, and S. Pulido.  A Rapid and Systematic Analytical Method for Measuring Bacterial Contaminants in Ultrapure Water.  Microcontamination.  12:52–57.

1993     Josephson, K.L., C.P. Gerba and I.L. Pepper.  PCR Detection of Nonviable Bacterial Pathogens.  Appl. Environ. Microbiol.  59:3513–3515.

1993     Pepper, I.L., K.L. Josephson, R.L. Bailey and C.P. Gerba.  Survival of Indicator Organisms in Sonoran Desert Soil Amended with Sewage Sludge.  J. Environ. Sci. Health.  A28:1287–1302.

1993     Estrella, R., M.L. Brusseau, I.L. Pepper, P.J. Wierenga, and R.M. Miller.  Biodegradation, Sorption and Transport of 2,4-D In a Saturated and Unsaturated Soil.  Appl. Environ. Microbiol.  59:4266–4273.

1993     Brendecke, J.W., R.D. Axelson, and I.L. Pepper.  Soil Microbial Activity s an Indicator of Soil Fertility:  Long Term Effects of Municipal Sewage Sludge on an Arid Soil.  Soil Biol. Biochem.  25:751–758.

1993     Way, J., K.L. Josephson, S.D. Pillai, M. Abbaszadegan, C.P. Gerba and I.L. Pepper.  Specific Detection of Salmonella by Multiplex Polymerase Chain Reaction.  Appl. Environ. Microbiol.  59:1473–1479.

1993     Straub, T.M., Pepper, I.L. and Gerba, C.P.  Hazards from Pathogenic Microorganisms in Land-Disposed Sewage Sludge.  Rev. Environ. Contam. Toxicol.  132:55–91.

1993     Abbaszadegan, M., C.P. Gerba, M.S. Huber and I.L. Pepper. Detection of Enteroviruses in Groundwater Using Polymerase Chain Reaction.  Appl. Environ. Microbiol.  59:1318–1324.

1993     Straub, T.M., Pepper, I.L., and Gerba, C.P.  Virus Survival in Sewage Sludge Amended Desert Soil.  Wat. Sci. Tech.  27:421–424.

1993     Enriquez, C.E., Abbaszadegan, M., Pepper, I.L., Richardson, K.J., and Gerba, C.P.  Poliovirus Detection in Water by Cell Culture and Nucleic Acid Hybridization.  Water Res.  27:1113–1118.

1993     Enriquez, C.E., Abbaszadegan, M., Pepper, I.L., Richardson, K.J., Margolin, A.B., and Gerba, C.P.  Comparison of Poliovirus Detection in Water by Cell Culture and Nucleic Acid Hybridization.  Wat. Sci. Tech.  27:315–319.

1992     Artiola, J.F. and I.L. Pepper.  Long Term Influence of Liquid Sewage Sludge on the Organic Carbon and Nitrogen Content of a Furrow Irrigated Desert Soil.  Biol. Fert. Soils  14:30–36.

1992     Pillai, S.D., K.L. Josephson, R.L. Bailey and I.L. Pepper.  Specific Detection of Rhizobia in Root Nodules and Soil Using the Polymerase Chain Reaction.  Soil Biol. Biochem.  24:885–891.

1992     Soares, A.C., I.L. Pepper and C.P. Gerba.  Recovery of Poliovirus from Sludge-Amended Soils.  J. Environ. Sci. Health.  27:999–1005.

1992     Neilson, J.W., K.L. Josephson, S.D. Pillai and I.L. Pepper.  Polymerase Chain Reaction and Gene Probe Detection of the 2,4-Dichlorophenoxyacetic Acid Degradation Plasmid pJP4.  Appl. Environ. Microbiol.  58:1271–1275.

1992     Artiola, J.F. and I.L. Pepper.  Denitrification Activity in the Root Zone of a Sludge Amended Desert Soil.  Biol. Fert. Soils  13:200–205.

1992     Mancino, C.F. and I.L. Pepper.  Irrigation of Turfgrass with Secondary Sewage Effluent:  Soil Quality.  Agron. J.  84:650–654.

1992     Straub, T.M., I.L. Pepper, C.P. Gerba.  Persistence of Viruses in Desert Soils Amended with Anaerobically Digested Sewage Sludge.  Appl. Environ. Microbiol.  58:636–641.

1991     Josephson, K.L., S.D. Pillai, J. Way, C.P. Gerba and I.L. Pepper.  Fecal Coliforms in Soil Detected by Polymerase Chain Reaction and DNA:DNA Hybridizations.  Soil Sci. Soc. Am. J.  55:1326–1332.

1991     Pillai, S.D., K.L. Josephson, R.L. Bailey, C.P. Gerba and I.L. Pepper.  A Rapid Method for Processing Soil Samples for PCR Amplification of Specific Gene Sequences.  Appl. Environ. Microbiol.  57:2283–2286.

1991     Pillai, S.D. and I.L. Pepper.  Transposon Tn5 as an Identifiable Marker in Rhizobia:  Survival and Genetic Stability of Tn5 Mutant Bean Rhizobia Under Temperature Stressed Conditions in Desert Soils.  Microb. Ecol.  21:21–33.

1991     Josephson, K.L., D.P. Bourque, F.A. Bliss and I.L. Pepper.  Competitiveness of KIM 5 and VIKING 1 Bean Rhizobia.:  Strain by Cultivar Interactions.  Soil Biol. Biochem.  23:249–253.

1990     Hayes, A.R., C.F. Mancino, W.Y. Forden, D.M. Kopec and I.L. Pepper.  Irrigation of Turfgrass with Secondary Sewage Effluent:  II. Turf Quality.  Agron. J.  82:943–946.

1990     Hayes, A.R., C.F. Mancino and I.L. Pepper.  Irrigation of Turfgrass with Secondary Sewage Effluent:  I. Soil and Leachate Water Quality.  Agron. J.  82:939–943.

1990     Neilson, J.W. and I.L. Pepper.  Microbial Respiration as an Index of Soil Aeration.  Soil Sci. Soc. Am. J.  54:428–432.

1990     Soares, A.C., K.L. Josephson, I.L. Pepper and C.P. Gerba.  Occurrence of Enteroviruses and Giardia Cysts in Land Disposed Sewage Sludge.  Hydrology and Water Resources in Arizona and the Southwest.  19:31–36.

1990     Shishido, M. and I.L. Pepper.  Identification of Dominant Indigenous Rhizobium meliloti by Plasmid Profiles and Intrinsic Antibiotic Resistance.  Soil Biol. Biochem.  22:11–16.

1990     Pillai, S.D. and I.L. Pepper.  Survival of Tn5 Mutant Bean Rhizobia in Desert Soils:  Phenotypic Expression of Tn5 Under Moisture Stress.  Soil Biol. Biochem.  22:265–270.

1989     Pepper, I.L., K.L. Josephson, C.S. Nautiyal and D.P. Bourque.  Strain Identification of Highly-Competitive Bean Rhizobia Isolated from Root Nodules:  Use of Fluorescent Antibodies, Plasmid Profiles and Gene Probes.  Soil Biol. Biochem.  21:749–753.

1988     Pepper, I.L., K.L. Josephson, D.P. Bourque and C.S. Nautiyal.  Competitiveness of KIM 5 and VIKING 1 as Determined by Fluorescent Antibodies, Plasmid Profiles and Colony Hybridization.  Soil Biol. Biochem.  21:749–753.

1988     Miller, M.S. and I.L. Pepper.  Physiological and Biochemical Characteristics of a Fast Growing Strain of Lupine Rhizobia Isolated from the Sonoran Desert.  Soil Biol. Biochem.  20:319–322.

1988     Miller, M.S. and I.L. Pepper.  Survival of a Fast Growing Strain of Lupine Rhizobia in Sonoran Desert Soil.  Soil Biol. Biochem.  20:323–327.

1987     Roskosi, J.P., I.L. Pepper and E. Pardo.  Inoculation of Leguminous Trees with Rhizobia and V.A. Mycorrhizal Fungi.  For. Ecol. Manag. 16:57–68.

1987     Ferguson, G.A. and I.L. Pepper.  Retention of Ammonium in Sand Amended with Clinoptilolite.  Soil Sci. Am. J. 51:231–234.

1986     Ferguson, G.A., I.L. Pepper and W.R. Kneebone.  Growth of Creeping Bentgrass on a New Medium for Turfgrass Growth:  Clinoptilolite Zeolite-Amended Sand.  Agron. J. 78:1095–1098.

1985     Watson, J.E., I.L. Pepper, M. Unger and W.H. Fuller.  Yields and Leaf Elemental Composition of Cotton Grown on Sludge-Amended Soil.  J. Environ. Qual. 14:174–177.

1985     Shoushtari, N.H. and I.L. Pepper.  Mesquite Rhizobia Isolated from the Sonoran Desert.  II.  Competitiveness and Survival in Desert Soils.  Soil Biol. Biochem. 17:803–806.

1985     Shoushtari, N.H. and I.L. Pepper.  Mesquite Rhizobia Isolated from the Sonoran Desert.  I.  Physiology and Effectiveness.  Soil Biol. Biochem. 17:797–802.

1984     Kneebone, W.R. and I.L. Pepper.  Luxury Water Use by Bermudagrass.  Agron. J. 76:999–1002.

1984     Josephson, K.L. and Pepper, I.L.  Competitiveness and Effectiveness of Strains of Rhizobium Phaseoli Isolated from the Sonoran Desert.  Soil Biol. Biochem. 16:651–655. 

1984     Babiker, H. and I.L. Pepper.  Microbial Production of Ethylene in Desert Soils.  Soil Biol. and Biochem. 16:559–564. 

1983     Pepper, I.L., D.F. Bezdicek, A.S. Baker and J.M. Sims.  Silage Corn Uptake of Sludge Applied Zn and Cd as Affected by Soil pH.  J. Environ. Qual. 12:270–275.

1982     Kneebone, W.R. and I.L. Pepper.  Consumptive Water Use by Sub-Irrigated Turfgrasses Under Desert Conditions.  Agron. J.  74:419–423.  

1982     Borrelli, J., L.O. Pochop, I.L. Pepper, W.R. Kneebone, R.E. Danielson, W.E. Hart and V.B. Younger.  Calibrations for Blaney Criddle Coefficients for Western Turfgrasses.  J. Irrig. Drainage Div., ASCE 107:333–341.

1981     Vigue, G.T., I.L. Pepper and D.F. Bezdicek.  Effects of Cadmium on Nitrogen Fixation by Field Beans.  J. Environ. Qual. 10:87–89.

1981     Pepper, I.L., E.L. Anderson, W.R. Kneebone and R.J. Drake.  Reclamation of Wastewater by Means of a Soil-Turf Filter.  II.  Removal of Phosphorus, Boron, Sodium and Chlorine.  J. Water Pollut. Control Fed. 53:1408–1412. 

1981     Anderson, E.L., I.L. Pepper and W.R. Kneebone.  Reclamation of Wastewater by Means of a Soil-Turf Filter.  I.  Nitrogen Removal J. Water Pollut. Control Fed. 53:1402–1407.

1980     Drake, R.J., I.L. Pepper, G.V. Johnson and W.R. Kneebone.  Design and Testing of a New Microlysimeter  for Leaching Studies.  Agron. J.  72:397–398. 

1978     Pepper, I.L. and R.H. Miller.  Comparison of the Oxidation of Thiosulfate and Elemental Sulfur by Two Heterotrophic Bacteria and Thiobacillus thiooxidans.  Soil Science 126:9–14. 

1976     Pepper, I.L. and R.H. Miller.  Microbial Inorganic Polyphosphates:  Factors Influencing their Accumulation in Soil.  Soil Sci. Soc. Am. J.  40:872–875.