Timothy M. LaPara

Timothy M. LaPara

Timothy M. LaPara

Professor and Mental Health Advocate, Department of Civil, Environmental, and Geo- Engineering


Civil Engineering Building
Room 146
500 Pillsbury Drive Se
Minneapolis, MN 55455
  • Ph.D., 1999, Environmental Engineering, Purdue University
  • B.S.C.E., 1995, University of Notre Dame
Research Interests


Biological wastewater treatment, wastewater microbiology, environmental microbiology, structure-function relationships in mixed microbial communities, microbial ecology, microbial evolution, antibiotic resistance.

Selected Publications

Gordon, B. A., Lenhart, C., & LaPara, T. M. 2020. A comparison of nitrate removal and denitrifying bacteria populations among three wetland plant communities. Journal of Environmental Quality, 49(1), 210-219. doi: 10.1002/jeq2.20004

Ma, B., LaPara, T. M., Evans, A. N., & Hozalski, R. M. 2020. Effects of geographic location and water quality on bacterial communities in full-scale biofilters across North America. FEMS Microbiology Ecology, 96(2), [fiz210]. doi: 10.1093/femsec/fiz210

Waak, M. B., Hozalski, R. M., Hallé, C. & LaPara, T. M. 2019. Comparison of the microbiomes of two drinking water distribution systems - With and without residual chloramine disinfection. Microbiome. 7, 1, 87.

Johnston, J., LaPara, T. M. & Behrens, S. F. 2019. Composition and Dynamics of the Activated Sludge Microbiome during Seasonal Nitrification Failure. Scientific reports. 9, 1, 4565.

Waak, M. B., LaPara, T. M., Hallé, C. & Hozalski, R. M. 2019. Nontuberculous Mycobacteria in Two Drinking Water Distribution Systems and the Role of Residual Disinfection. Environmental Science and Technology. 53, 15, p. 8563-8573.

Sandberg, K. D., Ishii, S. & LaPara, T. M. 2018. A Microfluidic Quantitative Polymerase Chain Reaction Method for the Simultaneous Analysis of Dozens of Antibiotic Resistance and Heavy Metal Resistance Genes. Environmental Science and Technology Letters. 5, 1, p. 20-25.

Pruden, A., Alcalde, R. E., Alvarez, P. J. J., Ashbolt, N., Bischel, H., Capiro, N. L., Crossette, E., Frigon, D., Grimes, K., Haas, C. N., Ikuma, K., Kappell, A., LaPara, T. M., Kimbell, L., Li, M., Li, X., McNamara, P., Seo, Y., Sobsey, M. D., Sozzi, E. & 6 others. 2018. An Environmental Science and Engineering Framework for Combating Antimicrobial Resistance. Environmental Engineering Science. 35, 10, p. 1005-1011.

Aggarwal, S., Gomez-Smith, C. K., Jeon, Y., LaPara, T. M., Waak, M. B. & Hozalski, R. M. 2018. Effects of Chloramine and Coupon Material on Biofilm Abundance and Community Composition in Bench-Scale Simulated Water Distribution Systems and Comparison with Full-Scale Water Mains. Environmental Science and Technology. 52, 22, p. 13077-13088.

Waak, M. B., LaPara, T. M., Hallé, C. & Hozalski, R. M. 2018. Occurrence of Legionella spp. in Water-Main Biofilms from Two Drinking Water Distribution Systems. Environmental Science and Technology. 52, 14, p. 7630-7639.

Kerrigan, J. F., Sandberg, K. D., Engstrom, D. R., LaPara, T. M. & Arnold, B. 2018. Sedimentary record of antibiotic accumulation in Minnesota Lakes. Science of the Total Environment. 621, p. 970-979.

Kerrigan, J. F., Sandberg, K. D., Engstrom, D. R., LaPara, T. M. & Arnold, B. 2018. Small and large-scale distribution of four classes of antibiotics in sediment: association with metals and antibiotic resistance genes. Environmental Science: Processes and Impacts. 20, 8, p. 1167-1179.

Burch, T. R., Sadowsky, M. J. & LaPara, T. M. 2017. Effect of Different Treatment Technologies on the Fate of Antibiotic Resistance Genes and Class 1 Integrons when Residual Municipal Wastewater Solids are Applied to Soil. Environmental Science and Technology. 51, 24, p. 14225-14232.