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water quality & treatment Environmental Engineering


Dr. Amanda (Mandi) Hohner is an Assistant Professor in Civil and Environmental Engineering and leads our group. She studies wildfire-affected watersheds and also examines the impact of nutrient releases on drinking water supplies. Her projects are often in collaboration with water utilities and regulatory agencies concerned about source water quality changes associated with extreme weather events and climatic pressures. She also worked in industry as a Civil Engineer with Black & Veatch in Portland, Oregon and at the City of Spokane Water Reclamation Facility.

For fun and to clear my head, we like to spend time outdoors, hiking and running with our pup. In the winter, we cross‐country ski around where we live, and in the summer we head to the lake to go stand‐up paddle boarding


PACCAR Environmental Technology Building

Office: 444








Mrittika Rodela is a PhD student in Environmental Engineering and joined our research group in August 2019. She received a B.S. in Civil Engineering from Bangladesh University of Engineering and Technology.  Her research focuses on the physicochemical characterization of wildfire ash particles in source waters and the mechanisms for ash removal by drinking water treatment processes. Prior to joining our group Mrittika was a lecturer at Sonargaon University in Bangladesh. 





Saraf Promi is a PhD student in Environmental Engineering  She joined our team in August 2020. Her research focuses on the characterization of fire-derived pyrogenic organic matter (PyOM) in source waters and drinking water systems.

Lab Alumni and Graduates





Austin Pelletier graduated from our group in 2019 and received his MS in Environmental Engineering. His research focused on innovative physio-/electro-chemical systems for the in situ remediation of co-contaminated surface soils, in the context of practical application.  He now works as an Environmental Engineer with RH2 Engineering in Richland, WA.





Elizabeth Crain graduated from our group in 2019 and received her MS in Environmental Engineering. Her research evaluated the use of different coagulants to address post-fire changes in water quality.





Asa Reyes-Chavez is an undergraduate student in Civil and Environmental Engineering. Her research focuses on post-fire water quality characterization. Asa also serves as a tutor and a student ambassador, and is passionate about making WSU and the college of engineering community a better home for all, by promoting women in STEM and diversity throughout the college.







Noah Leibnitz is an undergraduate student at the University of Puget Sound studying Physics. He conducted research with our group from June-August 2018 though the NARA SURE program. His research investigated the effects of post-fire mulching application on source water quality and natural organic matter.









Jered Newcomb graduated from WSU in 2019 with a BS in Civil Engineering. He conducted research with our group from 2018-2019 and is now works with Landau Associates as an Environmental Engineer in Seattle.



Joshua An is an undergraduate student in Chemical Engineering and supports our research team in electrochemical treatment.











Zayne Nelson is an undergraduate student in Civil Engineering and supports our research team in electrochemical treatment.














Lauryn Guerrissi is an MS student in Environmental Engineering. She joined our team in January 2021. Her research focuses on wastewater reuse systems with emphasis in water quality characterization and nutrient recovery processes.