Stuart William Krasner (Born 1949), was the Principal Environmental Specialist (retired) with the Metropolitan Water District of Southern California, at the Water Quality Laboratory located in La Verne, California. In his 41 years with Metropolitan, he made revolutionary changes in the field’s understanding of how disinfection by-products occur, are formed and how they can be controlled in drinking water. His research contributions include the study of emerging DBPs including those associated with chlorine, chloramines, ozone, chlorine dioxide and bromide/iodide-containing waters. He made groundbreaking advances in understanding the watershed sources of pharmaceuticals and personal care products (PPCPs) and wastewater impacts on drinking-water supplies. For DBPs and PPCPs, he developed analytical methods and occurrence data and he provided technical expertise for the development of regulations for these drinking water contaminants. In the early 1990s, Krasner developed the 3×3 matrix illustrating removal of total organic carbon from drinking water as a function of water alkalinity and initial total organic carbon concentration. The matrix was revised by him and included in the USEPA Stage 1 D/DBP regulation as the enhanced coagulation requirement. Every water utility in the U.S. that is subject to this regulation is required to meet total organic carbon removal requirements along with their exceptions.
He has been a key member of the toxicology and epidemiology community by providing key data for the development of improved carcinogen and non-carcinogen exposure assessments. In his early career at Metropolitan he developed key advances in the control of tastes and odors in drinking water including analytical methods, sensory analysis and determining sources and treatment of off-flavors.
Stuart W. Krasner was born in 1949 in Los Angeles, California, and at the age of two, he moved with his family to Van Nuys, California where he grew up. He attended Kester Avenue Elementary School and Van Nuys High School. His father worked as an aerospace engineer at several companies in the Los Angeles area. His mother worked in the bookkeeping department for Warner Bros. Movie Studios before becoming a homemaker. His brother, Stanley, is three years younger. Stuart married Jan Patrice Barth on September 10, 1989.
He earned his Bachelor of Science in chemistry (1971) and his Master of Science in analytical chemistry (1974) from the University of California, Los Angeles.
Krasner was a teaching and research assistant during his graduate work at UCLA. He worked for the Los Angeles County Sanitation Districts for four years (1974–77) before taking a position as a chemist with the Metropolitan Water District of Southern California in 1977. From the beginning of his career at Metropolitan, Krasner worked at the water quality laboratory which is located at the F.E. Weymouth Treatment Plant in La Verne, California. He held increasingly responsible positions as Research Chemist, Senior Chemist and Senior Research Chemist until being promoted to Principal Environmental Specialist in 1997. He retired from Metropolitan in September 2018.
As Principal Environmental Specialist, Krasner was responsible for the technical direction of DBP research at Metropolitan, as well as studies on the control of other micropollutants of health, regulatory, and aesthetic significance. He was involved in the design of experimental plans for natural organic matter (NOM), DBP, and PPCP research studies, project management, and interpretation of findings. In 1989, his article on the first national survey of multiple-DBP occurrence has received over 1,000 citations by other authors. Another survey of a new generation of DBPs in 2006 has been cited over 1,100 times.
A few of the many externally funded projects for which he was responsible include:
- Co-Principal Investigator of a National Science Foundation (NSF) project on “Drinking Water Safety and Sustainability: Identifying Key Chemical Drivers of Toxicity for Long-Term Solutions in the United States.” (2017 – present)
- Technical advisor for a project on “Global Assessment of Exposure to Trihalomethanes in Drinking Water and Burden of Disease” being conducted by the Barcelona Institute for Global Health (ISGlobal). (2017 – present).
- Principal investigator for Water Research Foundation project on “Nitrosamine Occurrence Survey.” (2013 – 2016).”
- Co-principal investigator for Water Research Foundation project on “Investigating Coagulant Aid Alternatives to polyDADMAC Polymers.” (2012 – 2015)
- Principal investigator for Water Research Foundation project on “Controlling the Formation of Nitrosamines during Water Treatment.” (2012 – 2015)
- Co-principal investigator for Water Research Foundation project on “Optimizing Conventional Treatment for Removal of Cyanobacteria and their Metabolites.” (2011 – 2015)
He was a consultant to the drinking water community since 1983. Some of his projects included:
- Peer reviewer for Imperial College, London, of report on “Review of the Current Toxicological and Occurrence Information Available on Nitrogen-Containing Disinfection By-Products.”
- Technical advisor to the University of the Aegean on reinterpreting DBP data for a European Union project (HiWATE) on DBPs.
- Technical auditor for the European Commission on laboratory practices for a project (HiWATE) on DBPs.
- Technical advisor for Scottish Executive study on “The Formation of Disinfection By-products of Chloramination, Potential Health Implications and Techniques for Minimisation.”
- Workshop participant for National Science Foundation on “Engineering Controls for Ballast Water Discharge: Developing Research Needs.”
- Co-investigator for AwwaRF project on “Improved Exposure Assessment on Existing Cancer Studies.”
- Co-investigator on USEPA project on “Enhanced Evaluation of Disinfectant By-Product Exposures for Epidemiological Studies.”