Drinking Water and Wastewater Infrastructure Science Team
The Team Studies Toxicants and Pathogens in Drinking Water
To understand if and when humans are exposed
The Team Studies Toxicants and Pathogens in Streams
To understand if and when wildlife are exposed
The Team Studies Toxicant and Pathogen Sources and Movement
The Team Develops Tools to Understand Health Effects
The team studies toxicants and pathogens in water resources from their sources, through watersheds, aquifers, and infrastructure to human and wildlife exposures. That information is used to develop decision tools that protect human and wildlife health.
Americans rely on treatment of drinking water and wastewater, and the maintenance of water distribution infrastructure to assure safe water supplies for the public and wildlife. New chemicals are manufactured and used every day. Populations grow and demographics shift. Treatment, conveyance and plumbing infrastructure ages, and new technologies are developed to detect contaminants (toxicants and pathogens) at low levels. Consequently, questions arise about the health effects of exposure to contaminants indivually or in complex mixtures.
The US Geological Survey’s Drinking Water and Wastewater Infrastructure Science Team provides information on processes that affect contaminants as they move from naturally occurring and human-caused sources through aquifers, aquatic environments, and infrastructure. This comprehensive understanding of contaminant profiles from source to exposure is used to develop decision tools to economically, effectively, and efficiently reduce wildlife or human exposure and associated health risks.
The Team's science includes underserved urban and rural agricultural communities and in tribal nations, which are disproportionally impacted by geologic and climatic events, by drinking-water source limitations and resultant dependence on water-reuse and unregulated/unmonitored private-wells.
More Information
Date Visualization: "Drop by Drop" and "PFAS Interactive Tool"
GeoHEALTH–USGS Newsletter-Special Issue on Drinking Water


Questions That the Team Answers:
- Is treated wastewater effluent a source of contaminants to streams that serve as source water for publicly and self-supplied drinking water supplies?
- What contaminants are in tap waters from publicly and self-supplied drinking water sources?
- What factors influence the types of contaminants that are present in tap water?
- Are there hazards to fish and wildlife associated with exposure to low-levels of contaminants in streams that receive wastewater?
- What mitigation actions are the most efficient and cost effective at reducing exposure at the tap for humans? Or in water resources for wildlife?
- Can decision tools be established to to define, prioritize and mitigate human and wildlife health risks?
USGS featured science articles related to this science team’s activities.
Inorganic and Organic Chemical Mixtures Detected in both Public and Private Tap Water in Cape Cod, Massachusetts
Science to Understand Low-Level Exposures to Neonicotinoid Pesticides, their Metabolites, and Chlorinated Byproducts in Drinking Water
Per- and Polyfluoroalkyl Substances (PFAS) in Residential Tap Water: Source-to-Tap Science for Underserved Communities
Mixtures of Organic and Inorganic Chemicals Characterized in Water from the Taps of Residences in the Greater Chicago Area— Science to Understand Contaminant Exposures in Drinking Water
Ongoing Research to Characterize the Complexity of Chemical Mixtures in Water Resources—Urban Stormwater
Pilot Study Provides Information on Contaminant Exposure from Tap Water at Residential and Workplace Sites in the United States
Per- and Polyfluoroalkyl Substances (PFASs) detected in Source Waters and Treated Public Water Supplies
Novel Approach Improves Understanding of Virus Occurrence in Drinking Water
Exploring the Suitability of a Modeling Approach to Estimate Contaminant Occurrence in Drinking Water Sources
Comparison of Predicted and Measured Pharmaceutical Concentrations in Rivers
Sources of Contaminants to Congaree National Park—USGS and National Park Service Working Together
Multi-State Survey Measures Parabens in Municipal Wastewater Biosolids
USGS data releases associated with this science team.
Chemical concentration results for assessment of mixed-organic/inorganic chemical exposures in the southeast United States, beginning 2022
Per- and polyfluoroalkyl substances (PFAS) results in tapwater samples, in select areas within the United States, beginning 2023
Quaternary ammonium compounds in wastewater treatment effluents from 2020 to 2021
Environmental Sampling and Modeling Results to Characterize Surface-Water Quality at 32 Sites Across the Potomac River Watershed, 2022 (ver. 3.0, April 2025)
Concentrations of 6PPD and 6PPD-Quinone in a United States reconnaissance of stormwater, surface water, and groundwater, 2018-24
Target-chemical concentrations and microbiological results in surface water and tapwater, Montana, 2022
Target-Chemical Concentrations, Exposure Activity Ratios, and Bioassay Results for Assessment of Mixed-Organic/Inorganic Chemical Exposures in Northeast Iowa Private-Well Tapwater, 2018
Target-Chemical Concentrations and Microbiological Results for Assessment of Mixed Contaminant and Biological Exposures in Bottled Water, 2020
Target-Chemical Concentration Results for Assessment of Mixed-Organic/Inorganic Chemical and Biological Exposures in North Dakota and South Dakota Tapwater, 2019
Inorganic Concentration Results for Assessment of Mixed Organic/Inorganic Chemical and Biological Exposures in North Dakota and South Dakota Tapwater, 2019
Concentrations of organic and inorganic constituents in tapwater samples from California in 2020-21 (ver. 3.1, March 2024)
Pesticides and pesticide transformation product data from passive samplers deployed in 15 Great Lakes tributaries, 2016
USGS publications associated with this science team.
Public, bottled, and private drinking water: Shared contaminant-mixture exposures and effects challenge
Temporal concentrations of Quaternary ammonium compounds in wastewater treatment effluents during the COVID-19 pandemic, 2020–2021
Mixed contaminant exposure in tapwater and the potential implications for human-health in disadvantaged communities in California
Per- and polyfluoroalkyl substances (PFAS) in drinking water in Southeast Los Angeles: Industrial legacy and environmental justice
Tire-derived contaminants 6PPD and 6PPD-Q: Analysis, sample handling, and reconnaissance of United States stream exposures
Association of water arsenic with incident diabetes in U.S. adults: The Multi-Ethnic Study of Atherosclerosis and The Strong Heart Study
A brief note on substantial sub-daily arsenic variability in pumping drinking-water wells in New Hampshire
Per- and polyfluoroalkyl substances (PFAS) in United States tapwater: Comparison of underserved private-well and public-supply exposures and associated health implications
Predicted aquatic exposure effects from a national urban stormwater study
Juxtaposition of intensive agriculture, vulnerable aquifers, and mixed chemical/microbial exposures in private-well tapwater in northeast Iowa
Bottled water contaminant exposures and potential human effects
Tapwater exposures, effects potential, and residential risk management in Northern Plains Nations
The team studies toxicants and pathogens in water resources from their sources, through watersheds, aquifers, and infrastructure to human and wildlife exposures. That information is used to develop decision tools that protect human and wildlife health.
Americans rely on treatment of drinking water and wastewater, and the maintenance of water distribution infrastructure to assure safe water supplies for the public and wildlife. New chemicals are manufactured and used every day. Populations grow and demographics shift. Treatment, conveyance and plumbing infrastructure ages, and new technologies are developed to detect contaminants (toxicants and pathogens) at low levels. Consequently, questions arise about the health effects of exposure to contaminants indivually or in complex mixtures.
The US Geological Survey’s Drinking Water and Wastewater Infrastructure Science Team provides information on processes that affect contaminants as they move from naturally occurring and human-caused sources through aquifers, aquatic environments, and infrastructure. This comprehensive understanding of contaminant profiles from source to exposure is used to develop decision tools to economically, effectively, and efficiently reduce wildlife or human exposure and associated health risks.
The Team's science includes underserved urban and rural agricultural communities and in tribal nations, which are disproportionally impacted by geologic and climatic events, by drinking-water source limitations and resultant dependence on water-reuse and unregulated/unmonitored private-wells.
More Information
Date Visualization: "Drop by Drop" and "PFAS Interactive Tool"
GeoHEALTH–USGS Newsletter-Special Issue on Drinking Water


Questions That the Team Answers:
- Is treated wastewater effluent a source of contaminants to streams that serve as source water for publicly and self-supplied drinking water supplies?
- What contaminants are in tap waters from publicly and self-supplied drinking water sources?
- What factors influence the types of contaminants that are present in tap water?
- Are there hazards to fish and wildlife associated with exposure to low-levels of contaminants in streams that receive wastewater?
- What mitigation actions are the most efficient and cost effective at reducing exposure at the tap for humans? Or in water resources for wildlife?
- Can decision tools be established to to define, prioritize and mitigate human and wildlife health risks?
USGS featured science articles related to this science team’s activities.
Inorganic and Organic Chemical Mixtures Detected in both Public and Private Tap Water in Cape Cod, Massachusetts
Science to Understand Low-Level Exposures to Neonicotinoid Pesticides, their Metabolites, and Chlorinated Byproducts in Drinking Water
Per- and Polyfluoroalkyl Substances (PFAS) in Residential Tap Water: Source-to-Tap Science for Underserved Communities
Mixtures of Organic and Inorganic Chemicals Characterized in Water from the Taps of Residences in the Greater Chicago Area— Science to Understand Contaminant Exposures in Drinking Water
Ongoing Research to Characterize the Complexity of Chemical Mixtures in Water Resources—Urban Stormwater
Pilot Study Provides Information on Contaminant Exposure from Tap Water at Residential and Workplace Sites in the United States
Per- and Polyfluoroalkyl Substances (PFASs) detected in Source Waters and Treated Public Water Supplies
Novel Approach Improves Understanding of Virus Occurrence in Drinking Water
Exploring the Suitability of a Modeling Approach to Estimate Contaminant Occurrence in Drinking Water Sources
Comparison of Predicted and Measured Pharmaceutical Concentrations in Rivers
Sources of Contaminants to Congaree National Park—USGS and National Park Service Working Together
Multi-State Survey Measures Parabens in Municipal Wastewater Biosolids
USGS data releases associated with this science team.
Chemical concentration results for assessment of mixed-organic/inorganic chemical exposures in the southeast United States, beginning 2022
Per- and polyfluoroalkyl substances (PFAS) results in tapwater samples, in select areas within the United States, beginning 2023
Quaternary ammonium compounds in wastewater treatment effluents from 2020 to 2021
Environmental Sampling and Modeling Results to Characterize Surface-Water Quality at 32 Sites Across the Potomac River Watershed, 2022 (ver. 3.0, April 2025)
Concentrations of 6PPD and 6PPD-Quinone in a United States reconnaissance of stormwater, surface water, and groundwater, 2018-24
Target-chemical concentrations and microbiological results in surface water and tapwater, Montana, 2022
Target-Chemical Concentrations, Exposure Activity Ratios, and Bioassay Results for Assessment of Mixed-Organic/Inorganic Chemical Exposures in Northeast Iowa Private-Well Tapwater, 2018
Target-Chemical Concentrations and Microbiological Results for Assessment of Mixed Contaminant and Biological Exposures in Bottled Water, 2020
Target-Chemical Concentration Results for Assessment of Mixed-Organic/Inorganic Chemical and Biological Exposures in North Dakota and South Dakota Tapwater, 2019
Inorganic Concentration Results for Assessment of Mixed Organic/Inorganic Chemical and Biological Exposures in North Dakota and South Dakota Tapwater, 2019
Concentrations of organic and inorganic constituents in tapwater samples from California in 2020-21 (ver. 3.1, March 2024)
Pesticides and pesticide transformation product data from passive samplers deployed in 15 Great Lakes tributaries, 2016
USGS publications associated with this science team.