Nevada tap water quality
212 community water systems serving 3.1 million people.
Data: U.S. EPA · How we read the data · How we check it
PFAS: EPA's 2023–2025 testing. Lead: results from the last five years. 24 more systems have no recent lead results in EPA's database.
Water systems with PFAS above the federal limit
Based on EPA's UCMR 5 results (2023–2025) compared to the April 2024 limits, the way EPA compares them. Systems have until 2029 to comply. Largest first.
- Truckee Meadows Water Authority442,000 people · Surface water · NevadaPFOA above limitAlso: PFOS above limit · PFHxS detected · Lithium above screening level
- Fernley Public Works23,064 people · Groundwater · NevadaPFOS above limitAlso: Lithium above screening level · 1 health-based violation since 2016
- City of Elko23,000 people · Groundwater · NevadaPFOA above limitAlso: PFOS above limit · PFHxS above limit · PFAS Hazard Index above limit
Nevada PFAS report: chart, rankings and data to download →
Largest water systems in Nevada
- Las Vegas Valley Water District1.5 million people · Purchased surface water · NevadaLithium above screening level
- Truckee Meadows Water Authority442,000 people · Surface water · NevadaPFOA above limitAlso: PFOS above limit · PFHxS detected · Lithium above screening level
- North Las Vegas Utilities376,515 people · Purchased surface water · NevadaLithium above screening level
- City of Henderson336,534 people · Purchased surface water · NevadaLithium above screening level
- Carson City Public Works59,000 people · Surface water · NevadaLithium above screening level
- Virgin Valley Water District26,000 people · Groundwater · NevadaLithium above screening level
- Fernley Public Works23,064 people · Groundwater · NevadaPFOS above limitAlso: Lithium above screening level · 1 health-based violation since 2016
- City of Elko23,000 people · Groundwater · NevadaPFOA above limitAlso: PFOS above limit · PFHxS above limit · PFAS Hazard Index above limit
- Nellis Air Force Base Water System19,081 people · Purchased surface water · NevadaTotal trihalomethanes (TTHM) violationsAlso: Lithium above screening level
- Sun Valley General Improvement District17,000 people · Purchased surface water · NevadaNo PFAS above limits
- Dayton Valley Water System16,000 people · Groundwater · NevadaLithium above screening level
- Boulder City Water System15,000 people · Purchased surface water · NevadaLithium above screening level
- Great Basin Water Company12,255 people · Groundwater · NevadaNo PFAS above limits
- Gardnerville Ranchos General Improvement District11,300 people · Groundwater · NevadaLithium above screening level
- Great Basin Water Company Cold Springs9,910 people · Groundwater · NevadaColiform bacteria violation
Nevada cities and towns
Most health-based violations since 2016
- Rosemount Water Company54 people · Groundwater · NevadaUranium violations
- Silver Knolls Mutual Water Company120 people · Groundwater · NevadaArsenic violations
- Shoshone Estates Water Company Inc240 people · Groundwater · NevadaArsenic violations
- McDermitt Water System200 people · Groundwater · NevadaArsenic violations
- Old River Water Company300 people · Groundwater · NevadaArsenic violationsAlso: Coliform bacteria violations
- Duckwater166 people · Groundwater · NevadaNot in EPA's PFAS sampleAlso: 13 health-based violations since 2016
- Primm Valley Casino Resorts Water System7,000 people · Groundwater · NevadaLithium above screening levelAlso: 12 health-based violations since 2016
- Desert Sunrise Water Users Association25 people · Groundwater · NevadaNot in EPA's PFAS sampleAlso: 11 health-based violations since 2016
- Roark Estates Water Association60 people · Groundwater · NevadaArsenic violationsAlso: Coliform bacteria violation
- Equestrian Estates County Op Water Association108 people · Groundwater · NevadaArsenic violations
- Bermuda Palms Management LLC60 people · Groundwater · NevadaArsenic violations
- Yerington (Campbell Ranch) Water System512 people · Groundwater · NevadaArsenic violations
- Goldfield Town Water350 people · Groundwater · NevadaArsenic violations
- Ft. McDermitt Paiute-Shoshone – Upper Water System110 people · Groundwater · NevadaColiform bacteria violations
- Sutcliffe Mobile Park Water System60 people · Groundwater · NevadaArsenic violations
All Nevada utilities on this site
Every Nevada system serving 50,000+ people or with PFAS above a federal limit, A to Z. Download all 212 systems as CSV.
- Carson City Public Works
- City of Elko
- City of Henderson
- Fernley Public Works
- Las Vegas Valley Water District
- North Las Vegas Utilities
- Truckee Meadows Water Authority
Questions
Does Nevada tap water have PFAS?
EPA tested 37 community water systems in Nevada for 29 PFAS between 2023 and 2025. 4 had at least one regulated PFAS detected, and 3 had an entry-point average above a 2024 federal limit. Those 3 systems serve about 488,064 people (16% of people on community water in Nevada). Systems have until 2029 to meet the limits.
How many Nevada water systems have violations?
83 systems in Nevada had at least one health-based violation since 2016 (431 violations in total). 148 violations are currently listed as unaddressed.
Which Nevada water systems are over the lead action level?
2 systems had a lead 90th percentile above the 15 ppb action level in their most recent results from the last five years. Another 24 systems have no lead results in EPA's database from the last five years. Lead depends on each home's pipes, so a test of your own tap is the only way to know your level.
Source: U.S. EPA drinking water records and PFAS testing (UCMR 5). How we read the data.