What was found in Winnemucca's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 6800 µg/L 68% of the EPA limit 10000 µg/L Main supplier: WINNEMUCCA CITY OF · 8,518 people · 2019
Highest in the city: 13000 µg/L — GOLD COUNTRY ESTATES · 1,695 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 7200 µg/L 72% of the EPA limit 10000 µg/L Main supplier: WINNEMUCCA CITY OF · 8,518 people · 2019
Highest in the city: 10560 µg/L — GOLD COUNTRY ESTATES · 1,695 people · 2018 | 3/3 | SYR4 |
| Fluoride | 400 µg/L 10% of the EPA limit 4000 µg/L Main supplier: WINNEMUCCA CITY OF · 8,518 people · 2019
Highest in the city: 565 µg/L — GOLD COUNTRY ESTATES · 1,695 people · 2019 | 3/3 | SYR4 |
| Nitrite | 230 µg/L 23% of the EPA limit 1000 µg/L Main supplier: WINNEMUCCA CITY OF · 8,518 people · 2019 | 1/3 | SYR4 |
| Barium | 139.5 µg/L 7% of the EPA limit 2000 µg/L Main supplier: WINNEMUCCA CITY OF · 8,518 people · 2017
Highest in the city: 165 µg/L — STAR CITY PROPERTIES · 285 people · 2014 | 3/3 | SYR4 |
| Lithium | 70.7 µg/L No EPA limit set Main supplier: WINNEMUCCA CITY OF · 8,518 people · 2025 | 1/3 | UCMR-5 |
| Copper | 2.9 µg/L 0.2% of the EPA limit 1300 µg/L Main supplier: WINNEMUCCA CITY OF · 8,518 people · 2019
Highest in the city: 26.25 µg/L — STAR CITY PROPERTIES · 285 people · 2018 | 3/3 | SYR4 |
| Selenium | 5.75 µg/L 12% of the EPA limit 50 µg/L Main supplier: WINNEMUCCA CITY OF · 8,518 people · 2017
Highest in the city: 20.1 µg/L — GOLD COUNTRY ESTATES · 1,695 people · 2018 | 3/3 | SYR4 |
| TTHM | 4.02 µg/L 5% of the EPA limit 80 µg/L Main supplier: WINNEMUCCA CITY OF · 8,518 people · 2019
Highest in the city: 17.745 µg/L — GOLD COUNTRY ESTATES · 1,695 people · 2019 | 2/3 | SYR4 |
| Bromoform | 4.02 µg/L No EPA limit set Main supplier: WINNEMUCCA CITY OF · 8,518 people · 2019
Highest in the city: 11.39 µg/L — GOLD COUNTRY ESTATES · 1,695 people · 2019 | 2/3 | SYR4 |
| Arsenic | 9.45 µg/L 95% of the EPA limit 10 µg/L Main supplier: WINNEMUCCA CITY OF · 8,518 people · 2019 | 2/3 | SYR4 |
| Chromium | 2 µg/L 2% of the EPA limit 100 µg/L Main supplier: WINNEMUCCA CITY OF · 8,518 people · 2017
Highest in the city: 7 µg/L — GOLD COUNTRY ESTATES · 1,695 people · 2018 | 3/3 | SYR4 |
| Combined Uranium | 7 µg/L 23% of the EPA limit 30 µg/L Main supplier: WINNEMUCCA CITY OF · 8,518 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 4.925 µg/L No EPA limit set Highest in the city: GOLD COUNTRY ESTATES · 1,695 people · 2019 | 1/3 | SYR4 |
| Gross Beta Particle Activity | 4.598 pCi/L No EPA limit set Main supplier: WINNEMUCCA CITY OF · 8,518 people · 2019 | 2/3 | SYR4 |
| Lead | 4 µg/L 27% of the EPA limit 15 µg/L Highest in the city: GOLD COUNTRY ESTATES · 1,695 people · 2018 | 1/3 | SYR4 |
| Dibromoacetic Acid | 1 µg/L No EPA limit set Main supplier: WINNEMUCCA CITY OF · 8,518 people · 2019
Highest in the city: 2.96 µg/L — GOLD COUNTRY ESTATES · 1,695 people · 2019 | 2/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 1 µg/L 1.7% of the EPA limit 60 µg/L Main supplier: WINNEMUCCA CITY OF · 8,518 people · 2019
Highest in the city: 2.96 µg/L — GOLD COUNTRY ESTATES · 1,695 people · 2019 | 2/3 | SYR4 |
| Bromodichloromethane | 1.8405 µg/L No EPA limit set Highest in the city: GOLD COUNTRY ESTATES · 1,695 people · 2019 | 1/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.6 µg/L 27% of the EPA limit 6 µg/L Main supplier: WINNEMUCCA CITY OF · 8,518 people · 2019 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 1.038 pCi/L 21% of the EPA limit 5 pCi/L Main supplier: WINNEMUCCA CITY OF · 8,518 people · 2019
Highest in the city: 1.2 pCi/L — STAR CITY PROPERTIES · 285 people · 2016 | 3/3 | SYR4 |
| Xylenes, Total | 0.5300 µg/L 0% of the EPA limit 10000 µg/L Highest in the city: GOLD COUNTRY ESTATES · 1,695 people · 2019 | 1/3 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: WINNEMUCCA CITY OF · 8,518 people · 2025
Highest in the city: 0.0020 mg/L — GOLD COUNTRY ESTATES · 1,695 people · 2023 | 3/3 | LCR |
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of the
system's samples — over 100% is worth reading, but is not by itself a
violation.
Formal violations are listed separately.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Winnemucca
| Supplier | Population served |
|---|---|
| WINNEMUCCA CITY OF | 8,518 |
| GOLD COUNTRY ESTATES | 1,695 |
| STAR CITY PROPERTIES | 285 |
Frequently asked questions about Winnemucca tap water
Is Winnemucca tap water safe to drink?
EPA testing detected 23 contaminants in the water serving Winnemucca. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Winnemucca?
3 public water suppliers report drinking-water monitoring for Winnemucca, Nevada to the EPA. Each is listed above with its population served.
What contaminants are in Winnemucca's water?
The contaminants EPA monitoring detected in Winnemucca include Nitrate, Nitrate-Nitrite, Fluoride, Nitrite, Barium. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.