What was found in Death Valley'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 |
|---|---|---|---|
| Fluoride | 1690 µg/L 42% of the EPA limit 4000 µg/L Main supplier: NPS - DEATH VALLEY, STOVEPIPE WELLS · 175 people · 2017
Highest in the city: 3800 µg/L — NPS - DEATH VALLEY, FURNACE CREEK · 150 people · 2019 | 3/3 | SYR4 |
| TTHM | 36.78 µg/L 46% of the EPA limit 80 µg/L Main supplier: NPS - DEATH VALLEY, STOVEPIPE WELLS · 175 people · 2019 | 3/3 | SYR4 |
| Arsenic | 31 µg/L 310% of the EPA limit, at the 95th percentile of samples — 10 µg/L Highest in the city: NPS - DEATH VALLEY, FURNACE CREEK · 150 people · 2019 | 2/3 | SYR4 |
| Bromoform | 19.585 µg/L No EPA limit set Main supplier: NPS - DEATH VALLEY, STOVEPIPE WELLS · 175 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 13.685 µg/L No EPA limit set Main supplier: NPS - DEATH VALLEY, STOVEPIPE WELLS · 175 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 11.625 µg/L 19% of the EPA limit 60 µg/L Main supplier: NPS - DEATH VALLEY, STOVEPIPE WELLS · 175 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 8.725 µg/L No EPA limit set Main supplier: NPS - DEATH VALLEY, STOVEPIPE WELLS · 175 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 7.77 µg/L No EPA limit set Main supplier: NPS - DEATH VALLEY, STOVEPIPE WELLS · 175 people · 2019 | 3/3 | SYR4 |
| Chloroform | 5.155 µg/L No EPA limit set Main supplier: NPS - DEATH VALLEY, STOVEPIPE WELLS · 175 people · 2019 | 3/3 | SYR4 |
| Combined Uranium | 4.768 µg/L 16% of the EPA limit 30 µg/L Main supplier: NPS - DEATH VALLEY, STOVEPIPE WELLS · 175 people · 2015 | 2/3 | SYR4 |
| Dichloroacetic Acid | 4.35 µg/L No EPA limit set Main supplier: NPS - DEATH VALLEY, STOVEPIPE WELLS · 175 people · 2019 | 3/3 | SYR4 |
| Monobromoacetic Acid | 1 µg/L No EPA limit set Main supplier: NPS - DEATH VALLEY, STOVEPIPE WELLS · 175 people · 2019 | 1/3 | SYR4 |
| Toluene | 0.6000 µg/L 0.1% of the EPA limit 1000 µg/L Main supplier: NPS - DEATH VALLEY, STOVEPIPE WELLS · 175 people · 2019 | 1/3 | SYR4 |
| Lead | 0.0041 mg/L 27% of the EPA limit 0.0150 mg/L Main supplier: NPS - DEATH VALLEY, STOVEPIPE WELLS · 175 people · 2025
Highest in the city: 0.0530 mg/L — NPS - DEATH VALLEY, COW CREEK/NEVARES · 88 people · 2026 | 3/3 | LCR |
Water suppliers serving Death Valley
| Supplier | Population served |
|---|---|
| NPS - DEATH VALLEY, STOVEPIPE WELLS | 175 |
| NPS - DEATH VALLEY, FURNACE CREEK | 150 |
| NPS - DEATH VALLEY, COW CREEK/NEVARES | 88 |
Frequently asked questions about Death Valley tap water
Is Death Valley tap water safe to drink?
EPA testing detected 14 contaminants in the water serving Death Valley. 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 Death Valley?
3 public water suppliers report drinking-water monitoring for Death Valley, California to the EPA. Each is listed above with its population served.
What contaminants are in Death Valley's water?
The contaminants EPA monitoring detected in Death Valley include Fluoride, TTHM, Arsenic, Bromoform, Dibromochloromethane. 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.