What was found in Boulder City's water
The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate | 939 µg/L 9.4% of the EPA limit 10000 µg/L | 2/4 | SYR4 |
| Nitrate-Nitrite | 514 µg/L 5.1% of the EPA limit 10000 µg/L | 2/4 | SYR4 |
| Fluoride | 360 µg/L 9% of the EPA limit 4000 µg/L | 2/4 | SYR4 |
| Copper | 338 µg/L 26% of the EPA limit 1300 µg/L | 2/4 | SYR4 |
| Nitrite | 213 µg/L 21% of the EPA limit 1000 µg/L | 1/4 | SYR4 |
| Barium | 134 µg/L 6.7% of the EPA limit 2000 µg/L | 2/4 | SYR4 |
| TTHM | 107.6 µg/L 135% of the EPA limit, in the worst sample — 80 µg/L | 4/4 | SYR4 |
| Lithium | 58.6 µg/L No EPA limit set | 1/4 | UCMR-5 |
| Chloroform | 49 µg/L No EPA limit set | 4/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 46.2 µg/L 77% of the EPA limit 60 µg/L | 4/4 | SYR4 |
| Dibromochloromethane | 30.6 µg/L No EPA limit set | 4/4 | SYR4 |
| Dichloroacetic Acid | 30 µg/L No EPA limit set | 4/4 | SYR4 |
| Bromodichloromethane | 29.9 µg/L No EPA limit set | 4/4 | SYR4 |
| Xylenes, Total | 14.5 µg/L 0.1% of the EPA limit 10000 µg/L | 1/4 | SYR4 |
| Trichloroacetic Acid | 12.3 µg/L No EPA limit set | 4/4 | SYR4 |
| Dibromoacetic Acid | 8.43 µg/L No EPA limit set | 4/4 | SYR4 |
| Bromoform | 8.18 µg/L No EPA limit set | 4/4 | SYR4 |
| Selenium | 6.49 µg/L 13% of the EPA limit 50 µg/L | 2/4 | SYR4 |
| Monobromoacetic Acid | 6.4 µg/L No EPA limit set | 4/4 | SYR4 |
| Chromium | 6.05 µg/L 6.1% of the EPA limit 100 µg/L | 2/4 | SYR4 |
| Arsenic | 4.57 µg/L 46% of the EPA limit 10 µg/L | 2/4 | SYR4 |
| Monochloroacetic Acid | 4.55 µg/L No EPA limit set | 4/4 | SYR4 |
| Combined Uranium | 4.26 µg/L 14% of the EPA limit 30 µg/L | 2/4 | SYR4 |
| Antimony, Total | 3 µg/L 50% of the EPA limit 6 µg/L | 2/4 | SYR4 |
| Gross Beta Particle Activity | 2.26 pCi/L No EPA limit set | 2/4 | SYR4 |
| Ethylbenzene | 1.65 µg/L 0.2% of the EPA limit 700 µg/L | 1/4 | SYR4 |
| Combined Radium (-226 And -228) | 1.5 pCi/L 30% of the EPA limit 5 pCi/L | 2/4 | SYR4 |
| Dalapon | 1.14 µg/L 0.6% of the EPA limit 200 µg/L | 1/4 | SYR4 |
| Lead | 0.0035 mg/L 23% of the EPA limit 0.0150 mg/L | 4/4 | LCR |
Water suppliers serving Boulder City
| Supplier | Population served |
|---|---|
| BOULDER CITY | 15,000 |
| NPS BOULDER BEACH | 690 |
| NPS ECHO BAY | 274 |
| NPS CALLVILLE BAY | 250 |
Frequently asked questions about Boulder City tap water
Is Boulder City tap water safe to drink?
EPA testing detected 29 contaminants in the water serving Boulder City. 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 Boulder City?
4 public water suppliers report drinking-water monitoring for Boulder City, Nevada to the EPA. Each is listed above with its population served.
What contaminants are in Boulder City's water?
The contaminants EPA monitoring detected in Boulder City include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Nitrite. The full list, with the highest level found 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.