What was found in Stillwater'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 | 10490 µg/L 105% of the EPA limit, in the worst sample — 10000 µg/L | 3/5 | SYR4 |
| Nitrate-Nitrite | 6860 µg/L 69% of the EPA limit 10000 µg/L | 3/5 | SYR4 |
| Fluoride | 1100 µg/L 28% of the EPA limit 4000 µg/L | 3/5 | SYR4 |
| Copper | 298 µg/L 23% of the EPA limit 1300 µg/L | 5/5 | SYR4 |
| Barium | 223 µg/L 11% of the EPA limit 2000 µg/L | 3/5 | SYR4 |
| TTHM | 145 µg/L 181% of the EPA limit, in the worst sample — 80 µg/L | 4/5 | SYR4 |
| Chloroform | 69.5 µg/L No EPA limit set | 4/5 | SYR4 |
| Bromodichloromethane | 42.8 µg/L No EPA limit set | 4/5 | SYR4 |
| Total Haloacetic Acids (HAA5) | 41.6 µg/L 69% of the EPA limit 60 µg/L | 4/5 | SYR4 |
| Lead | 41.3 µg/L 275% of the EPA limit, in the worst sample — 15 µg/L | 4/5 | SYR4 |
| Dibromochloromethane | 41.1 µg/L No EPA limit set | 4/5 | SYR4 |
| Combined Uranium | 33.9 µg/L 113% of the EPA limit, in the worst sample — 30 µg/L | 2/5 | SYR4 |
| Chromium | 25 µg/L 25% of the EPA limit 100 µg/L | 1/5 | SYR4 |
| Dichloroacetic Acid | 24.3 µg/L No EPA limit set | 3/5 | SYR4 |
| Bromoform | 21.8 µg/L No EPA limit set | 4/5 | SYR4 |
| Lithium | 21.6 µg/L No EPA limit set | 1/5 | UCMR-5 |
| Gross Beta Particle Activity | 16.7 pCi/L No EPA limit set | 3/5 | SYR4 |
| Cyanide | 15 µg/L 7.5% of the EPA limit 200 µg/L | 1/5 | SYR4 |
| Gross Alpha, Excl. Radon And U | 14.9 pCi/L 99% of the EPA limit 15 pCi/L | 3/5 | SYR4 |
| Bromate | 9.3 µg/L 93% of the EPA limit 10 µg/L | 1/5 | SYR4 |
| Trichloroacetic Acid | 8.3 µg/L No EPA limit set | 3/5 | SYR4 |
| Selenium | 8 µg/L 16% of the EPA limit 50 µg/L | 1/5 | SYR4 |
| Dibromoacetic Acid | 7.3 µg/L No EPA limit set | 4/5 | SYR4 |
| Monochloroacetic Acid | 6.32 µg/L No EPA limit set | 1/5 | SYR4 |
| Arsenic | 6 µg/L 60% of the EPA limit 10 µg/L | 1/5 | SYR4 |
| Combined Radium (-226 And -228) | 3 pCi/L 60% of the EPA limit 5 pCi/L | 3/5 | SYR4 |
| Monobromoacetic Acid | 2.74 µg/L No EPA limit set | 3/5 | SYR4 |
| PFOS | 0.0086 µg/L No EPA limit set | 1/5 | UCMR-5 |
| PFHXS | 0.0064 µg/L No EPA limit set | 1/5 | UCMR-5 |
| Pfhxa | 0.0049 µg/L No EPA limit set | 1/5 | UCMR-5 |
| Pfpea | 0.0044 µg/L No EPA limit set | 1/5 | UCMR-5 |
| Lead | 0.0032 mg/L 21% of the EPA limit 0.0150 mg/L | 5/5 | LCR |
| PFBS | 0.0030 µg/L No EPA limit set | 1/5 | UCMR-5 |
Water suppliers serving Stillwater
| Supplier | Population served |
|---|---|
| STILLWATER UTILITIES AUTHORITY | 53,000 |
| PAYNE CO RW CORP #3 | 3,000 |
| 51 EAST WATER | 2,500 |
| PAYNE CO RWD #3 | 1,400 |
| RED WAGON MHP | 46 |
Frequently asked questions about Stillwater tap water
Is Stillwater tap water safe to drink?
EPA testing detected 33 contaminants in the water serving Stillwater. 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 Stillwater?
5 public water suppliers report drinking-water monitoring for Stillwater, Oklahoma to the EPA. Each is listed above with its population served.
What contaminants are in Stillwater's water?
The contaminants EPA monitoring detected in Stillwater include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Barium. 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.