What was found in Seminole'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 | 470 µg/L 12% of the EPA limit 4000 µg/L Main supplier: SEMINOLE · 6,899 people · 2019 | 1/1 | SYR4 |
| Nitrate-Nitrite | 403 µg/L 4% of the EPA limit 10000 µg/L Main supplier: SEMINOLE · 6,899 people · 2019 | 1/1 | SYR4 |
| Barium | 157.09 µg/L 7.9% of the EPA limit 2000 µg/L Main supplier: SEMINOLE · 6,899 people · 2019 | 1/1 | SYR4 |
| Copper | 94.5575 µg/L 7.3% of the EPA limit 1300 µg/L Main supplier: SEMINOLE · 6,899 people · 2019 | 1/1 | SYR4 |
| Lithium | 25 µg/L No EPA limit set Main supplier: SEMINOLE · 6,899 people · 2025 | 1/1 | UCMR-5 |
| Lead | 10.082 µg/L 67% of the EPA limit 15 µg/L Main supplier: SEMINOLE · 6,899 people · 2019 | 1/1 | SYR4 |
| Gross Beta Particle Activity | 9.784 pCi/L No EPA limit set Main supplier: SEMINOLE · 6,899 people · 2019 | 1/1 | SYR4 |
| Selenium | 9.5 µg/L 19% of the EPA limit 50 µg/L Main supplier: SEMINOLE · 6,899 people · 2019 | 1/1 | SYR4 |
| Gross Alpha, Excl. Radon And U | 7.906 pCi/L 53% of the EPA limit 15 pCi/L Main supplier: SEMINOLE · 6,899 people · 2019 | 1/1 | SYR4 |
| TTHM | 7.436 µg/L 9.3% of the EPA limit 80 µg/L Main supplier: SEMINOLE · 6,899 people · 2019 | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 5.304 pCi/L 106% of the EPA limit, at the 95th percentile of samples — 5 pCi/L Main supplier: SEMINOLE · 6,899 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 2.78 µg/L No EPA limit set Main supplier: SEMINOLE · 6,899 people · 2019 | 1/1 | SYR4 |
| Arsenic | 2.16 µg/L 22% of the EPA limit 10 µg/L Main supplier: SEMINOLE · 6,899 people · 2019 | 1/1 | SYR4 |
| Bromoform | 1.9005 µg/L No EPA limit set Main supplier: SEMINOLE · 6,899 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 1.87 µg/L No EPA limit set Main supplier: SEMINOLE · 6,899 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 1.38 µg/L No EPA limit set Main supplier: SEMINOLE · 6,899 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 1.38 µg/L 2.3% of the EPA limit 60 µg/L Main supplier: SEMINOLE · 6,899 people · 2019 | 1/1 | SYR4 |
| Antimony, Total | 1.1445 µg/L 19% of the EPA limit 6 µg/L Main supplier: SEMINOLE · 6,899 people · 2019 | 1/1 | SYR4 |
| Chloroform | 1.118 µg/L No EPA limit set Main supplier: SEMINOLE · 6,899 people · 2019 | 1/1 | SYR4 |
| Chromium | 0.9000 µg/L 0.9% of the EPA limit 100 µg/L Main supplier: SEMINOLE · 6,899 people · 2019 | 1/1 | SYR4 |
| Mercury | 0.1520 µg/L 7.6% of the EPA limit 2 µg/L Main supplier: SEMINOLE · 6,899 people · 2019 | 1/1 | SYR4 |
| Lead | 0.0017 mg/L 11% of the EPA limit 0.0150 mg/L Main supplier: SEMINOLE · 6,899 people · 2025 | 1/1 | LCR |
Water suppliers serving Seminole
| Supplier | Population served |
|---|---|
| SEMINOLE | 6,899 |
Frequently asked questions about Seminole tap water
Is Seminole tap water safe to drink?
EPA testing detected 22 contaminants in the water serving Seminole. 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 Seminole?
1 public water supplier report drinking-water monitoring for Seminole, Oklahoma to the EPA. Each is listed above with its population served.
What contaminants are in Seminole's water?
The contaminants EPA monitoring detected in Seminole include Fluoride, Nitrate-Nitrite, Barium, Copper, Lithium. 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.