What was found in Skiatook'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 | 340 µg/L 8.5% of the EPA limit 4000 µg/L Main supplier: SKIATOOK PWA · 8,110 people · 2018 | 1/2 | SYR4 |
| Nitrate-Nitrite | 290 µg/L 2.9% of the EPA limit 10000 µg/L Main supplier: SKIATOOK PWA · 8,110 people · 2019 | 1/2 | SYR4 |
| Copper | 128.25 µg/L 9.9% of the EPA limit 1300 µg/L Main supplier: SKIATOOK PWA · 8,110 people · 2018
Highest in the city: 238.2 µg/L — OSAGE CO RWD #15 · 6,647 people · 2019 | 2/2 | SYR4 |
| TTHM | 97.75 µg/L 122% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: SKIATOOK PWA · 8,110 people · 2019
Highest in the city: 129.1 µg/L — OSAGE CO RWD #15 · 6,647 people · 2019 | 2/2 | SYR4 |
| Chloroform | 27.38 µg/L No EPA limit set Main supplier: SKIATOOK PWA · 8,110 people · 2019
Highest in the city: 41.19 µg/L — OSAGE CO RWD #15 · 6,647 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 35.58 µg/L No EPA limit set Main supplier: SKIATOOK PWA · 8,110 people · 2019
Highest in the city: 39.475 µg/L — OSAGE CO RWD #15 · 6,647 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 28.08 µg/L No EPA limit set Main supplier: SKIATOOK PWA · 8,110 people · 2019
Highest in the city: 37.42 µg/L — OSAGE CO RWD #15 · 6,647 people · 2019 | 2/2 | SYR4 |
| Barium | 36 µg/L 1.8% of the EPA limit 2000 µg/L Main supplier: SKIATOOK PWA · 8,110 people · 2018 | 1/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 19.595 µg/L 33% of the EPA limit 60 µg/L Main supplier: SKIATOOK PWA · 8,110 people · 2019
Highest in the city: 29.01 µg/L — OSAGE CO RWD #15 · 6,647 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 10.9065 µg/L No EPA limit set Main supplier: SKIATOOK PWA · 8,110 people · 2019
Highest in the city: 16.385 µg/L — OSAGE CO RWD #15 · 6,647 people · 2019 | 2/2 | SYR4 |
| Bromoform | 12.6 µg/L No EPA limit set Main supplier: SKIATOOK PWA · 8,110 people · 2019
Highest in the city: 14.51 µg/L — OSAGE CO RWD #15 · 6,647 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 7.761 µg/L No EPA limit set Main supplier: SKIATOOK PWA · 8,110 people · 2019
Highest in the city: 8.428 µg/L — OSAGE CO RWD #15 · 6,647 people · 2019 | 2/2 | SYR4 |
| Lead | 7.8 µg/L 52% of the EPA limit 15 µg/L Highest in the city: OSAGE CO RWD #15 · 6,647 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 6.553 µg/L No EPA limit set Main supplier: SKIATOOK PWA · 8,110 people · 2019
Highest in the city: 7.331 µg/L — OSAGE CO RWD #15 · 6,647 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 3.532 µg/L No EPA limit set Main supplier: SKIATOOK PWA · 8,110 people · 2019 | 2/2 | SYR4 |
| Gross Beta Particle Activity | 2.2 pCi/L No EPA limit set Main supplier: SKIATOOK PWA · 8,110 people · 2017 | 1/2 | SYR4 |
| Monobromoacetic Acid | 1.369 µg/L No EPA limit set Main supplier: SKIATOOK PWA · 8,110 people · 2019
Highest in the city: 1.964 µg/L — OSAGE CO RWD #15 · 6,647 people · 2019 | 2/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1.23 pCi/L 8.2% of the EPA limit 15 pCi/L Main supplier: SKIATOOK PWA · 8,110 people · 2017 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 0.3880 pCi/L 7.8% of the EPA limit 5 pCi/L Main supplier: SKIATOOK PWA · 8,110 people · 2017 | 1/2 | SYR4 |
| Pfba | 0.0079 µg/L No EPA limit set Main supplier: SKIATOOK PWA · 8,110 people · 2024 | 2/2 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: SKIATOOK PWA · 8,110 people · 2025 | 2/2 | 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 Skiatook
| Supplier | Population served |
|---|---|
| SKIATOOK PWA | 8,110 |
| OSAGE CO RWD #15 | 6,647 |
Frequently asked questions about Skiatook tap water
Is Skiatook tap water safe to drink?
EPA testing detected 21 contaminants in the water serving Skiatook. 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 Skiatook?
2 public water suppliers report drinking-water monitoring for Skiatook, Oklahoma to the EPA. Each is listed above with its population served.
What contaminants are in Skiatook's water?
The contaminants EPA monitoring detected in Skiatook include Fluoride, Nitrate-Nitrite, Copper, TTHM, Chloroform. 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.