What was found in Atoka'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 | 1038 µg/L 26% of the EPA limit 4000 µg/L Highest in the city: ATOKA · 2,988 people · 2018 | 1/3 | SYR4 |
| Chlorite | 125 µg/L 13% of the EPA limit 1000 µg/L Main supplier: ATOKA CO. RWS & SWMD #4 · 3,000 people · 2019
Highest in the city: 731.45 µg/L — ATOKA · 2,988 people · 2019 | 2/3 | SYR4 |
| Nitrate-Nitrite | 520 µg/L 5.2% of the EPA limit 10000 µg/L Main supplier: ATOKA CO. RWS & SWMD #4 · 3,000 people · 2019
Highest in the city: 620 µg/L — ATOKA · 2,988 people · 2019 | 3/3 | SYR4 |
| Copper | 365 µg/L 28% of the EPA limit 1300 µg/L Main supplier: ATOKA CO. RWS & SWMD #4 · 3,000 people · 2019
Highest in the city: 374.35 µg/L — HOWARD MCLEOD CORRECTIONAL CENTER · 825 people · 2019 | 3/3 | SYR4 |
| TTHM | 214.82 µg/L 269% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: ATOKA CO. RWS & SWMD #4 · 3,000 people · 2019 | 3/3 | SYR4 |
| Chloroform | 208 µg/L No EPA limit set Main supplier: ATOKA CO. RWS & SWMD #4 · 3,000 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 197.92 µg/L 330% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: ATOKA CO. RWS & SWMD #4 · 3,000 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 115.1 µg/L No EPA limit set Main supplier: ATOKA CO. RWS & SWMD #4 · 3,000 people · 2019 | 3/3 | SYR4 |
| Barium | 12.8 µg/L 0.6% of the EPA limit 2000 µg/L Main supplier: ATOKA CO. RWS & SWMD #4 · 3,000 people · 2013
Highest in the city: 99 µg/L — HOWARD MCLEOD CORRECTIONAL CENTER · 825 people · 2014 | 3/3 | SYR4 |
| Dichloroacetic Acid | 90.41 µg/L No EPA limit set Main supplier: ATOKA CO. RWS & SWMD #4 · 3,000 people · 2019 | 2/3 | SYR4 |
| Lead | 11.7 µg/L 78% of the EPA limit 15 µg/L Main supplier: ATOKA CO. RWS & SWMD #4 · 3,000 people · 2019
Highest in the city: 27.281 µg/L — HOWARD MCLEOD CORRECTIONAL CENTER · 825 people · 2019 | 3/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 16.8755 pCi/L 113% of the EPA limit, at the 95th percentile of samples — 15 pCi/L Highest in the city: HOWARD MCLEOD CORRECTIONAL CENTER · 825 people · 2019 | 2/3 | SYR4 |
| Bromodichloromethane | 12.74 µg/L No EPA limit set Main supplier: ATOKA CO. RWS & SWMD #4 · 3,000 people · 2019
Highest in the city: 15.275 µg/L — ATOKA · 2,988 people · 2019 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 14.87 pCi/L No EPA limit set Highest in the city: HOWARD MCLEOD CORRECTIONAL CENTER · 825 people · 2019 | 2/3 | SYR4 |
| Monochloroacetic Acid | 9.026 µg/L No EPA limit set Main supplier: ATOKA CO. RWS & SWMD #4 · 3,000 people · 2019 | 2/3 | SYR4 |
| Dibromochloromethane | 2.133 µg/L No EPA limit set Main supplier: ATOKA CO. RWS & SWMD #4 · 3,000 people · 2019
Highest in the city: 4.907 µg/L — HOWARD MCLEOD CORRECTIONAL CENTER · 825 people · 2019 | 3/3 | SYR4 |
| P-Dichlorobenzene | 4.554 µg/L 6.1% of the EPA limit 75 µg/L Main supplier: ATOKA CO. RWS & SWMD #4 · 3,000 people · 2019 | 1/3 | SYR4 |
| Bromoform | 1.0055 µg/L No EPA limit set Main supplier: ATOKA CO. RWS & SWMD #4 · 3,000 people · 2019
Highest in the city: 4.372 µg/L — HOWARD MCLEOD CORRECTIONAL CENTER · 825 people · 2019 | 2/3 | SYR4 |
| Dibromoacetic Acid | 2.7145 µg/L No EPA limit set Highest in the city: HOWARD MCLEOD CORRECTIONAL CENTER · 825 people · 2019 | 2/3 | SYR4 |
| Monobromoacetic Acid | 2.577 µg/L No EPA limit set Main supplier: ATOKA CO. RWS & SWMD #4 · 3,000 people · 2019 | 2/3 | SYR4 |
| Combined Radium (-226 And -228) | 0.8090 pCi/L 16% of the EPA limit 5 pCi/L Main supplier: ATOKA CO. RWS & SWMD #4 · 3,000 people · 2019
Highest in the city: 2.1405 pCi/L — HOWARD MCLEOD CORRECTIONAL CENTER · 825 people · 2019 | 3/3 | SYR4 |
| Antimony, Total | 1.62 µg/L 27% of the EPA limit 6 µg/L Highest in the city: HOWARD MCLEOD CORRECTIONAL CENTER · 825 people · 2014 | 1/3 | SYR4 |
| Selenium | 1.54 µg/L 3.1% of the EPA limit 50 µg/L Highest in the city: HOWARD MCLEOD CORRECTIONAL CENTER · 825 people · 2014 | 1/3 | SYR4 |
| Thallium, Total | 0.6490 µg/L 32% of the EPA limit 2 µg/L Highest in the city: HOWARD MCLEOD CORRECTIONAL CENTER · 825 people · 2014 | 1/3 | SYR4 |
| Lead | 0.0011 mg/L 7.5% of the EPA limit 0.0150 mg/L Main supplier: ATOKA CO. RWS & SWMD #4 · 3,000 people · 2024
Highest in the city: 0.0013 mg/L — ATOKA · 2,988 people · 2023 | 3/3 | 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 Atoka
| Supplier | Population served |
|---|---|
| ATOKA CO. RWS & SWMD #4 | 3,000 |
| ATOKA | 2,988 |
| HOWARD MCLEOD CORRECTIONAL CENTER | 825 |
Frequently asked questions about Atoka tap water
Is Atoka tap water safe to drink?
EPA testing detected 25 contaminants in the water serving Atoka. 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 Atoka?
3 public water suppliers report drinking-water monitoring for Atoka, Oklahoma to the EPA. Each is listed above with its population served.
What contaminants are in Atoka's water?
The contaminants EPA monitoring detected in Atoka include Fluoride, Chlorite, Nitrate-Nitrite, Copper, TTHM. 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.