What was found in Elk City'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 |
|---|---|---|---|
| Nitrate-Nitrite | 6960 µg/L 70% of the EPA limit 10000 µg/L Main supplier: ELK CITY · 10,510 people · 2019
Highest in the city: 8367.5 µg/L — POTTERS TRAILER PARK · 150 people · 2019 | 3/3 | SYR4 |
| Nitrate | 6850 µg/L 69% of the EPA limit 10000 µg/L Highest in the city: POTTERS TRAILER PARK · 150 people · 2017 | 1/3 | SYR4 |
| Copper | 523.235 µg/L 40% of the EPA limit 1300 µg/L Main supplier: ELK CITY · 10,510 people · 2017 | 3/3 | SYR4 |
| Fluoride | 247.5 µg/L 6.2% of the EPA limit 4000 µg/L Main supplier: ELK CITY · 10,510 people · 2018
Highest in the city: 405.5 µg/L — POTTERS TRAILER PARK · 150 people · 2018 | 3/3 | SYR4 |
| Barium | 73.27 µg/L 3.7% of the EPA limit 2000 µg/L Main supplier: ELK CITY · 10,510 people · 2018
Highest in the city: 304.25 µg/L — BECKHAM CO RWD # 3 · 1,617 people · 2018 | 3/3 | SYR4 |
| TTHM | 44.13 µg/L 55% of the EPA limit 80 µg/L Main supplier: ELK CITY · 10,510 people · 2019 | 2/3 | SYR4 |
| Lead | 6.375 µg/L 43% of the EPA limit 15 µg/L Main supplier: ELK CITY · 10,510 people · 2017
Highest in the city: 39.76 µg/L — BECKHAM CO RWD # 3 · 1,617 people · 2018 | 2/3 | SYR4 |
| Lithium | 17.94 µg/L No EPA limit set Main supplier: ELK CITY · 10,510 people · 2023 | 1/3 | UCMR-5 |
| Dibromochloromethane | 13.875 µg/L No EPA limit set Main supplier: ELK CITY · 10,510 people · 2019 | 2/3 | SYR4 |
| Chloroform | 6.0825 µg/L No EPA limit set Main supplier: ELK CITY · 10,510 people · 2019
Highest in the city: 11.2 µg/L — BECKHAM CO RWD # 3 · 1,617 people · 2019 | 2/3 | SYR4 |
| Bromodichloromethane | 10.025 µg/L No EPA limit set Main supplier: ELK CITY · 10,510 people · 2019 | 2/3 | SYR4 |
| Bromoform | 8.35 µg/L No EPA limit set Main supplier: ELK CITY · 10,510 people · 2019 | 2/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 7.285 µg/L 12% of the EPA limit 60 µg/L Main supplier: ELK CITY · 10,510 people · 2019 | 1/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1.03 pCi/L 6.9% of the EPA limit 15 pCi/L Main supplier: ELK CITY · 10,510 people · 2014
Highest in the city: 6.771 pCi/L — POTTERS TRAILER PARK · 150 people · 2019 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 3.974 pCi/L No EPA limit set Main supplier: ELK CITY · 10,510 people · 2014
Highest in the city: 5.72 pCi/L — POTTERS TRAILER PARK · 150 people · 2019 | 3/3 | SYR4 |
| Arsenic | 1.1 µg/L 11% of the EPA limit 10 µg/L Main supplier: ELK CITY · 10,510 people · 2018
Highest in the city: 3.36 µg/L — BECKHAM CO RWD # 3 · 1,617 people · 2018 | 2/3 | SYR4 |
| Dibromoacetic Acid | 3.121 µg/L No EPA limit set Main supplier: ELK CITY · 10,510 people · 2019 | 2/3 | SYR4 |
| Dichloroacetic Acid | 2.84 µg/L No EPA limit set Main supplier: ELK CITY · 10,510 people · 2019 | 2/3 | SYR4 |
| Combined Uranium | 1.8 µg/L 6% of the EPA limit 30 µg/L Main supplier: ELK CITY · 10,510 people · 2014
Highest in the city: 2.6355 µg/L — POTTERS TRAILER PARK · 150 people · 2019 | 3/3 | SYR4 |
| Combined Radium (-226 And -228) | 1.225 pCi/L 25% of the EPA limit 5 pCi/L Main supplier: ELK CITY · 10,510 people · 2014
Highest in the city: 1.999 pCi/L — POTTERS TRAILER PARK · 150 people · 2019 | 3/3 | SYR4 |
| Selenium | 1.8 µg/L 3.6% of the EPA limit 50 µg/L Main supplier: ELK CITY · 10,510 people · 2018 | 1/3 | SYR4 |
| Monochloroacetic Acid | 1.7085 µg/L No EPA limit set Main supplier: ELK CITY · 10,510 people · 2019 | 1/3 | SYR4 |
| Chromium | 1.4 µg/L 1.4% of the EPA limit 100 µg/L Main supplier: ELK CITY · 10,510 people · 2018 | 1/3 | SYR4 |
| Trichloroacetic Acid | 1.04 µg/L No EPA limit set Main supplier: ELK CITY · 10,510 people · 2019 | 1/3 | SYR4 |
| Tetrachloroethylene | 0.5000 µg/L 10% of the EPA limit 5 µg/L Highest in the city: BECKHAM CO RWD # 3 · 1,617 people · 2019 | 1/3 | SYR4 |
| Lead | 0.0024 mg/L 16% of the EPA limit 0.0150 mg/L Main supplier: ELK CITY · 10,510 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 Elk City
| Supplier | Population served |
|---|---|
| ELK CITY | 10,510 |
| BECKHAM CO RWD # 3 | 1,617 |
| POTTERS TRAILER PARK | 150 |
Frequently asked questions about Elk City tap water
Is Elk City tap water safe to drink?
EPA testing detected 26 contaminants in the water serving Elk 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 Elk City?
3 public water suppliers report drinking-water monitoring for Elk City, Oklahoma to the EPA. Each is listed above with its population served.
What contaminants are in Elk City's water?
The contaminants EPA monitoring detected in Elk City include Nitrate-Nitrite, Nitrate, Copper, Fluoride, Barium. 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.