What was found in Enid'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 | 9210 µg/L 92% of the EPA limit 10000 µg/L Main supplier: ENID · 49,347 people · 2019 | 1/6 | SYR4 |
| Nitrate-Nitrite | 8724 µg/L 87% of the EPA limit 10000 µg/L Main supplier: ENID · 49,347 people · 2019 | 3/6 | SYR4 |
| Copper | 877.35 µg/L 67% of the EPA limit 1300 µg/L Main supplier: ENID · 49,347 people · 2018
Highest in the city: 1196 µg/L — GARFIELD CO RWD #7 · 288 people · 2019 | 6/6 | SYR4 |
| Fluoride | 740 µg/L 19% of the EPA limit 4000 µg/L Main supplier: ENID · 49,347 people · 2017 | 2/6 | SYR4 |
| Barium | 378.8 µg/L 19% of the EPA limit 2000 µg/L Main supplier: ENID · 49,347 people · 2017
Highest in the city: 496.8 µg/L — HIGHPOINT MHP · 600 people · 2017 | 3/6 | SYR4 |
| TTHM | 63.19 µg/L 79% of the EPA limit 80 µg/L Main supplier: ENID · 49,347 people · 2019 | 6/6 | SYR4 |
| Lead | 20.57 µg/L 137% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: ENID · 49,347 people · 2018
Highest in the city: 56.895 µg/L — VANCE AFB · 3,231 people · 2019 | 4/6 | SYR4 |
| Lithium | 36.5 µg/L No EPA limit set Main supplier: ENID · 49,347 people · 2024 | 1/6 | UCMR-5 |
| Bromoform | 10.855 µg/L No EPA limit set Main supplier: ENID · 49,347 people · 2019
Highest in the city: 23.9 µg/L — VANCE AFB · 3,231 people · 2019 | 6/6 | SYR4 |
| Selenium | 22.2 µg/L 44% of the EPA limit 50 µg/L Highest in the city: BRECKINRIDGE PWA · 239 people · 2018 | 1/6 | SYR4 |
| Dibromochloromethane | 18.435 µg/L No EPA limit set Main supplier: ENID · 49,347 people · 2019 | 6/6 | SYR4 |
| Chloroform | 16.275 µg/L No EPA limit set Main supplier: ENID · 49,347 people · 2019 | 6/6 | SYR4 |
| Bromodichloromethane | 15.525 µg/L No EPA limit set Main supplier: ENID · 49,347 people · 2019 | 6/6 | SYR4 |
| Gross Beta Particle Activity | 5.893 pCi/L No EPA limit set Main supplier: ENID · 49,347 people · 2018
Highest in the city: 12.031 pCi/L — HIGHPOINT MHP · 600 people · 2019 | 2/6 | SYR4 |
| Total Haloacetic Acids (HAA5) | 9.897 µg/L 16% of the EPA limit 60 µg/L Main supplier: ENID · 49,347 people · 2019 | 6/6 | SYR4 |
| Chromium | 8.8 µg/L 8.8% of the EPA limit 100 µg/L Highest in the city: BRECKINRIDGE PWA · 239 people · 2018 | 1/6 | SYR4 |
| Tetrachloroethylene | 7.0135 µg/L 140% of the EPA limit, at the 95th percentile of samples — 5 µg/L Highest in the city: HIGHPOINT MHP · 600 people · 2019 | 1/6 | SYR4 |
| Gross Alpha, Excl. Radon And U | 4.0675 pCi/L 27% of the EPA limit 15 pCi/L Main supplier: ENID · 49,347 people · 2018
Highest in the city: 6.8135 pCi/L — HIGHPOINT MHP · 600 people · 2019 | 3/6 | SYR4 |
| Dichloroacetic Acid | 6.358 µg/L No EPA limit set Main supplier: ENID · 49,347 people · 2019 | 4/6 | SYR4 |
| Arsenic | 5.095 µg/L 51% of the EPA limit 10 µg/L Main supplier: ENID · 49,347 people · 2017
Highest in the city: 6.16 µg/L — BRECKINRIDGE PWA · 239 people · 2019 | 2/6 | SYR4 |
| Dibromoacetic Acid | 4.189 µg/L No EPA limit set Main supplier: ENID · 49,347 people · 2019
Highest in the city: 4.665 µg/L — BRECKINRIDGE PWA · 239 people · 2018 | 6/6 | SYR4 |
| Combined Uranium | 3.637 µg/L 12% of the EPA limit 30 µg/L Main supplier: ENID · 49,347 people · 2018 | 2/6 | SYR4 |
| Trichloroacetic Acid | 3.02 µg/L No EPA limit set Main supplier: ENID · 49,347 people · 2019 | 2/6 | SYR4 |
| Monobromoacetic Acid | 2.346 µg/L No EPA limit set Main supplier: ENID · 49,347 people · 2019 | 1/6 | SYR4 |
| Combined Radium (-226 And -228) | 1.99 pCi/L 40% of the EPA limit 5 pCi/L Main supplier: ENID · 49,347 people · 2018 | 2/6 | SYR4 |
| Thallium, Total | 1 µg/L 50% of the EPA limit 2 µg/L Highest in the city: HIGHPOINT MHP · 600 people · 2017 | 1/6 | SYR4 |
| 1,2-Dichloroethane | 0.6100 µg/L 12% of the EPA limit 5 µg/L Highest in the city: HIGHPOINT MHP · 600 people · 2019 | 1/6 | SYR4 |
| Lead | 0.0051 mg/L 34% of the EPA limit 0.0150 mg/L Main supplier: ENID · 49,347 people · 2024
Highest in the city: 0.0107 mg/L — HIGHPOINT MHP · 600 people · 2023 | 6/6 | 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 Enid
| Supplier | Population served |
|---|---|
| ENID | 49,347 |
| VANCE AFB | 3,231 |
| HIGHPOINT MHP | 600 |
| GARFIELD CO RWD # 4 | 334 |
| GARFIELD CO RWD #7 | 288 |
| BRECKINRIDGE PWA | 239 |
Frequently asked questions about Enid tap water
Is Enid tap water safe to drink?
EPA testing detected 28 contaminants in the water serving Enid. 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 Enid?
6 public water suppliers report drinking-water monitoring for Enid, Oklahoma to the EPA. Each is listed above with its population served.
What contaminants are in Enid's water?
The contaminants EPA monitoring detected in Enid include Nitrate, Nitrate-Nitrite, 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.