What was found in Ponca 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 | 1010 µg/L 10% of the EPA limit 10000 µg/L Main supplier: PONCA CITY MUN WATER · 27,155 people · 2019
Highest in the city: 5410 µg/L — Ponca Tribe Of Oklahoma · 360 people · 2019 | 2/4 | SYR4 |
| Fluoride | 930 µg/L 23% of the EPA limit 4000 µg/L Main supplier: PONCA CITY MUN WATER · 27,155 people · 2019 | 2/4 | SYR4 |
| Copper | 602.6 µg/L 46% of the EPA limit 1300 µg/L Main supplier: PONCA CITY MUN WATER · 27,155 people · 2019 | 3/4 | SYR4 |
| Barium | 80.75 µg/L 4% of the EPA limit 2000 µg/L Main supplier: PONCA CITY MUN WATER · 27,155 people · 2019
Highest in the city: 176.9 µg/L — Ponca Tribe Of Oklahoma · 360 people · 2019 | 2/4 | SYR4 |
| TTHM | 78.65 µg/L 98% of the EPA limit 80 µg/L Main supplier: PONCA CITY MUN WATER · 27,155 people · 2019 | 3/4 | SYR4 |
| Lead | 31.8 µg/L 212% of the EPA limit, at the 95th percentile of samples — 15 µg/L Highest in the city: KAY CO RWD #3 · 1,000 people · 2017 | 2/4 | SYR4 |
| Dibromochloromethane | 28.12 µg/L No EPA limit set Main supplier: PONCA CITY MUN WATER · 27,155 people · 2019 | 3/4 | SYR4 |
| Bromoform | 25.84 µg/L No EPA limit set Main supplier: PONCA CITY MUN WATER · 27,155 people · 2019 | 3/4 | SYR4 |
| Lithium | 19.4 µg/L No EPA limit set Main supplier: PONCA CITY MUN WATER · 27,155 people · 2024 | 1/4 | UCMR-5 |
| Bromodichloromethane | 17.78 µg/L No EPA limit set Main supplier: PONCA CITY MUN WATER · 27,155 people · 2019 | 3/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 13.675 µg/L 23% of the EPA limit 60 µg/L Main supplier: PONCA CITY MUN WATER · 27,155 people · 2019 | 3/4 | SYR4 |
| Chloroform | 9.12 µg/L No EPA limit set Main supplier: PONCA CITY MUN WATER · 27,155 people · 2019 | 3/4 | SYR4 |
| Dibromoacetic Acid | 8.1165 µg/L No EPA limit set Main supplier: PONCA CITY MUN WATER · 27,155 people · 2019 | 3/4 | SYR4 |
| Gross Beta Particle Activity | 7.36 pCi/L No EPA limit set Main supplier: PONCA CITY MUN WATER · 27,155 people · 2018 | 2/4 | SYR4 |
| Selenium | 5.4 µg/L 11% of the EPA limit 50 µg/L Main supplier: PONCA CITY MUN WATER · 27,155 people · 2019 | 1/4 | SYR4 |
| Gross Alpha, Excl. Radon And U | 4.802 pCi/L 32% of the EPA limit 15 pCi/L Main supplier: PONCA CITY MUN WATER · 27,155 people · 2018 | 2/4 | SYR4 |
| Dichloroacetic Acid | 4.244 µg/L No EPA limit set Main supplier: PONCA CITY MUN WATER · 27,155 people · 2019 | 3/4 | SYR4 |
| Combined Uranium | 2.48 µg/L 8.3% of the EPA limit 30 µg/L Main supplier: PONCA CITY MUN WATER · 27,155 people · 2018 | 1/4 | SYR4 |
| Trichloroacetic Acid | 2.246 µg/L No EPA limit set Main supplier: PONCA CITY MUN WATER · 27,155 people · 2019 | 3/4 | SYR4 |
| Monobromoacetic Acid | 1.802 µg/L No EPA limit set Main supplier: PONCA CITY MUN WATER · 27,155 people · 2019 | 3/4 | SYR4 |
| Combined Radium (-226 And -228) | 1.2195 pCi/L 24% of the EPA limit 5 pCi/L Main supplier: PONCA CITY MUN WATER · 27,155 people · 2018
Highest in the city: 1.77 pCi/L — Ponca Tribe Of Oklahoma · 360 people · 2019 | 2/4 | SYR4 |
| Dichloromethane | 0.5800 µg/L 12% of the EPA limit 5 µg/L Main supplier: PONCA CITY MUN WATER · 27,155 people · 2019 | 1/4 | SYR4 |
| PFOS | 0.0081 µg/L No EPA limit set Main supplier: PONCA CITY MUN WATER · 27,155 people · 2024 | 1/4 | UCMR-5 |
| PFHXS | 0.0067 µg/L No EPA limit set Main supplier: PONCA CITY MUN WATER · 27,155 people · 2024 | 1/4 | UCMR-5 |
| PFBS | 0.0053 µg/L No EPA limit set Main supplier: PONCA CITY MUN WATER · 27,155 people · 2024 | 1/4 | UCMR-5 |
| 9Cl-PF3ONS | 0.0034 µg/L No EPA limit set Main supplier: PONCA CITY MUN WATER · 27,155 people · 2024 | 1/4 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: PONCA CITY MUN WATER · 27,155 people · 2025
Highest in the city: 0.0010 mg/L — Ponca Tribe Of Oklahoma · 360 people · 2024 | 4/4 | 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 Ponca City
| Supplier | Population served |
|---|---|
| PONCA CITY MUN WATER | 27,155 |
| KAY CO RWD #1 | 1,765 |
| KAY CO RWD #3 | 1,000 |
| Ponca Tribe Of Oklahoma | 360 |
Frequently asked questions about Ponca City tap water
Is Ponca City tap water safe to drink?
EPA testing detected 27 contaminants in the water serving Ponca 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 Ponca City?
4 public water suppliers report drinking-water monitoring for Ponca City, Oklahoma to the EPA. Each is listed above with its population served.
What contaminants are in Ponca City's water?
The contaminants EPA monitoring detected in Ponca City include Nitrate-Nitrite, Fluoride, Copper, Barium, 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.