What was found in Ardmore'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 | 525 µg/L 5.3% of the EPA limit 10000 µg/L Main supplier: ARDMORE · 24,893 people · 2019
Highest in the city: 2812.5 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 3/3 | SYR4 |
| Fluoride | 390 µg/L 9.8% of the EPA limit 4000 µg/L Main supplier: ARDMORE · 24,893 people · 2013
Highest in the city: 933.5 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 3/3 | SYR4 |
| Chlorite | 824 µg/L 82% of the EPA limit 1000 µg/L Highest in the city: SOUTHERN OKLA WATER CORP · 11,250 people · 2016 | 1/3 | SYR4 |
| Copper | 77.545 µg/L 6% of the EPA limit 1300 µg/L Main supplier: ARDMORE · 24,893 people · 2019
Highest in the city: 450.448 µg/L — GOLDEN OAKS HOME OWNERS ASSN · 135 people · 2019 | 3/3 | SYR4 |
| TTHM | 103.19 µg/L 129% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: ARDMORE · 24,893 people · 2019
Highest in the city: 169.25 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 3/3 | SYR4 |
| Barium | 62.8 µg/L 3.1% of the EPA limit 2000 µg/L Main supplier: ARDMORE · 24,893 people · 2013
Highest in the city: 136 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 73.96 µg/L 123% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: ARDMORE · 24,893 people · 2019
Highest in the city: 104.4 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 2/3 | SYR4 |
| Chloroform | 86.515 µg/L No EPA limit set Main supplier: ARDMORE · 24,893 people · 2019
Highest in the city: 97.31 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 2/3 | SYR4 |
| Trichloroacetic Acid | 45.41 µg/L No EPA limit set Main supplier: ARDMORE · 24,893 people · 2019
Highest in the city: 56.21 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 2/3 | SYR4 |
| Lithium | 46.4 µg/L No EPA limit set Highest in the city: SOUTHERN OKLA WATER CORP · 11,250 people · 2025 | 1/3 | UCMR-5 |
| Dichloroacetic Acid | 29.55 µg/L No EPA limit set Main supplier: ARDMORE · 24,893 people · 2019
Highest in the city: 45.81 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 2/3 | SYR4 |
| Bromodichloromethane | 22.145 µg/L No EPA limit set Main supplier: ARDMORE · 24,893 people · 2019
Highest in the city: 40.44 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 2/3 | SYR4 |
| Lead | 4.361 µg/L 29% of the EPA limit 15 µg/L Main supplier: ARDMORE · 24,893 people · 2019
Highest in the city: 30.54 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2018 | 3/3 | SYR4 |
| Dibromochloromethane | 16.44 µg/L No EPA limit set Main supplier: ARDMORE · 24,893 people · 2019
Highest in the city: 28.04 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 3/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1.6765 pCi/L 11% of the EPA limit 15 pCi/L Main supplier: ARDMORE · 24,893 people · 2019
Highest in the city: 9.64 pCi/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 6.4705 pCi/L No EPA limit set Main supplier: ARDMORE · 24,893 people · 2019
Highest in the city: 7.316 pCi/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 3/3 | SYR4 |
| Bromoform | 1.745 µg/L No EPA limit set Main supplier: ARDMORE · 24,893 people · 2019
Highest in the city: 7.055 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 3.39 µg/L No EPA limit set Main supplier: ARDMORE · 24,893 people · 2019
Highest in the city: 6.74 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 2/3 | SYR4 |
| Dibromoacetic Acid | 3.8915 µg/L No EPA limit set Main supplier: ARDMORE · 24,893 people · 2019
Highest in the city: 6.296 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 2/3 | SYR4 |
| Combined Uranium | 1.68 µg/L 5.6% of the EPA limit 30 µg/L Main supplier: ARDMORE · 24,893 people · 2019
Highest in the city: 4.673 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 3/3 | SYR4 |
| Arsenic | 4.622 µg/L 46% of the EPA limit 10 µg/L Highest in the city: SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 2/3 | SYR4 |
| Chromium | 3.95 µg/L 4% of the EPA limit 100 µg/L Highest in the city: SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 1/3 | SYR4 |
| Monobromoacetic Acid | 1.404 µg/L No EPA limit set Main supplier: ARDMORE · 24,893 people · 2019
Highest in the city: 3.2585 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 2/3 | SYR4 |
| Combined Radium (-226 And -228) | 3.2225 pCi/L 64% of the EPA limit 5 pCi/L Highest in the city: SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 2/3 | SYR4 |
| Selenium | 1 µg/L 2% of the EPA limit 50 µg/L Highest in the city: SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 1/3 | SYR4 |
| Toluene | 0.9345 µg/L 0.1% of the EPA limit 1000 µg/L Highest in the city: SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 1/3 | SYR4 |
| Dichloromethane | 0.6000 µg/L 12% of the EPA limit 5 µg/L Main supplier: ARDMORE · 24,893 people · 2018 | 1/3 | SYR4 |
| Mercury | 0.2140 µg/L 11% of the EPA limit 2 µg/L Highest in the city: SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 1/3 | SYR4 |
| 2,4-D | 0.1600 µg/L 0.2% of the EPA limit 70 µg/L Main supplier: ARDMORE · 24,893 people · 2019 | 1/3 | SYR4 |
| 6:2 Fts | 0.0112 µg/L No EPA limit set Highest in the city: SOUTHERN OKLA WATER CORP · 11,250 people · 2025 | 1/3 | UCMR-5 |
| Pfba | 0.0064 µg/L No EPA limit set Highest in the city: SOUTHERN OKLA WATER CORP · 11,250 people · 2025 | 1/3 | UCMR-5 |
| Pfpea | 0.0052 µg/L No EPA limit set Highest in the city: SOUTHERN OKLA WATER CORP · 11,250 people · 2025 | 1/3 | UCMR-5 |
| Pfhxa | 0.0034 µg/L No EPA limit set Highest in the city: SOUTHERN OKLA WATER CORP · 11,250 people · 2025 | 1/3 | UCMR-5 |
| Lead | 0.00067 mg/L 4.5% of the EPA limit 0.0150 mg/L Main supplier: ARDMORE · 24,893 people · 2026
Highest in the city: 0.0029 mg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2024 | 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 Ardmore
| Supplier | Population served |
|---|---|
| ARDMORE | 24,893 |
| SOUTHERN OKLA WATER CORP | 11,250 |
| GOLDEN OAKS HOME OWNERS ASSN | 135 |
Frequently asked questions about Ardmore tap water
Is Ardmore tap water safe to drink?
EPA testing detected 34 contaminants in the water serving Ardmore. 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 Ardmore?
3 public water suppliers report drinking-water monitoring for Ardmore, Oklahoma to the EPA. Each is listed above with its population served.
What contaminants are in Ardmore's water?
The contaminants EPA monitoring detected in Ardmore include Nitrate-Nitrite, Fluoride, Chlorite, 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.