What was found in Madill'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 | 290 µg/L 2.9% of the EPA limit 10000 µg/L Main supplier: MADILL · 3,410 people · 2019
Highest in the city: 8680 µg/L — OAKVIEW WATER CORP · 925 people · 2019 | 3/5 | SYR4 |
| Fluoride | 1052.5 µg/L 26% of the EPA limit 4000 µg/L Main supplier: MADILL · 3,410 people · 2019
Highest in the city: 1270 µg/L — OAKVIEW WATER CORP · 925 people · 2015 | 2/5 | SYR4 |
| Copper | 295.2 µg/L 23% of the EPA limit 1300 µg/L Main supplier: MADILL · 3,410 people · 2017
Highest in the city: 632.48 µg/L — CARDINAL HILL SUBDIVISION · 475 people · 2018 | 5/5 | SYR4 |
| TTHM | 109 µg/L 136% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: MADILL · 3,410 people · 2019
Highest in the city: 203.9 µg/L — TEXOMA HILLS · 212 people · 2019 | 4/5 | SYR4 |
| Chloroform | 83.46 µg/L No EPA limit set Main supplier: MADILL · 3,410 people · 2019
Highest in the city: 178.248 µg/L — TEXOMA HILLS · 212 people · 2019 | 4/5 | SYR4 |
| Barium | 105.8 µg/L 5.3% of the EPA limit 2000 µg/L Highest in the city: OAKVIEW WATER CORP · 925 people · 2015 | 2/5 | SYR4 |
| Total Haloacetic Acids (HAA5) | 71.2 µg/L 119% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: MADILL · 3,410 people · 2019
Highest in the city: 72.15 µg/L — OAKLAND PWA · 1,050 people · 2019 | 4/5 | SYR4 |
| Trichloroacetic Acid | 38.21 µg/L No EPA limit set Main supplier: MADILL · 3,410 people · 2019 | 3/5 | SYR4 |
| Dichloroacetic Acid | 32.23 µg/L No EPA limit set Main supplier: MADILL · 3,410 people · 2019
Highest in the city: 36.48 µg/L — OAKLAND PWA · 1,050 people · 2019 | 3/5 | SYR4 |
| Bromodichloromethane | 22.28 µg/L No EPA limit set Main supplier: MADILL · 3,410 people · 2019 | 3/5 | SYR4 |
| Lead | 11 µg/L 73% of the EPA limit 15 µg/L Main supplier: MADILL · 3,410 people · 2017
Highest in the city: 16.84 µg/L — TEXOMA HILLS · 212 people · 2019 | 5/5 | SYR4 |
| Dibromochloromethane | 5.656 µg/L No EPA limit set Main supplier: MADILL · 3,410 people · 2019
Highest in the city: 8.372 µg/L — TEXOMA HILLS · 212 people · 2019 | 4/5 | SYR4 |
| Monochloroacetic Acid | 7.911 µg/L No EPA limit set Main supplier: MADILL · 3,410 people · 2019 | 3/5 | SYR4 |
| Gross Beta Particle Activity | 3.861 pCi/L No EPA limit set Main supplier: MADILL · 3,410 people · 2019
Highest in the city: 4.3265 pCi/L — OAKVIEW WATER CORP · 925 people · 2019 | 3/5 | SYR4 |
| Arsenic | 3.43 µg/L 34% of the EPA limit 10 µg/L Highest in the city: CARDINAL HILL SUBDIVISION · 475 people · 2017 | 2/5 | SYR4 |
| Antimony, Total | 3.1675 µg/L 53% of the EPA limit 6 µg/L Highest in the city: OAKVIEW WATER CORP · 925 people · 2015 | 2/5 | SYR4 |
| Bromoform | 2.968 µg/L No EPA limit set Highest in the city: TEXOMA HILLS · 212 people · 2019 | 2/5 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1.06 pCi/L 7.1% of the EPA limit 15 pCi/L Main supplier: MADILL · 3,410 people · 2019
Highest in the city: 2.789 pCi/L — OAKVIEW WATER CORP · 925 people · 2019 | 3/5 | SYR4 |
| Dibromoacetic Acid | 1.3295 µg/L No EPA limit set Main supplier: MADILL · 3,410 people · 2019
Highest in the city: 2.724 µg/L — OAKLAND PWA · 1,050 people · 2019 | 2/5 | SYR4 |
| Selenium | 2.07 µg/L 4.1% of the EPA limit 50 µg/L Highest in the city: CARDINAL HILL SUBDIVISION · 475 people · 2014 | 2/5 | SYR4 |
| Chromium | 2 µg/L 2% of the EPA limit 100 µg/L Highest in the city: CARDINAL HILL SUBDIVISION · 475 people · 2014 | 1/5 | SYR4 |
| Monobromoacetic Acid | 1.694 µg/L No EPA limit set Main supplier: MADILL · 3,410 people · 2019 | 2/5 | SYR4 |
| Combined Radium (-226 And -228) | 0.7169 pCi/L 14% of the EPA limit 5 pCi/L Main supplier: MADILL · 3,410 people · 2019
Highest in the city: 1.1904 pCi/L — OAKVIEW WATER CORP · 925 people · 2019 | 3/5 | SYR4 |
| Combined Uranium | 1.03 µg/L 3.4% of the EPA limit 30 µg/L Highest in the city: CARDINAL HILL SUBDIVISION · 475 people · 2015 | 1/5 | SYR4 |
| Lead | 0.0017 mg/L 11% of the EPA limit 0.0150 mg/L Main supplier: MADILL · 3,410 people · 2023
Highest in the city: 0.0024 mg/L — OAKVIEW WATER CORP · 925 people · 2025 | 5/5 | 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 Madill
| Supplier | Population served |
|---|---|
| MADILL | 3,410 |
| OAKLAND PWA | 1,050 |
| OAKVIEW WATER CORP | 925 |
| CARDINAL HILL SUBDIVISION | 475 |
| TEXOMA HILLS | 212 |
Frequently asked questions about Madill tap water
Is Madill tap water safe to drink?
EPA testing detected 25 contaminants in the water serving Madill. 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 Madill?
5 public water suppliers report drinking-water monitoring for Madill, Oklahoma to the EPA. Each is listed above with its population served.
What contaminants are in Madill's water?
The contaminants EPA monitoring detected in Madill include Nitrate-Nitrite, Fluoride, Copper, TTHM, Chloroform. 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.