What was found in Mcalester'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 |
|---|---|---|---|
| Fluoride | 1022.5 µg/L 26% of the EPA limit 4000 µg/L Highest in the city: US ARMY AMMUNITION PLANT · 1,872 people · 2019 | 2/10 | SYR4 |
| Copper | 553 µg/L 43% of the EPA limit 1300 µg/L Main supplier: MCALESTER PWA · 18,206 people · 2019
Highest in the city: 977.836 µg/L — PITTSBURG CO. RWD #14 · 1,680 people · 2019 | 10/10 | SYR4 |
| Nitrate-Nitrite | 274 µg/L 2.7% of the EPA limit 10000 µg/L Main supplier: MCALESTER PWA · 18,206 people · 2019
Highest in the city: 420 µg/L — PITTSBURG CO. RWD #14 · 1,680 people · 2019 | 3/10 | SYR4 |
| TTHM | 125 µg/L 156% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: MCALESTER PWA · 18,206 people · 2019
Highest in the city: 186.9 µg/L — PITTSBURG CO. RWD #14 · 1,680 people · 2019 | 10/10 | SYR4 |
| Chloroform | 106.35 µg/L No EPA limit set Main supplier: MCALESTER PWA · 18,206 people · 2019
Highest in the city: 161.68 µg/L — PITTSBURG CO. RWD #14 · 1,680 people · 2019 | 10/10 | SYR4 |
| Total Haloacetic Acids (HAA5) | 71 µg/L 118% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: MCALESTER PWA · 18,206 people · 2019
Highest in the city: 111.5 µg/L — PITTSBURG CO. RWD #14 · 1,680 people · 2019 | 10/10 | SYR4 |
| Lead | 63.965 µg/L 426% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: MCALESTER PWA · 18,206 people · 2019 | 8/10 | SYR4 |
| Barium | 54.4 µg/L 2.7% of the EPA limit 2000 µg/L Main supplier: MCALESTER PWA · 18,206 people · 2012
Highest in the city: 63.18 µg/L — US ARMY AMMUNITION PLANT · 1,872 people · 2019 | 4/10 | SYR4 |
| Trichloroacetic Acid | 41.82 µg/L No EPA limit set Main supplier: MCALESTER PWA · 18,206 people · 2019
Highest in the city: 56.7 µg/L — PITTSBURG CO. RWD #14 · 1,680 people · 2019 | 10/10 | SYR4 |
| Dichloroacetic Acid | 35.73 µg/L No EPA limit set Main supplier: MCALESTER PWA · 18,206 people · 2019
Highest in the city: 52.32 µg/L — PITTSBURG CO. RWD #14 · 1,680 people · 2019 | 10/10 | SYR4 |
| Bromodichloromethane | 18.15 µg/L No EPA limit set Main supplier: MCALESTER PWA · 18,206 people · 2019
Highest in the city: 27.2 µg/L — PITTSBURG CO. WATER AUTHORITY · 5 people · 2019 | 10/10 | SYR4 |
| Bromate | 13.2 µg/L 132% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: MCALESTER PWA · 18,206 people · 2019 | 1/10 | SYR4 |
| Monochloroacetic Acid | 8.025 µg/L No EPA limit set Main supplier: MCALESTER PWA · 18,206 people · 2019
Highest in the city: 8.3545 µg/L — PITTSBURG CO. RWD #16 · 1,268 people · 2019 | 10/10 | SYR4 |
| Dibromochloromethane | 3.8235 µg/L No EPA limit set Main supplier: MCALESTER PWA · 18,206 people · 2019
Highest in the city: 7.08 µg/L — PITTSBURG CO. WATER AUTHORITY · 5 people · 2019 | 10/10 | SYR4 |
| Dibromoacetic Acid | 1.389 µg/L No EPA limit set Main supplier: MCALESTER PWA · 18,206 people · 2019
Highest in the city: 6.875 µg/L — PITTSBURG CO. RWD #14 · 1,680 people · 2019 | 9/10 | SYR4 |
| Bromoform | 4.493 µg/L No EPA limit set Highest in the city: PITTSBURG CO. RWD #7 (ARPELAR) · 2,040 people · 2019 | 5/10 | SYR4 |
| Monobromoacetic Acid | 4.477 µg/L No EPA limit set Highest in the city: PITTSBURG CO. RWD #14 · 1,680 people · 2019 | 5/10 | SYR4 |
| Gross Beta Particle Activity | 2.8715 pCi/L No EPA limit set Main supplier: MCALESTER PWA · 18,206 people · 2017
Highest in the city: 4.3 pCi/L — PITTSBURG CO. RWD #14 · 1,680 people · 2013 | 2/10 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 2.42 µg/L 40% of the EPA limit 6 µg/L Main supplier: MCALESTER PWA · 18,206 people · 2017 | 1/10 | SYR4 |
| Combined Radium (-226 And -228) | 2.29665 pCi/L 46% of the EPA limit 5 pCi/L Main supplier: MCALESTER PWA · 18,206 people · 2017 | 1/10 | SYR4 |
| Dalapon | 1.29 µg/L 0.6% of the EPA limit 200 µg/L Main supplier: MCALESTER PWA · 18,206 people · 2019 | 1/10 | SYR4 |
| Gross Alpha, Excl. Radon And U | 0.9900 pCi/L 6.6% of the EPA limit 15 pCi/L Main supplier: MCALESTER PWA · 18,206 people · 2017 | 1/10 | SYR4 |
| Picloram | 0.0800 µg/L 0% of the EPA limit 500 µg/L Main supplier: MCALESTER PWA · 18,206 people · 2019 | 1/10 | SYR4 |
| Pfba | 0.0064 µg/L No EPA limit set Highest in the city: PITTSBURG CO. RWD #11 (KIOWA) · 790 people · 2024 | 2/10 | UCMR-5 |
| Lead | 0.0036 mg/L 24% of the EPA limit 0.0150 mg/L Main supplier: MCALESTER PWA · 18,206 people · 2025 | 10/10 | 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 Mcalester
| Supplier | Population served |
|---|---|
| MCALESTER PWA | 18,206 |
| PITTSBURG CO. RWD #7 (ARPELAR) | 2,040 |
| US ARMY AMMUNITION PLANT | 1,872 |
| PITTSBURG CO. RWD #5 | 1,750 |
| PITTSBURG CO. RWD #14 | 1,680 |
| PITTSBURG CO. RWD #16 | 1,268 |
| PITTSBURG CO. RWD #9 (MCALESTER) | 872 |
| PITTSBURG CO. RWD #11 (KIOWA) | 790 |
| PITTSBURG CO. RWD #6 (ALDERSON) | 300 |
| PITTSBURG CO. WATER AUTHORITY | 5 |
Frequently asked questions about Mcalester tap water
Is Mcalester tap water safe to drink?
EPA testing detected 25 contaminants in the water serving Mcalester. 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 Mcalester?
10 public water suppliers report drinking-water monitoring for Mcalester, Oklahoma to the EPA. Each is listed above with its population served.
What contaminants are in Mcalester's water?
The contaminants EPA monitoring detected in Mcalester include Fluoride, Copper, Nitrate-Nitrite, 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.