What was found in ZIP 74501
The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Copper | 553 µg/L 43% of the EPA limit 1300 µg/L Main supplier: MCALESTER PWA · 18,206 people · 2019
Highest in the ZIP: 1260 µg/L — ADAMSON RWD #8 · 4,221 people · 2019 | 5/5 | SYR4 |
| Nitrate-Nitrite | 274 µg/L 2.7% of the EPA limit 10000 µg/L Main supplier: MCALESTER PWA · 18,206 people · 2019 | 2/5 | 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 ZIP: 167.714 µg/L — PITTSBURG CO. RWD #11 (KIOWA) · 790 people · 2019 | 5/5 | SYR4 |
| Chloroform | 106.35 µg/L No EPA limit set Main supplier: MCALESTER PWA · 18,206 people · 2019
Highest in the ZIP: 151.95 µg/L — PITTSBURG CO. RWD #11 (KIOWA) · 790 people · 2019 | 5/5 | 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 ZIP: 81.2 µg/L — PITTSBURG CO. RWD #16 · 1,268 people · 2019 | 5/5 | 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 | 5/5 | SYR4 |
| Barium | 54.4 µg/L 2.7% of the EPA limit 2000 µg/L Main supplier: MCALESTER PWA · 18,206 people · 2012 | 2/5 | SYR4 |
| Dichloroacetic Acid | 35.73 µg/L No EPA limit set Main supplier: MCALESTER PWA · 18,206 people · 2019
Highest in the ZIP: 44.425 µg/L — ADAMSON RWD #8 · 4,221 people · 2019 | 5/5 | SYR4 |
| Trichloroacetic Acid | 41.82 µg/L No EPA limit set Main supplier: MCALESTER PWA · 18,206 people · 2019
Highest in the ZIP: 44.31 µg/L — PITTSBURG CO. RWD #16 · 1,268 people · 2019 | 5/5 | SYR4 |
| Bromodichloromethane | 18.15 µg/L No EPA limit set Main supplier: MCALESTER PWA · 18,206 people · 2019
Highest in the ZIP: 26.545 µg/L — ADAMSON RWD #8 · 4,221 people · 2019 | 5/5 | 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 | 1/5 | SYR4 |
| Dibromochloromethane | 3.8235 µg/L No EPA limit set Main supplier: MCALESTER PWA · 18,206 people · 2019
Highest in the ZIP: 8.8385 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 5/5 | SYR4 |
| Monochloroacetic Acid | 8.025 µg/L No EPA limit set Main supplier: MCALESTER PWA · 18,206 people · 2019
Highest in the ZIP: 8.368 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 5/5 | SYR4 |
| Bromoform | 4.004 µg/L No EPA limit set Highest in the ZIP: PITTSBURG CO. RWD #11 (KIOWA) · 790 people · 2019 | 3/5 | SYR4 |
| Monobromoacetic Acid | 3.6495 µg/L No EPA limit set Highest in the ZIP: BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/5 | SYR4 |
| Gross Beta Particle Activity | 2.8715 pCi/L No EPA limit set Main supplier: MCALESTER PWA · 18,206 people · 2017 | 2/5 | SYR4 |
| Dibromoacetic Acid | 1.389 µg/L No EPA limit set Main supplier: MCALESTER PWA · 18,206 people · 2019
Highest in the ZIP: 2.733 µg/L — ADAMSON RWD #8 · 4,221 people · 2019 | 5/5 | 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 | 1/5 | 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 | 2/5 | SYR4 |
| Dalapon | 1.29 µg/L 0.6% of the EPA limit 200 µg/L Main supplier: MCALESTER PWA · 18,206 people · 2019 | 1/5 | 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 | 1/5 | SYR4 |
| 2,4-D | 0.9000 µg/L 1.3% of the EPA limit 70 µg/L Highest in the ZIP: BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 1/5 | SYR4 |
| Picloram | 0.0800 µg/L 0% of the EPA limit 500 µg/L Main supplier: MCALESTER PWA · 18,206 people · 2019 | 1/5 | SYR4 |
| Pfba | 0.0064 µg/L No EPA limit set Highest in the ZIP: PITTSBURG CO. RWD #11 (KIOWA) · 790 people · 2024 | 2/5 | UCMR-5 |
| Lead | 0.0036 mg/L 24% of the EPA limit 0.0150 mg/L Main supplier: MCALESTER PWA · 18,206 people · 2025
Highest in the ZIP: 0.0064 mg/L — ADAMSON RWD #8 · 4,221 people · 2023 | 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.
Water suppliers serving ZIP 74501
| Supplier | State | Population served |
|---|---|---|
| MCALESTER PWA | OK | 18,206 |
| BRYAN CO. RWS & SWMD #2 | OK | 6,270 |
| ADAMSON RWD #8 | OK | 4,221 |
| PITTSBURG CO. RWD #16 | OK | 1,268 |
| PITTSBURG CO. RWD #11 (KIOWA) | OK | 790 |
Frequently asked questions about ZIP 74501 tap water
Is the tap water in ZIP 74501 safe to drink?
EPA testing detected 25 contaminants across the water suppliers serving ZIP 74501. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 74501?
5 public water suppliers report EPA drinking-water monitoring for ZIP 74501. Each is listed above with its population served.
What contaminants are in ZIP 74501's water?
EPA monitoring detected Copper, Nitrate-Nitrite, TTHM, Chloroform, Total Haloacetic Acids (HAA5), and others across this ZIP's suppliers. The full list with levels and sources is above.