What was found in ZIP 74631
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 |
|---|---|---|---|
| Nitrate-Nitrite | 840 µg/L 8.4% of the EPA limit 10000 µg/L Main supplier: BLACKWELL MUNICIPAL AUTHORITY · 7,668 people · 2019 | 1/1 | SYR4 |
| TTHM | 158.2 µg/L 198% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: BLACKWELL MUNICIPAL AUTHORITY · 7,668 people · 2019 | 1/1 | SYR4 |
| Copper | 87 µg/L 6.7% of the EPA limit 1300 µg/L Main supplier: BLACKWELL MUNICIPAL AUTHORITY · 7,668 people · 2018 | 1/1 | SYR4 |
| Dibromochloromethane | 58.865 µg/L No EPA limit set Main supplier: BLACKWELL MUNICIPAL AUTHORITY · 7,668 people · 2019 | 1/1 | SYR4 |
| Lead | 50.01 µg/L 333% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: BLACKWELL MUNICIPAL AUTHORITY · 7,668 people · 2018 | 1/1 | SYR4 |
| Bromoform | 49.64 µg/L No EPA limit set Main supplier: BLACKWELL MUNICIPAL AUTHORITY · 7,668 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 40.255 µg/L No EPA limit set Main supplier: BLACKWELL MUNICIPAL AUTHORITY · 7,668 people · 2019 | 1/1 | SYR4 |
| Chloroform | 28.54 µg/L No EPA limit set Main supplier: BLACKWELL MUNICIPAL AUTHORITY · 7,668 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 26.905 µg/L 45% of the EPA limit 60 µg/L Main supplier: BLACKWELL MUNICIPAL AUTHORITY · 7,668 people · 2019 | 1/1 | SYR4 |
| Barium | 24.8 µg/L 1.2% of the EPA limit 2000 µg/L Main supplier: BLACKWELL MUNICIPAL AUTHORITY · 7,668 people · 2013 | 1/1 | SYR4 |
| Lithium | 21 µg/L No EPA limit set Main supplier: BLACKWELL MUNICIPAL AUTHORITY · 7,668 people · 2023 | 1/1 | UCMR-5 |
| Dibromoacetic Acid | 13.2 µg/L No EPA limit set Main supplier: BLACKWELL MUNICIPAL AUTHORITY · 7,668 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 10.075 µg/L No EPA limit set Main supplier: BLACKWELL MUNICIPAL AUTHORITY · 7,668 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 5.342 µg/L No EPA limit set Main supplier: BLACKWELL MUNICIPAL AUTHORITY · 7,668 people · 2019 | 1/1 | SYR4 |
| Gross Beta Particle Activity | 4.4505 pCi/L No EPA limit set Main supplier: BLACKWELL MUNICIPAL AUTHORITY · 7,668 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 3.38 µg/L No EPA limit set Main supplier: BLACKWELL MUNICIPAL AUTHORITY · 7,668 people · 2019 | 1/1 | SYR4 |
| Monobromoacetic Acid | 3.184 µg/L No EPA limit set Main supplier: BLACKWELL MUNICIPAL AUTHORITY · 7,668 people · 2019 | 1/1 | SYR4 |
| Combined Uranium | 1.5985 µg/L 5.3% of the EPA limit 30 µg/L Main supplier: BLACKWELL MUNICIPAL AUTHORITY · 7,668 people · 2019 | 1/1 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1.091 pCi/L 7.3% of the EPA limit 15 pCi/L Main supplier: BLACKWELL MUNICIPAL AUTHORITY · 7,668 people · 2019 | 1/1 | SYR4 |
| Atrazine | 0.5730 µg/L 19% of the EPA limit 3 µg/L Main supplier: BLACKWELL MUNICIPAL AUTHORITY · 7,668 people · 2019 | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 0.3956 pCi/L 7.9% of the EPA limit 5 pCi/L Main supplier: BLACKWELL MUNICIPAL AUTHORITY · 7,668 people · 2019 | 1/1 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: BLACKWELL MUNICIPAL AUTHORITY · 7,668 people · 2024 | 1/1 | 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 74631
| Supplier | State | Population served |
|---|---|---|
| BLACKWELL MUNICIPAL AUTHORITY | OK | 7,668 |
Frequently asked questions about ZIP 74631 tap water
Is the tap water in ZIP 74631 safe to drink?
EPA testing detected 22 contaminants across the water suppliers serving ZIP 74631. 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 74631?
1 public water supplier report EPA drinking-water monitoring for ZIP 74631. Each is listed above with its population served.
What contaminants are in ZIP 74631's water?
EPA monitoring detected Nitrate-Nitrite, TTHM, Copper, Dibromochloromethane, Lead, and others across this ZIP's suppliers. The full list with levels and sources is above.