What was found in ZIP 74804
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 | 1320 µg/L 13% of the EPA limit 10000 µg/L Main supplier: SHAWNEE MUNICIPAL AUTHORITY · 29,990 people · 2019 | 3/3 | SYR4 |
| Chlorite | 953.5 µg/L 95% of the EPA limit 1000 µg/L Main supplier: SHAWNEE MUNICIPAL AUTHORITY · 29,990 people · 2019 | 1/3 | SYR4 |
| Fluoride | 499 µg/L 12% of the EPA limit 4000 µg/L Highest in the ZIP: Pottawatomie Co. Rwd #3 (dale Plant) · 5,780 people · 2015 | 1/3 | SYR4 |
| Copper | 326.55 µg/L 25% of the EPA limit 1300 µg/L Main supplier: SHAWNEE MUNICIPAL AUTHORITY · 29,990 people · 2017
Highest in the ZIP: 406.4 µg/L — Pottawatomie Co. Rwd #3 (dale Plant) · 5,780 people · 2018 | 3/3 | SYR4 |
| Nitrate | 150 µg/L 1.5% of the EPA limit 10000 µg/L Highest in the ZIP: Pottawatomie Co. Rwd #3 (dale Plant) · 5,780 people · 2013 | 1/3 | SYR4 |
| Barium | 144 µg/L 7.2% of the EPA limit 2000 µg/L Main supplier: SHAWNEE MUNICIPAL AUTHORITY · 29,990 people · 2012 | 3/3 | SYR4 |
| TTHM | 47.965 µg/L 60% of the EPA limit 80 µg/L Main supplier: SHAWNEE MUNICIPAL AUTHORITY · 29,990 people · 2019
Highest in the ZIP: 122.275 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Chloroform | 21.85 µg/L No EPA limit set Main supplier: SHAWNEE MUNICIPAL AUTHORITY · 29,990 people · 2019
Highest in the ZIP: 94.645 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 37.4 µg/L 62% of the EPA limit 60 µg/L Main supplier: SHAWNEE MUNICIPAL AUTHORITY · 29,990 people · 2019
Highest in the ZIP: 62.71 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 8.71 µg/L No EPA limit set Main supplier: SHAWNEE MUNICIPAL AUTHORITY · 29,990 people · 2019
Highest in the ZIP: 36.03 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 25.705 µg/L No EPA limit set Main supplier: SHAWNEE MUNICIPAL AUTHORITY · 29,990 people · 2019
Highest in the ZIP: 30.355 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 14.2 µg/L No EPA limit set Main supplier: SHAWNEE MUNICIPAL AUTHORITY · 29,990 people · 2019
Highest in the ZIP: 28.97 µg/L — Pottawatomie Co. Rwd #3 (dale Plant) · 5,780 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 17.215 µg/L No EPA limit set Main supplier: SHAWNEE MUNICIPAL AUTHORITY · 29,990 people · 2019
Highest in the ZIP: 24.055 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Lead | 24.02 µg/L 160% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: SHAWNEE MUNICIPAL AUTHORITY · 29,990 people · 2017 | 3/3 | SYR4 |
| Lithium | 20 µg/L No EPA limit set Highest in the ZIP: Pottawatomie Co. Rwd #3 (dale Plant) · 5,780 people · 2023 | 1/3 | UCMR-5 |
| Bromoform | 7.8995 µg/L No EPA limit set Main supplier: SHAWNEE MUNICIPAL AUTHORITY · 29,990 people · 2019
Highest in the ZIP: 15.045 µg/L — Pottawatomie Co. Rwd #3 (dale Plant) · 5,780 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 5.404 µg/L No EPA limit set Main supplier: SHAWNEE MUNICIPAL AUTHORITY · 29,990 people · 2019
Highest in the ZIP: 8.368 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 2/3 | SYR4 |
| Dibromoacetic Acid | 6.67 µg/L No EPA limit set Main supplier: SHAWNEE MUNICIPAL AUTHORITY · 29,990 people · 2019
Highest in the ZIP: 6.896 µg/L — Pottawatomie Co. Rwd #3 (dale Plant) · 5,780 people · 2019 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 5.163 pCi/L No EPA limit set Main supplier: SHAWNEE MUNICIPAL AUTHORITY · 29,990 people · 2014 | 3/3 | SYR4 |
| Combined Uranium | 4.84864 µg/L 16% of the EPA limit 30 µg/L Highest in the ZIP: Pottawatomie Co. Rwd #3 (dale Plant) · 5,780 people · 2018 | 1/3 | SYR4 |
| Monobromoacetic Acid | 1.705 µg/L No EPA limit set Main supplier: SHAWNEE MUNICIPAL AUTHORITY · 29,990 people · 2019
Highest in the ZIP: 3.6495 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1.66 pCi/L 11% of the EPA limit 15 pCi/L Main supplier: SHAWNEE MUNICIPAL AUTHORITY · 29,990 people · 2014 | 2/3 | SYR4 |
| Combined Radium (-226 And -228) | 0.3200 pCi/L 6.4% of the EPA limit 5 pCi/L Main supplier: SHAWNEE MUNICIPAL AUTHORITY · 29,990 people · 2014
Highest in the ZIP: 1.095 pCi/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/3 | 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 | 1/3 | SYR4 |
| Pfba | 0.0079 µg/L No EPA limit set Main supplier: SHAWNEE MUNICIPAL AUTHORITY · 29,990 people · 2024 | 1/3 | UCMR-5 |
| Lead | 0.0028 mg/L 19% of the EPA limit 0.0150 mg/L Main supplier: SHAWNEE MUNICIPAL AUTHORITY · 29,990 people · 2023
Highest in the ZIP: 0.0050 mg/L — Pottawatomie Co. Rwd #3 (dale Plant) · 5,780 people · 2025 | 3/3 | LCR |
| PFOS | 0.0041 µg/L No EPA limit set Highest in the ZIP: Pottawatomie Co. Rwd #3 (dale Plant) · 5,780 people · 2023 | 1/3 | UCMR-5 |
| PFHXS | 0.0033 µg/L No EPA limit set Highest in the ZIP: Pottawatomie Co. Rwd #3 (dale Plant) · 5,780 people · 2023 | 1/3 | UCMR-5 |
| Pfpea | 0.0032 µg/L No EPA limit set Main supplier: SHAWNEE MUNICIPAL AUTHORITY · 29,990 people · 2024 | 1/3 | UCMR-5 |
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 74804
| Supplier | State | Population served |
|---|---|---|
| SHAWNEE MUNICIPAL AUTHORITY | OK | 29,990 |
| BRYAN CO. RWS & SWMD #2 | OK | 6,270 |
| Pottawatomie Co. Rwd #3 (dale Plant) | 5,780 |
Frequently asked questions about ZIP 74804 tap water
Is the tap water in ZIP 74804 safe to drink?
EPA testing detected 29 contaminants across the water suppliers serving ZIP 74804. 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 74804?
3 public water suppliers report EPA drinking-water monitoring for ZIP 74804. Each is listed above with its population served.
What contaminants are in ZIP 74804's water?
EPA monitoring detected Nitrate-Nitrite, Chlorite, Fluoride, Copper, Nitrate, and others across this ZIP's suppliers. The full list with levels and sources is above.