What was found in ZIP 73078
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 | 439.75 µg/L 4.4% of the EPA limit 10000 µg/L Main supplier: OKLAHOMA CITY · 644,000 people · 2019
Highest in the ZIP: 1310 µg/L — PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2019 | 2/4 | SYR4 |
| Nitrate-Nitrite | 442 µg/L 4.4% of the EPA limit 10000 µg/L Main supplier: OKLAHOMA CITY · 644,000 people · 2019
Highest in the ZIP: 1082 µg/L — PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2019 | 4/4 | SYR4 |
| Fluoride | 845 µg/L 21% of the EPA limit 4000 µg/L Main supplier: OKLAHOMA CITY · 644,000 people · 2013 | 3/4 | SYR4 |
| Copper | 260.926 µg/L 20% of the EPA limit 1300 µg/L Main supplier: OKLAHOMA CITY · 644,000 people · 2019
Highest in the ZIP: 288.5 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2018 | 4/4 | SYR4 |
| Barium | 56.23 µg/L 2.8% of the EPA limit 2000 µg/L Main supplier: OKLAHOMA CITY · 644,000 people · 2013
Highest in the ZIP: 265 µg/L — DEER CREEK RURAL WATER CORP · 5,500 people · 2019 | 4/4 | SYR4 |
| TTHM | 76.688 µg/L 96% of the EPA limit 80 µg/L Main supplier: OKLAHOMA CITY · 644,000 people · 2019
Highest in the ZIP: 122.275 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 4/4 | SYR4 |
| Combined Uranium | 95.71 µg/L 319% of the EPA limit, at the 95th percentile of samples — 30 µg/L Highest in the ZIP: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2018 | 2/4 | SYR4 |
| Chloroform | 57.322 µg/L No EPA limit set Main supplier: OKLAHOMA CITY · 644,000 people · 2019
Highest in the ZIP: 94.645 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 4/4 | SYR4 |
| Lithium | 67.8 µg/L No EPA limit set Main supplier: OKLAHOMA CITY · 644,000 people · 2024 | 3/4 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 46.716 µg/L 78% of the EPA limit 60 µg/L Main supplier: OKLAHOMA CITY · 644,000 people · 2019
Highest in the ZIP: 62.71 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/4 | SYR4 |
| Nitrite | 58.15 µg/L 5.8% of the EPA limit 1000 µg/L Main supplier: OKLAHOMA CITY · 644,000 people · 2019 | 1/4 | SYR4 |
| Gross Alpha, Excl. Radon And U | 46.0825 pCi/L 307% of the EPA limit, at the 95th percentile of samples — 15 pCi/L Highest in the ZIP: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2018 | 2/4 | SYR4 |
| Trichloroacetic Acid | 20.705 µg/L No EPA limit set Main supplier: OKLAHOMA CITY · 644,000 people · 2019
Highest in the ZIP: 36.03 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 2/4 | SYR4 |
| Bromate | 34.14 µg/L 341% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: OKLAHOMA CITY · 644,000 people · 2019 | 1/4 | SYR4 |
| Chromium | 32.05 µg/L 32% of the EPA limit 100 µg/L Highest in the ZIP: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2017 | 2/4 | SYR4 |
| Dichloroacetic Acid | 26.352 µg/L No EPA limit set Main supplier: OKLAHOMA CITY · 644,000 people · 2019
Highest in the ZIP: 30.355 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 4/4 | SYR4 |
| Gross Beta Particle Activity | 8.4806 pCi/L No EPA limit set Main supplier: OKLAHOMA CITY · 644,000 people · 2018
Highest in the ZIP: 27.4 pCi/L — PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2018 | 4/4 | SYR4 |
| Bromodichloromethane | 17.3725 µg/L No EPA limit set Main supplier: OKLAHOMA CITY · 644,000 people · 2019
Highest in the ZIP: 24.055 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 4/4 | SYR4 |
| Selenium | 20.48 µg/L 41% of the EPA limit 50 µg/L Highest in the ZIP: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2017 | 2/4 | SYR4 |
| Lead | 13.313 µg/L 89% of the EPA limit 15 µg/L Main supplier: OKLAHOMA CITY · 644,000 people · 2019
Highest in the ZIP: 18.392 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2018 | 3/4 | SYR4 |
| Arsenic | 12.75 µg/L 127% of the EPA limit, at the 95th percentile of samples — 10 µg/L Highest in the ZIP: DEER CREEK RURAL WATER CORP · 5,500 people · 2019 | 2/4 | SYR4 |
| Dibromochloromethane | 8.63 µg/L No EPA limit set Main supplier: OKLAHOMA CITY · 644,000 people · 2019
Highest in the ZIP: 8.8385 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 4/4 | SYR4 |
| Monochloroacetic Acid | 4.499 µg/L No EPA limit set Main supplier: OKLAHOMA CITY · 644,000 people · 2019
Highest in the ZIP: 8.368 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 2/4 | SYR4 |
| Bromoform | 7.825 µg/L No EPA limit set Main supplier: OKLAHOMA CITY · 644,000 people · 2019 | 4/4 | SYR4 |
| Monobromoacetic Acid | 6.284 µg/L No EPA limit set Main supplier: OKLAHOMA CITY · 644,000 people · 2019 | 3/4 | SYR4 |
| Dibromoacetic Acid | 4.2255 µg/L No EPA limit set Main supplier: OKLAHOMA CITY · 644,000 people · 2019
Highest in the ZIP: 4.73 µg/L — PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2019 | 4/4 | SYR4 |
| Combined Radium (-226 And -228) | 4.142 pCi/L 83% of the EPA limit 5 pCi/L Highest in the ZIP: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2018 | 3/4 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 2.59 µg/L 43% of the EPA limit 6 µg/L Main supplier: OKLAHOMA CITY · 644,000 people · 2019 | 1/4 | 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 | 1/4 | SYR4 |
| Pfba | 0.0059 µg/L No EPA limit set Highest in the ZIP: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2023 | 1/4 | UCMR-5 |
| Pfpea | 0.0047 µg/L No EPA limit set Main supplier: OKLAHOMA CITY · 644,000 people · 2024 | 2/4 | UCMR-5 |
| Pfhxa | 0.0033 µg/L No EPA limit set Highest in the ZIP: PIEDMONT MUNICIPAL AUTHORITY · 7,542 people · 2023 | 1/4 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: OKLAHOMA CITY · 644,000 people · 2025
Highest in the ZIP: 0.00056 mg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2024 | 4/4 | 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 73078
| Supplier | State | Population served |
|---|---|---|
| OKLAHOMA CITY | OK | 644,000 |
| PIEDMONT MUNICIPAL AUTHORITY | OK | 7,542 |
| BRYAN CO. RWS & SWMD #2 | OK | 6,270 |
| DEER CREEK RURAL WATER CORP | OK | 5,500 |
Frequently asked questions about ZIP 73078 tap water
Is the tap water in ZIP 73078 safe to drink?
EPA testing detected 33 contaminants across the water suppliers serving ZIP 73078. 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 73078?
4 public water suppliers report EPA drinking-water monitoring for ZIP 73078. Each is listed above with its population served.
What contaminants are in ZIP 73078's water?
EPA monitoring detected Nitrate, Nitrate-Nitrite, Fluoride, Copper, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.