What was found in ZIP 73401
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 | 525 µg/L 5.3% of the EPA limit 10000 µg/L Main supplier: ARDMORE · 24,893 people · 2019
Highest in the ZIP: 2812.5 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 3/4 | SYR4 |
| Fluoride | 390 µg/L 9.8% of the EPA limit 4000 µg/L Main supplier: ARDMORE · 24,893 people · 2013
Highest in the ZIP: 933.5 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 3/4 | SYR4 |
| Chlorite | 824 µg/L 82% of the EPA limit 1000 µg/L Highest in the ZIP: SOUTHERN OKLA WATER CORP · 11,250 people · 2016 | 1/4 | SYR4 |
| Copper | 77.545 µg/L 6% of the EPA limit 1300 µg/L Main supplier: ARDMORE · 24,893 people · 2019
Highest in the ZIP: 288.5 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2018 | 4/4 | SYR4 |
| TTHM | 103.19 µg/L 129% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: ARDMORE · 24,893 people · 2019
Highest in the ZIP: 169.25 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 3/4 | SYR4 |
| Barium | 62.8 µg/L 3.1% of the EPA limit 2000 µg/L Main supplier: ARDMORE · 24,893 people · 2013
Highest in the ZIP: 136 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 4/4 | SYR4 |
| Toluene | 116.933 µg/L 12% of the EPA limit 1000 µg/L Highest in the ZIP: LONE GROVE · 4,863 people · 2019 | 2/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 73.96 µg/L 123% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: ARDMORE · 24,893 people · 2019
Highest in the ZIP: 104.4 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 4/4 | SYR4 |
| Chloroform | 86.515 µg/L No EPA limit set Main supplier: ARDMORE · 24,893 people · 2019
Highest in the ZIP: 97.31 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 4/4 | SYR4 |
| Trichloroacetic Acid | 45.41 µg/L No EPA limit set Main supplier: ARDMORE · 24,893 people · 2019
Highest in the ZIP: 56.21 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 3/4 | SYR4 |
| Lithium | 46.4 µg/L No EPA limit set Highest in the ZIP: SOUTHERN OKLA WATER CORP · 11,250 people · 2025 | 2/4 | UCMR-5 |
| Dichloroacetic Acid | 29.55 µg/L No EPA limit set Main supplier: ARDMORE · 24,893 people · 2019
Highest in the ZIP: 45.81 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 3/4 | SYR4 |
| Bromodichloromethane | 22.145 µg/L No EPA limit set Main supplier: ARDMORE · 24,893 people · 2019
Highest in the ZIP: 40.44 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 3/4 | SYR4 |
| Lead | 4.361 µg/L 29% of the EPA limit 15 µg/L Main supplier: ARDMORE · 24,893 people · 2019
Highest in the ZIP: 30.54 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2018 | 4/4 | SYR4 |
| Dibromochloromethane | 16.44 µg/L No EPA limit set Main supplier: ARDMORE · 24,893 people · 2019
Highest in the ZIP: 28.04 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 3/4 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1.6765 pCi/L 11% of the EPA limit 15 pCi/L Main supplier: ARDMORE · 24,893 people · 2019
Highest in the ZIP: 9.64 pCi/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 3/4 | SYR4 |
| Chromium | 8.65 µg/L 8.7% of the EPA limit 100 µg/L Highest in the ZIP: LONE GROVE · 4,863 people · 2019 | 2/4 | SYR4 |
| Monochloroacetic Acid | 3.39 µg/L No EPA limit set Main supplier: ARDMORE · 24,893 people · 2019
Highest in the ZIP: 8.368 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 4/4 | SYR4 |
| Gross Beta Particle Activity | 6.4705 pCi/L No EPA limit set Main supplier: ARDMORE · 24,893 people · 2019
Highest in the ZIP: 7.316 pCi/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 4/4 | SYR4 |
| Bromoform | 1.745 µg/L No EPA limit set Main supplier: ARDMORE · 24,893 people · 2019
Highest in the ZIP: 7.055 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 3/4 | SYR4 |
| Dibromoacetic Acid | 3.8915 µg/L No EPA limit set Main supplier: ARDMORE · 24,893 people · 2019
Highest in the ZIP: 6.296 µg/L — SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 3/4 | SYR4 |
| Combined Uranium | 1.68 µg/L 5.6% of the EPA limit 30 µg/L Main supplier: ARDMORE · 24,893 people · 2019
Highest in the ZIP: 5.5 µg/L — LONE GROVE · 4,863 people · 2019 | 3/4 | SYR4 |
| Arsenic | 4.622 µg/L 46% of the EPA limit 10 µg/L Highest in the ZIP: SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 2/4 | SYR4 |
| Combined Radium (-226 And -228) | 3.826 pCi/L 77% of the EPA limit 5 pCi/L Highest in the ZIP: LONE GROVE · 4,863 people · 2019 | 3/4 | SYR4 |
| Monobromoacetic Acid | 1.404 µg/L No EPA limit set Main supplier: ARDMORE · 24,893 people · 2019
Highest in the ZIP: 3.6495 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 3/4 | SYR4 |
| Antimony, Total | 2.35 µg/L 39% of the EPA limit 6 µg/L Highest in the ZIP: LONE GROVE · 4,863 people · 2019 | 1/4 | SYR4 |
| Selenium | 1.05 µg/L 2.1% of the EPA limit 50 µg/L Highest in the ZIP: LONE GROVE · 4,863 people · 2019 | 2/4 | SYR4 |
| 2,4-D | 0.1600 µg/L 0.2% of the EPA limit 70 µg/L Main supplier: ARDMORE · 24,893 people · 2019
Highest in the ZIP: 0.9000 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 2/4 | SYR4 |
| Dichloromethane | 0.6000 µg/L 12% of the EPA limit 5 µg/L Main supplier: ARDMORE · 24,893 people · 2018 | 1/4 | SYR4 |
| Mercury | 0.2140 µg/L 11% of the EPA limit 2 µg/L Highest in the ZIP: SOUTHERN OKLA WATER CORP · 11,250 people · 2019 | 1/4 | SYR4 |
| 6:2 Fts | 0.0112 µg/L No EPA limit set Highest in the ZIP: SOUTHERN OKLA WATER CORP · 11,250 people · 2025 | 1/4 | UCMR-5 |
| Pfba | 0.0064 µg/L No EPA limit set Highest in the ZIP: SOUTHERN OKLA WATER CORP · 11,250 people · 2025 | 1/4 | UCMR-5 |
| Pfpea | 0.0052 µg/L No EPA limit set Highest in the ZIP: SOUTHERN OKLA WATER CORP · 11,250 people · 2025 | 1/4 | UCMR-5 |
| Pfhxa | 0.0034 µg/L No EPA limit set Highest in the ZIP: SOUTHERN OKLA WATER CORP · 11,250 people · 2025 | 1/4 | UCMR-5 |
| Lead | 0.00067 mg/L 4.5% of the EPA limit 0.0150 mg/L Main supplier: ARDMORE · 24,893 people · 2026
Highest in the ZIP: 0.0029 mg/L — SOUTHERN OKLA WATER CORP · 11,250 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 73401
| Supplier | State | Population served |
|---|---|---|
| ARDMORE | OK | 24,893 |
| SOUTHERN OKLA WATER CORP | OK | 11,250 |
| BRYAN CO. RWS & SWMD #2 | OK | 6,270 |
| LONE GROVE | OK | 4,863 |
Frequently asked questions about ZIP 73401 tap water
Is the tap water in ZIP 73401 safe to drink?
EPA testing detected 35 contaminants across the water suppliers serving ZIP 73401. 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 73401?
4 public water suppliers report EPA drinking-water monitoring for ZIP 73401. Each is listed above with its population served.
What contaminants are in ZIP 73401's water?
EPA monitoring detected Nitrate-Nitrite, Fluoride, Chlorite, Copper, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.