What was found in ZIP 73533
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 | 350 µg/L 3.5% of the EPA limit 10000 µg/L Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 people · 2019
Highest in the ZIP: 1500 µg/L — STEPHENS CO RWD #5 · 6,426 people · 2019 | 4/4 | SYR4 |
| Fluoride | 280 µg/L 7% of the EPA limit 4000 µg/L Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 people · 2013
Highest in the ZIP: 403 µg/L — STEPHENS CO RWD #5 · 6,426 people · 2019 | 3/4 | SYR4 |
| Barium | 237 µg/L 12% of the EPA limit 2000 µg/L Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 people · 2013
Highest in the ZIP: 352.25 µg/L — STEPHENS CO RWD #5 · 6,426 people · 2019 | 4/4 | SYR4 |
| Copper | 132.19999999999993 µg/L 10% of the EPA limit 1300 µg/L Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 people · 2018
Highest in the ZIP: 288.4999999999998 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2018 | 4/4 | SYR4 |
| TTHM | 190.265 µg/L 238% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 people · 2019 | 4/4 | SYR4 |
| Lead | 126.645 µg/L 844% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 people · 2018 | 4/4 | SYR4 |
| Chloroform | 112.19999999999999 µg/L No EPA limit set Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 people · 2019 | 4/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 77.89999999999998 µg/L 130% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 people · 2019 | 4/4 | SYR4 |
| Bromodichloromethane | 55.879999999999995 µg/L No EPA limit set Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 people · 2019
Highest in the ZIP: 64.74499999999996 µg/L — STEPHENS CO RWD #5 · 6,426 people · 2019 | 4/4 | SYR4 |
| Lithium | 14.2 µg/L No EPA limit set Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 people · 2024
Highest in the ZIP: 53 µg/L — STEPHENS CO RWD #5 · 6,426 people · 2024 | 3/4 | UCMR-5 |
| Dibromochloromethane | 49.959999999999994 µg/L No EPA limit set Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 people · 2019
Highest in the ZIP: 50.96 µg/L — JEFFERSON CO CONS RWD #1 · 8,398 people · 2019 | 4/4 | SYR4 |
| Dichloroacetic Acid | 33.85 µg/L No EPA limit set Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 people · 2019
Highest in the ZIP: 36.22999999999999 µg/L — STEPHENS CO RWD #5 · 6,426 people · 2019 | 4/4 | SYR4 |
| Trichloroacetic Acid | 34.6 µg/L No EPA limit set Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 people · 2019
Highest in the ZIP: 36.03 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 4/4 | SYR4 |
| Gross Alpha, Excl. Radon And U | 18.499999999999993 pCi/L 123% of the EPA limit, at the 95th percentile of samples — 15 pCi/L Highest in the ZIP: JEFFERSON CO CONS RWD #1 · 8,398 people · 2019 | 2/4 | SYR4 |
| Bromoform | 14.944999999999995 µg/L No EPA limit set Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 people · 2019
Highest in the ZIP: 16.75 µg/L — JEFFERSON CO CONS RWD #1 · 8,398 people · 2019 | 4/4 | SYR4 |
| Dibromoacetic Acid | 12 µg/L No EPA limit set Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 people · 2019
Highest in the ZIP: 16.739999999999995 µg/L — STEPHENS CO RWD #5 · 6,426 people · 2019 | 4/4 | SYR4 |
| Gross Beta Particle Activity | 12.382 pCi/L No EPA limit set Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 people · 2018 | 3/4 | SYR4 |
| Chromium | 9.9 µg/L 9.9% of the EPA limit 100 µg/L Highest in the ZIP: JEFFERSON CO CONS RWD #1 · 8,398 people · 2018 | 1/4 | SYR4 |
| Monochloroacetic Acid | 4.9 µg/L No EPA limit set Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 people · 2019
Highest in the ZIP: 8.368 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 4/4 | SYR4 |
| Combined Uranium | 8.331 µg/L 28% of the EPA limit 30 µg/L Highest in the ZIP: JEFFERSON CO CONS RWD #1 · 8,398 people · 2019 | 2/4 | SYR4 |
| Combined Radium (-226 And -228) | 1.49 pCi/L 30% of the EPA limit 5 pCi/L Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 people · 2018
Highest in the ZIP: 3.9019999999999984 pCi/L — JEFFERSON CO CONS RWD #1 · 8,398 people · 2019 | 3/4 | SYR4 |
| Monobromoacetic Acid | 2.65 µg/L No EPA limit set Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 people · 2019
Highest in the ZIP: 3.6494999999999993 µg/L — BRYAN CO. RWS & SWMD #2 · 6,270 people · 2019 | 4/4 | SYR4 |
| Arsenic | 3.09 µg/L 31% of the EPA limit 10 µg/L Highest in the ZIP: STEPHENS CO RWD #5 · 6,426 people · 2019 | 1/4 | SYR4 |
| Diquat | 1.6 µg/L 8% of the EPA limit 20 µg/L Highest in the ZIP: STEPHENS CO RWD #5 · 6,426 people · 2019 | 1/4 | SYR4 |
| Dalapon | 1.44 µg/L 0.7% of the EPA limit 200 µg/L Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 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 | 2/4 | SYR4 |
| Picloram | 0.7030 µg/L 0.1% of the EPA limit 500 µg/L Highest in the ZIP: STEPHENS CO RWD #5 · 6,426 people · 2019 | 1/4 | SYR4 |
| Pentachlorophenol | 0.2100 µg/L 21% of the EPA limit 1 µg/L Highest in the ZIP: STEPHENS CO RWD #5 · 6,426 people · 2019 | 1/4 | SYR4 |
| Pfba | 0.0075 µg/L No EPA limit set Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 people · 2024
Highest in the ZIP: 0.0111 µg/L — JEFFERSON CO CONS RWD #1 · 8,398 people · 2024 | 2/4 | UCMR-5 |
| Pfpea | 0.0038 µg/L No EPA limit set Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 people · 2024 | 1/4 | UCMR-5 |
| Pfhpa | 0.0034 µg/L No EPA limit set Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 people · 2024 | 1/4 | UCMR-5 |
| Pfhxa | 0.0033 µg/L No EPA limit set Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 people · 2024 | 1/4 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: DUNCAN PUBLIC UTILITIES AUTHORITY · 23,000 people · 2024
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 73533
| Supplier | State | Population served |
|---|---|---|
| DUNCAN PUBLIC UTILITIES AUTHORITY | OK | 23,000 |
| JEFFERSON CO CONS RWD #1 | OK | 8,398 |
| STEPHENS CO RWD #5 | OK | 6,426 |
| BRYAN CO. RWS & SWMD #2 | OK | 6,270 |
Frequently asked questions about ZIP 73533 tap water
Is the tap water in ZIP 73533 safe to drink?
EPA testing detected 33 contaminants across the water suppliers serving ZIP 73533. 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 73533?
4 public water suppliers report EPA drinking-water monitoring for ZIP 73533. Each is listed above with its population served.
What contaminants are in ZIP 73533's water?
EPA monitoring detected Nitrate-Nitrite, Fluoride, Barium, Copper, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.