What was found in ZIP 73018
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 | 870 µg/L 8.7% of the EPA limit 10000 µg/L Main supplier: CHICKASHA MUNICIPAL AUTHORITY · 16,036 people · 2019
Highest in the ZIP: 6500 µg/L — GRADY CO RWD #6 · 3,930 people · 2019 | 2/2 | SYR4 |
| Fluoride | 1000 µg/L 25% of the EPA limit 4000 µg/L Main supplier: CHICKASHA MUNICIPAL AUTHORITY · 16,036 people · 2019 | 2/2 | SYR4 |
| Barium | 119 µg/L 5.9% of the EPA limit 2000 µg/L Main supplier: CHICKASHA MUNICIPAL AUTHORITY · 16,036 people · 2013
Highest in the ZIP: 553.4 µg/L — GRADY CO RWD #6 · 3,930 people · 2018 | 2/2 | SYR4 |
| Copper | 345.3 µg/L 27% of the EPA limit 1300 µg/L Main supplier: CHICKASHA MUNICIPAL AUTHORITY · 16,036 people · 2018 | 2/2 | SYR4 |
| TTHM | 129.575 µg/L 162% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: CHICKASHA MUNICIPAL AUTHORITY · 16,036 people · 2019 | 2/2 | SYR4 |
| Chloroform | 73.6 µg/L No EPA limit set Main supplier: CHICKASHA MUNICIPAL AUTHORITY · 16,036 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 55.059999999999995 µg/L 92% of the EPA limit 60 µg/L Main supplier: CHICKASHA MUNICIPAL AUTHORITY · 16,036 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 41.78 µg/L No EPA limit set Main supplier: CHICKASHA MUNICIPAL AUTHORITY · 16,036 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 28.024999999999995 µg/L No EPA limit set Main supplier: CHICKASHA MUNICIPAL AUTHORITY · 16,036 people · 2019 | 2/2 | SYR4 |
| Lithium | 11.6 µg/L No EPA limit set Main supplier: CHICKASHA MUNICIPAL AUTHORITY · 16,036 people · 2025
Highest in the ZIP: 24.3 µg/L — GRADY CO RWD #6 · 3,930 people · 2023 | 2/2 | UCMR-5 |
| Dibromochloromethane | 23.9 µg/L No EPA limit set Main supplier: CHICKASHA MUNICIPAL AUTHORITY · 16,036 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 20.41999999999999 µg/L No EPA limit set Main supplier: CHICKASHA MUNICIPAL AUTHORITY · 16,036 people · 2019 | 2/2 | SYR4 |
| Lead | 9.600999999999992 µg/L 64% of the EPA limit 15 µg/L Main supplier: CHICKASHA MUNICIPAL AUTHORITY · 16,036 people · 2018 | 1/2 | SYR4 |
| Arsenic | 6.965 µg/L 70% of the EPA limit 10 µg/L Highest in the ZIP: GRADY CO RWD #6 · 3,930 people · 2018 | 1/2 | SYR4 |
| Gross Beta Particle Activity | 6.69415 pCi/L No EPA limit set Main supplier: CHICKASHA MUNICIPAL AUTHORITY · 16,036 people · 2019 | 2/2 | SYR4 |
| Bromoform | 3.1 µg/L No EPA limit set Main supplier: CHICKASHA MUNICIPAL AUTHORITY · 16,036 people · 2019
Highest in the ZIP: 6.395 µg/L — GRADY CO RWD #6 · 3,930 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 5.32 µg/L No EPA limit set Main supplier: CHICKASHA MUNICIPAL AUTHORITY · 16,036 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 4.75 µg/L No EPA limit set Main supplier: CHICKASHA MUNICIPAL AUTHORITY · 16,036 people · 2019 | 1/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 1.1362999999999999 pCi/L 7.6% of the EPA limit 15 pCi/L Main supplier: CHICKASHA MUNICIPAL AUTHORITY · 16,036 people · 2019
Highest in the ZIP: 4.398999999999999 pCi/L — GRADY CO RWD #6 · 3,930 people · 2015 | 2/2 | SYR4 |
| Monobromoacetic Acid | 2.19 µg/L No EPA limit set Main supplier: CHICKASHA MUNICIPAL AUTHORITY · 16,036 people · 2019 | 1/2 | SYR4 |
| Combined Uranium | 1.4849999999999999 µg/L 4.9% of the EPA limit 30 µg/L Highest in the ZIP: GRADY CO RWD #6 · 3,930 people · 2015 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 0.7940 pCi/L 16% of the EPA limit 5 pCi/L Main supplier: CHICKASHA MUNICIPAL AUTHORITY · 16,036 people · 2019 | 1/2 | SYR4 |
| Xylenes, Total | 0.7700 µg/L 0% of the EPA limit 10000 µg/L Highest in the ZIP: GRADY CO RWD #6 · 3,930 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0037 mg/L 25% of the EPA limit 0.0150 mg/L Main supplier: CHICKASHA MUNICIPAL AUTHORITY · 16,036 people · 2024 | 2/2 | 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 73018
| Supplier | State | Population served |
|---|---|---|
| CHICKASHA MUNICIPAL AUTHORITY | OK | 16,036 |
| GRADY CO RWD #6 | OK | 3,930 |
Frequently asked questions about ZIP 73018 tap water
Is the tap water in ZIP 73018 safe to drink?
EPA testing detected 24 contaminants across the water suppliers serving ZIP 73018. 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 73018?
2 public water suppliers report EPA drinking-water monitoring for ZIP 73018. Each is listed above with its population served.
What contaminants are in ZIP 73018'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.