What was found in ZIP 63640
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 |
|---|---|---|---|
| Fluoride | 2655.5 µg/L 66% of the EPA limit 4000 µg/L Main supplier: FARMINGTON PWS · 18,217 people · 2018 | 1/3 | SYR4 |
| Nitrate-Nitrite | 1770 µg/L 18% of the EPA limit 10000 µg/L Main supplier: FARMINGTON PWS · 18,217 people · 2019 | 2/3 | SYR4 |
| Copper | 209.35 µg/L 16% of the EPA limit 1300 µg/L Main supplier: FARMINGTON PWS · 18,217 people · 2018
Highest in the ZIP: 863.25 µg/L — THOMAS HILL PWSD 1 · 11,250 people · 2018 | 3/3 | SYR4 |
| TTHM | 21.09 µg/L 26% of the EPA limit 80 µg/L Main supplier: FARMINGTON PWS · 18,217 people · 2019
Highest in the ZIP: 70.265 µg/L — THOMAS HILL PWSD 1 · 11,250 people · 2019 | 2/3 | SYR4 |
| Barium | 4.63 µg/L 0.2% of the EPA limit 2000 µg/L Main supplier: FARMINGTON PWS · 18,217 people · 2018
Highest in the ZIP: 69.99 µg/L — FARMINGTON CORRECTIONAL CENTER · 3,500 people · 2018 | 2/3 | SYR4 |
| Chloroform | 5.346 µg/L No EPA limit set Main supplier: FARMINGTON PWS · 18,217 people · 2019
Highest in the ZIP: 59.3 µg/L — THOMAS HILL PWSD 1 · 11,250 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 54.9 µg/L 91% of the EPA limit 60 µg/L Highest in the ZIP: THOMAS HILL PWSD 1 · 11,250 people · 2019 | 1/3 | SYR4 |
| Lead | 14.2 µg/L 95% of the EPA limit 15 µg/L Main supplier: FARMINGTON PWS · 18,217 people · 2018
Highest in the ZIP: 42.5 µg/L — FARMINGTON CORRECTIONAL CENTER · 3,500 people · 2018 | 3/3 | SYR4 |
| Dichloroacetic Acid | 6.809 µg/L No EPA limit set Main supplier: FARMINGTON PWS · 18,217 people · 2019
Highest in the ZIP: 33.435 µg/L — THOMAS HILL PWSD 1 · 11,250 people · 2019 | 2/3 | SYR4 |
| Combined Uranium | 19.966 µg/L 67% of the EPA limit 30 µg/L Main supplier: FARMINGTON PWS · 18,217 people · 2019 | 2/3 | SYR4 |
| Trichloroacetic Acid | 19.76 µg/L No EPA limit set Highest in the ZIP: THOMAS HILL PWSD 1 · 11,250 people · 2019 | 1/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 18.3 pCi/L 122% of the EPA limit, at the 95th percentile of samples — 15 pCi/L Main supplier: FARMINGTON PWS · 18,217 people · 2019 | 2/3 | SYR4 |
| Bromodichloromethane | 4.848 µg/L No EPA limit set Main supplier: FARMINGTON PWS · 18,217 people · 2019
Highest in the ZIP: 12.865 µg/L — THOMAS HILL PWSD 1 · 11,250 people · 2019 | 2/3 | SYR4 |
| Bromoform | 11.35 µg/L No EPA limit set Main supplier: FARMINGTON PWS · 18,217 people · 2019 | 1/3 | SYR4 |
| Monobromoacetic Acid | 8.661 µg/L No EPA limit set Highest in the ZIP: THOMAS HILL PWSD 1 · 11,250 people · 2019 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 7.87 pCi/L 157% of the EPA limit, at the 95th percentile of samples — 5 pCi/L Main supplier: FARMINGTON PWS · 18,217 people · 2019
Highest in the ZIP: 7.94 pCi/L — FARMINGTON CORRECTIONAL CENTER · 3,500 people · 2019 | 2/3 | SYR4 |
| Chromium | 3.78 µg/L 3.8% of the EPA limit 100 µg/L Main supplier: FARMINGTON PWS · 18,217 people · 2018
Highest in the ZIP: 7.08 µg/L — FARMINGTON CORRECTIONAL CENTER · 3,500 people · 2018 | 2/3 | SYR4 |
| Dibromochloromethane | 4.8535 µg/L No EPA limit set Main supplier: FARMINGTON PWS · 18,217 people · 2019 | 2/3 | SYR4 |
| Arsenic | 2.866 µg/L 29% of the EPA limit 10 µg/L Main supplier: FARMINGTON PWS · 18,217 people · 2018 | 1/3 | SYR4 |
| Dibromoacetic Acid | 2.6105 µg/L No EPA limit set Main supplier: FARMINGTON PWS · 18,217 people · 2019 | 2/3 | SYR4 |
| Tetrachloroethylene | 1.4925 µg/L 30% of the EPA limit 5 µg/L Highest in the ZIP: FARMINGTON CORRECTIONAL CENTER · 3,500 people · 2019 | 1/3 | SYR4 |
| Xylenes, Total | 1.2875 µg/L 0% of the EPA limit 10000 µg/L Highest in the ZIP: FARMINGTON CORRECTIONAL CENTER · 3,500 people · 2019 | 1/3 | SYR4 |
| Toluene | 0.6200 µg/L 0.1% of the EPA limit 1000 µg/L Main supplier: FARMINGTON PWS · 18,217 people · 2018 | 1/3 | SYR4 |
| Pfba | 0.0093 µg/L No EPA limit set Highest in the ZIP: THOMAS HILL PWSD 1 · 11,250 people · 2025 | 1/3 | UCMR-5 |
| Lead | 0.0048 mg/L 32% of the EPA limit 0.0150 mg/L Main supplier: FARMINGTON PWS · 18,217 people · 2024 | 3/3 | LCR |
| PFHXS | 0.0048 µg/L No EPA limit set Main supplier: FARMINGTON PWS · 18,217 people · 2025 | 1/3 | UCMR-5 |
| Pfpea | 0.0038 µg/L No EPA limit set Main supplier: FARMINGTON PWS · 18,217 people · 2025 | 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 63640
| Supplier | State | Population served |
|---|---|---|
| FARMINGTON PWS | MO | 18,217 |
| THOMAS HILL PWSD 1 | MO | 11,250 |
| FARMINGTON CORRECTIONAL CENTER | MO | 3,500 |
Frequently asked questions about ZIP 63640 tap water
Is the tap water in ZIP 63640 safe to drink?
EPA testing detected 27 contaminants across the water suppliers serving ZIP 63640. 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 63640?
3 public water suppliers report EPA drinking-water monitoring for ZIP 63640. Each is listed above with its population served.
What contaminants are in ZIP 63640's water?
EPA monitoring detected Fluoride, Nitrate-Nitrite, Copper, TTHM, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.