What was found in ZIP 63376
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 | 596 µg/L 15% of the EPA limit 4000 µg/L Main supplier: ST PETERS PWS · 52,575 people · 2017
Highest in the ZIP: 1276 µg/L — OFALLON PWS · 32,515 people · 2017 | 2/2 | SYR4 |
| Nitrate-Nitrite | 63 µg/L 0.6% of the EPA limit 10000 µg/L Main supplier: ST PETERS PWS · 52,575 people · 2019
Highest in the ZIP: 380.5 µg/L — OFALLON PWS · 32,515 people · 2019 | 2/2 | SYR4 |
| Copper | 25.605 µg/L 2% of the EPA limit 1300 µg/L Main supplier: ST PETERS PWS · 52,575 people · 2018
Highest in the ZIP: 158.8 µg/L — OFALLON PWS · 32,515 people · 2019 | 2/2 | SYR4 |
| Barium | 29.52 µg/L 1.5% of the EPA limit 2000 µg/L Main supplier: ST PETERS PWS · 52,575 people · 2017
Highest in the ZIP: 108.2 µg/L — OFALLON PWS · 32,515 people · 2017 | 2/2 | SYR4 |
| Lithium | 53.1 µg/L No EPA limit set Main supplier: ST PETERS PWS · 52,575 people · 2024
Highest in the ZIP: 71.3 µg/L — OFALLON PWS · 32,515 people · 2025 | 2/2 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 30.52 µg/L 51% of the EPA limit 60 µg/L Main supplier: ST PETERS PWS · 52,575 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 25.96 µg/L No EPA limit set Main supplier: ST PETERS PWS · 52,575 people · 2019 | 2/2 | SYR4 |
| TTHM | 24.84 µg/L 31% of the EPA limit 80 µg/L Main supplier: ST PETERS PWS · 52,575 people · 2019 | 2/2 | SYR4 |
| Chloroform | 21.8 µg/L No EPA limit set Main supplier: ST PETERS PWS · 52,575 people · 2019 | 2/2 | SYR4 |
| Selenium | 11 µg/L 22% of the EPA limit 50 µg/L Highest in the ZIP: OFALLON PWS · 32,515 people · 2017 | 1/2 | SYR4 |
| Chromium | 2.452 µg/L 2.5% of the EPA limit 100 µg/L Main supplier: ST PETERS PWS · 52,575 people · 2017
Highest in the ZIP: 7.444 µg/L — OFALLON PWS · 32,515 people · 2017 | 2/2 | SYR4 |
| Monochloroacetic Acid | 7.23 µg/L No EPA limit set Main supplier: ST PETERS PWS · 52,575 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 4.19 µg/L No EPA limit set Main supplier: ST PETERS PWS · 52,575 people · 2019
Highest in the ZIP: 6.7325 µg/L — OFALLON PWS · 32,515 people · 2019 | 2/2 | SYR4 |
| Combined Radium (-226 And -228) | 5.14 pCi/L 103% of the EPA limit, at the 95th percentile of samples — 5 pCi/L Highest in the ZIP: OFALLON PWS · 32,515 people · 2019 | 1/2 | SYR4 |
| Lead | 3.7875 µg/L 25% of the EPA limit 15 µg/L Main supplier: ST PETERS PWS · 52,575 people · 2018 | 2/2 | SYR4 |
| Trichloroacetic Acid | 3.738 µg/L No EPA limit set Main supplier: ST PETERS PWS · 52,575 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 2.495 µg/L No EPA limit set Main supplier: ST PETERS PWS · 52,575 people · 2019
Highest in the ZIP: 3.712 µg/L — OFALLON PWS · 32,515 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 1.754 µg/L No EPA limit set Main supplier: ST PETERS PWS · 52,575 people · 2019
Highest in the ZIP: 2.586 µg/L — OFALLON PWS · 32,515 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 2.425 µg/L No EPA limit set Main supplier: ST PETERS PWS · 52,575 people · 2019 | 2/2 | SYR4 |
| Arsenic | 2.269 µg/L 23% of the EPA limit 10 µg/L Highest in the ZIP: OFALLON PWS · 32,515 people · 2017 | 1/2 | SYR4 |
| Bromoform | 1.929 µg/L No EPA limit set Main supplier: ST PETERS PWS · 52,575 people · 2019 | 2/2 | SYR4 |
| Trichloroethylene | 0.5900 µg/L 12% of the EPA limit 5 µg/L Main supplier: ST PETERS PWS · 52,575 people · 2017 | 1/2 | SYR4 |
| Pfba | 0.0106 µg/L No EPA limit set Main supplier: ST PETERS PWS · 52,575 people · 2024 | 2/2 | UCMR-5 |
| Pfhxa | 0.0059 µg/L No EPA limit set Main supplier: ST PETERS PWS · 52,575 people · 2024 | 1/2 | UCMR-5 |
| Pfpea | 0.0059 µg/L No EPA limit set Main supplier: ST PETERS PWS · 52,575 people · 2024 | 2/2 | UCMR-5 |
| PFOA | 0.0049 µg/L No EPA limit set Main supplier: ST PETERS PWS · 52,575 people · 2024 | 1/2 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: ST PETERS PWS · 52,575 people · 2024
Highest in the ZIP: 0.0015 mg/L — OFALLON PWS · 32,515 people · 2025 | 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 63376
| Supplier | State | Population served |
|---|---|---|
| ST PETERS PWS | MO | 52,575 |
| OFALLON PWS | MO | 32,515 |
Frequently asked questions about ZIP 63376 tap water
Is the tap water in ZIP 63376 safe to drink?
EPA testing detected 27 contaminants across the water suppliers serving ZIP 63376. 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 63376?
2 public water suppliers report EPA drinking-water monitoring for ZIP 63376. Each is listed above with its population served.
What contaminants are in ZIP 63376's water?
EPA monitoring detected Fluoride, Nitrate-Nitrite, Copper, Barium, Lithium, and others across this ZIP's suppliers. The full list with levels and sources is above.