What was found in ZIP 63301
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 | 20 µg/L 0.2% of the EPA limit 10000 µg/L Main supplier: ST CHARLES PWS · 78,961 people · 2019
Highest in the ZIP: 6779 µg/L — CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019 | 2/2 | SYR4 |
| Copper | 21.76 µg/L 1.7% of the EPA limit 1300 µg/L Main supplier: ST CHARLES PWS · 78,961 people · 2018
Highest in the ZIP: 642.4 µg/L — CLARK COUNTY CONS PWSD 1 · 7,140 people · 2017 | 2/2 | SYR4 |
| Fluoride | 519 µg/L 13% of the EPA limit 4000 µg/L Main supplier: ST CHARLES PWS · 78,961 people · 2017 | 2/2 | SYR4 |
| Barium | 77.525 µg/L 3.9% of the EPA limit 2000 µg/L Main supplier: ST CHARLES PWS · 78,961 people · 2017 | 2/2 | SYR4 |
| Lithium | 45.1 µg/L No EPA limit set Main supplier: ST CHARLES PWS · 78,961 people · 2024 | 1/2 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 35.2 µg/L 59% of the EPA limit 60 µg/L Main supplier: ST CHARLES PWS · 78,961 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 27.87 µg/L No EPA limit set Main supplier: ST CHARLES PWS · 78,961 people · 2019 | 2/2 | SYR4 |
| TTHM | 22.79 µg/L 28% of the EPA limit 80 µg/L Main supplier: ST CHARLES PWS · 78,961 people · 2019 | 2/2 | SYR4 |
| Chloroform | 20.36 µg/L No EPA limit set Main supplier: ST CHARLES PWS · 78,961 people · 2019 | 2/2 | SYR4 |
| Monochloroacetic Acid | 11.076 µg/L No EPA limit set Main supplier: ST CHARLES PWS · 78,961 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 7.34 µg/L No EPA limit set Main supplier: ST CHARLES PWS · 78,961 people · 2019 | 2/2 | SYR4 |
| Lead | 4.374 µg/L 29% of the EPA limit 15 µg/L Main supplier: ST CHARLES PWS · 78,961 people · 2018 | 2/2 | SYR4 |
| Trichloroacetic Acid | 4.0795 µg/L No EPA limit set Main supplier: ST CHARLES PWS · 78,961 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 0.6400 µg/L No EPA limit set Main supplier: ST CHARLES PWS · 78,961 people · 2019
Highest in the ZIP: 3.266 µg/L — CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 2.2625 µg/L No EPA limit set Main supplier: ST CHARLES PWS · 78,961 people · 2019
Highest in the ZIP: 3.244 µg/L — CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019 | 2/2 | SYR4 |
| Chromium | 1.9105 µg/L 1.9% of the EPA limit 100 µg/L Main supplier: ST CHARLES PWS · 78,961 people · 2017
Highest in the ZIP: 3.0075 µg/L — CLARK COUNTY CONS PWSD 1 · 7,140 people · 2017 | 2/2 | SYR4 |
| Dibromoacetic Acid | 1.238 µg/L No EPA limit set Main supplier: ST CHARLES PWS · 78,961 people · 2019
Highest in the ZIP: 1.364 µg/L — CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019 | 2/2 | SYR4 |
| Bromoform | 0.5400 µg/L No EPA limit set Main supplier: ST CHARLES PWS · 78,961 people · 2019
Highest in the ZIP: 0.7725 µg/L — CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019 | 2/2 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: ST CHARLES PWS · 78,961 people · 2024
Highest in the ZIP: 0.0022 mg/L — CLARK COUNTY CONS PWSD 1 · 7,140 people · 2023 | 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 63301
| Supplier | State | Population served |
|---|---|---|
| ST CHARLES PWS | MO | 78,961 |
| CLARK COUNTY CONS PWSD 1 | MO | 7,140 |
Frequently asked questions about ZIP 63301 tap water
Is the tap water in ZIP 63301 safe to drink?
EPA testing detected 19 contaminants across the water suppliers serving ZIP 63301. 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 63301?
2 public water suppliers report EPA drinking-water monitoring for ZIP 63301. Each is listed above with its population served.
What contaminants are in ZIP 63301's water?
EPA monitoring detected Nitrate-Nitrite, Copper, Fluoride, Barium, Lithium, and others across this ZIP's suppliers. The full list with levels and sources is above.