What was found in ZIP 63303
The highest level seen across the suppliers serving this ZIP, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Nitrate-Nitrite | 7900 µg/L 79% of the EPA limit 10000 µg/L | 2/2 | SYR4 |
| Copper | 846 µg/L 65% of the EPA limit 1300 µg/L | 2/2 | SYR4 |
| Fluoride | 520 µg/L 13% of the EPA limit 4000 µg/L | 2/2 | SYR4 |
| Barium | 77.8 µg/L 3.9% of the EPA limit 2000 µg/L | 2/2 | SYR4 |
| Lithium | 45.1 µg/L No EPA limit set | 1/2 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 41.8 µg/L 70% of the EPA limit 60 µg/L | 1/2 | SYR4 |
| Dichloroacetic Acid | 37.7 µg/L No EPA limit set | 2/2 | SYR4 |
| TTHM | 35.6 µg/L 45% of the EPA limit 80 µg/L | 2/2 | SYR4 |
| Chloroform | 33.8 µg/L No EPA limit set | 2/2 | SYR4 |
| Monochloroacetic Acid | 11.6 µg/L No EPA limit set | 1/2 | SYR4 |
| Monobromoacetic Acid | 7.78 µg/L No EPA limit set | 2/2 | SYR4 |
| Lead | 7.24 µg/L 48% of the EPA limit 15 µg/L | 2/2 | SYR4 |
| Trichloroacetic Acid | 4.64 µg/L No EPA limit set | 2/2 | SYR4 |
| Dibromochloromethane | 3.69 µg/L No EPA limit set | 2/2 | SYR4 |
| Bromodichloromethane | 3.5 µg/L No EPA limit set | 2/2 | SYR4 |
| Chromium | 3.01 µg/L 3% of the EPA limit 100 µg/L | 2/2 | SYR4 |
| Dibromoacetic Acid | 1.37 µg/L No EPA limit set | 2/2 | SYR4 |
| Bromoform | 0.7800 µg/L No EPA limit set | 2/2 | SYR4 |
| Lead | 0.0022 mg/L 15% of the EPA limit 0.0150 mg/L | 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 single worst sample on
record — over 100% is worth reading, but is not by itself a violation.
Formal violations are listed separately.
Water suppliers serving ZIP 63303
| Supplier | State | Population served |
|---|---|---|
| ST CHARLES PWS | MO | 78,961 |
| CLARK COUNTY CONS PWSD 1 | MO | 7,140 |
Frequently asked questions about ZIP 63303 tap water
Is the tap water in ZIP 63303 safe to drink?
EPA testing detected 19 contaminants across the water suppliers serving ZIP 63303. 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 63303?
2 public water suppliers report EPA drinking-water monitoring for ZIP 63303. Each is listed above with its population served.
What contaminants are in ZIP 63303'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.