What was found in ZIP 63390
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 | 6779 µg/L 68% of the EPA limit 10000 µg/L Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019 | 2/2 | SYR4 |
| Fluoride | 130 µg/L 3.3% of the EPA limit 4000 µg/L Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2017
Highest in the ZIP: 1493 µg/L — ST CHARLES CO PWSD #2 WRIGHT CITY · 3,550 people · 2017 | 2/2 | SYR4 |
| Copper | 642.4 µg/L 49% of the EPA limit 1300 µg/L Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2017 | 2/2 | SYR4 |
| Barium | 54.07 µg/L 2.7% of the EPA limit 2000 µg/L Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2017
Highest in the ZIP: 63.39 µg/L — ST CHARLES CO PWSD #2 WRIGHT CITY · 3,550 people · 2017 | 2/2 | SYR4 |
| Lithium | 62.7 µg/L No EPA limit set Highest in the ZIP: ST CHARLES CO PWSD #2 WRIGHT CITY · 3,550 people · 2025 | 1/2 | UCMR-5 |
| TTHM | 9.848 µg/L 12% of the EPA limit 80 µg/L Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019
Highest in the ZIP: 23.6 µg/L — ST CHARLES CO PWSD #2 WRIGHT CITY · 3,550 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 3.244 µg/L No EPA limit set Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019
Highest in the ZIP: 20.64 µg/L — ST CHARLES CO PWSD #2 WRIGHT CITY · 3,550 people · 2019 | 2/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 19.68 pCi/L 131% of the EPA limit, at the 95th percentile of samples — 15 pCi/L Highest in the ZIP: ST CHARLES CO PWSD #2 WRIGHT CITY · 3,550 people · 2014 | 1/2 | SYR4 |
| Chloroform | 2.5 µg/L No EPA limit set Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019
Highest in the ZIP: 14.636 µg/L — ST CHARLES CO PWSD #2 WRIGHT CITY · 3,550 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 3.266 µg/L No EPA limit set Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019
Highest in the ZIP: 13.19 µg/L — ST CHARLES CO PWSD #2 WRIGHT CITY · 3,550 people · 2019 | 2/2 | SYR4 |
| Chromium | 3.0075 µg/L 3% of the EPA limit 100 µg/L Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2017
Highest in the ZIP: 9.3105 µg/L — ST CHARLES CO PWSD #2 WRIGHT CITY · 3,550 people · 2017 | 2/2 | SYR4 |
| Lead | 4.015 µg/L 27% of the EPA limit 15 µg/L Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2017
Highest in the ZIP: 8.9245 µg/L — ST CHARLES CO PWSD #2 WRIGHT CITY · 3,550 people · 2019 | 2/2 | SYR4 |
| Monobromoacetic Acid | 4.7095 µg/L No EPA limit set Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 4.1 pCi/L 82% of the EPA limit 5 pCi/L Highest in the ZIP: ST CHARLES CO PWSD #2 WRIGHT CITY · 3,550 people · 2019 | 1/2 | SYR4 |
| Xylenes, Total | 3.442 µg/L 0% of the EPA limit 10000 µg/L Highest in the ZIP: ST CHARLES CO PWSD #2 WRIGHT CITY · 3,550 people · 2017 | 1/2 | SYR4 |
| Bromoform | 0.7725 µg/L No EPA limit set Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019
Highest in the ZIP: 3.192 µg/L — ST CHARLES CO PWSD #2 WRIGHT CITY · 3,550 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 3.09 µg/L 5.1% of the EPA limit 60 µg/L Highest in the ZIP: ST CHARLES CO PWSD #2 WRIGHT CITY · 3,550 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 2.9175 µg/L No EPA limit set Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019 | 1/2 | SYR4 |
| Trichloroacetic Acid | 2.774 µg/L No EPA limit set Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019 | 2/2 | SYR4 |
| 2,4-D | 2.48 µg/L 3.5% of the EPA limit 70 µg/L Highest in the ZIP: ST CHARLES CO PWSD #2 WRIGHT CITY · 3,550 people · 2018 | 1/2 | SYR4 |
| Arsenic | 2.38 µg/L 24% of the EPA limit 10 µg/L Highest in the ZIP: ST CHARLES CO PWSD #2 WRIGHT CITY · 3,550 people · 2017 | 1/2 | SYR4 |
| Dibromoacetic Acid | 1.364 µg/L No EPA limit set Main supplier: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019
Highest in the ZIP: 2.07 µg/L — ST CHARLES CO PWSD #2 WRIGHT CITY · 3,550 people · 2019 | 2/2 | SYR4 |
| Ethylbenzene | 0.8600 µg/L 0.1% of the EPA limit 700 µg/L Highest in the ZIP: ST CHARLES CO PWSD #2 WRIGHT CITY · 3,550 people · 2017 | 1/2 | SYR4 |
| Lead | 0.0022 mg/L 15% of the EPA limit 0.0150 mg/L Main supplier: 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 63390
| Supplier | State | Population served |
|---|---|---|
| CLARK COUNTY CONS PWSD 1 | MO | 7,140 |
| ST CHARLES CO PWSD #2 WRIGHT CITY | MO | 3,550 |
Frequently asked questions about ZIP 63390 tap water
Is the tap water in ZIP 63390 safe to drink?
EPA testing detected 24 contaminants across the water suppliers serving ZIP 63390. 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 63390?
2 public water suppliers report EPA drinking-water monitoring for ZIP 63390. Each is listed above with its population served.
What contaminants are in ZIP 63390's water?
EPA monitoring detected Nitrate-Nitrite, Fluoride, Copper, Barium, Lithium, and others across this ZIP's suppliers. The full list with levels and sources is above.