What was found in ZIP 63103
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 | 4160 µg/L 42% of the EPA limit 10000 µg/L | 1/1 | SYR4 |
| Nitrate | 4120 µg/L 41% of the EPA limit 10000 µg/L | 1/1 | SYR4 |
| Fluoride | 650 µg/L 16% of the EPA limit 4000 µg/L | 1/1 | SYR4 |
| Copper | 148.532 µg/L 11% of the EPA limit 1300 µg/L | 1/1 | SYR4 |
| Lithium | 45.3 µg/L No EPA limit set | 1/1 | UCMR-5 |
| Total Haloacetic Acids (HAA5) | 42.73 µg/L 71% of the EPA limit 60 µg/L | 1/1 | SYR4 |
| Nitrite | 39.5 µg/L 4% of the EPA limit 1000 µg/L | 1/1 | SYR4 |
| Dichloroacetic Acid | 35.68 µg/L No EPA limit set | 1/1 | SYR4 |
| TTHM | 30.9 µg/L 39% of the EPA limit 80 µg/L | 1/1 | SYR4 |
| Chloroform | 29 µg/L No EPA limit set | 1/1 | SYR4 |
| Barium | 27.79 µg/L 1.4% of the EPA limit 2000 µg/L | 1/1 | SYR4 |
| Bromodichloromethane | 9.69 µg/L No EPA limit set | 1/1 | SYR4 |
| Monochloroacetic Acid | 7.009 µg/L No EPA limit set | 1/1 | SYR4 |
| Lead | 6.677 µg/L 45% of the EPA limit 15 µg/L | 1/1 | SYR4 |
| Monobromoacetic Acid | 5.63 µg/L No EPA limit set | 1/1 | SYR4 |
| Trichloroacetic Acid | 3.82 µg/L No EPA limit set | 1/1 | SYR4 |
| Dibromoacetic Acid | 2.972 µg/L No EPA limit set | 1/1 | SYR4 |
| Selenium | 2.588 µg/L 5.2% of the EPA limit 50 µg/L | 1/1 | SYR4 |
| Chromium | 1.82 µg/L 1.8% of the EPA limit 100 µg/L | 1/1 | SYR4 |
| Dibromochloromethane | 1.64 µg/L No EPA limit set | 1/1 | SYR4 |
| Atrazine | 1.56 µg/L 52% of the EPA limit 3 µg/L | 1/1 | SYR4 |
| Arsenic | 1.12 µg/L 11% of the EPA limit 10 µg/L | 1/1 | SYR4 |
| Simazine | 1.08 µg/L 27% of the EPA limit 4 µg/L | 1/1 | SYR4 |
| Antimony, Total | 0.3900 µg/L 6.5% of the EPA limit 6 µg/L | 1/1 | SYR4 |
| Lead | 0.0018 mg/L 12% of the EPA limit 0.0150 mg/L | 1/1 | 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 63103
| Supplier | State | Population served |
|---|---|---|
| ST LOUIS CITY PWS | MO | 304,709 |
Frequently asked questions about ZIP 63103 tap water
Is the tap water in ZIP 63103 safe to drink?
EPA testing detected 25 contaminants across the water suppliers serving ZIP 63103. 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 63103?
1 public water supplier report EPA drinking-water monitoring for ZIP 63103. Each is listed above with its population served.
What contaminants are in ZIP 63103's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Copper, Lithium, and others across this ZIP's suppliers. The full list with levels and sources is above.