What was found in ZIP 63117
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 | 2225 µg/L 22% of the EPA limit 10000 µg/L Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019
Highest in the ZIP: 6779 µg/L — CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019 | 3/3 | SYR4 |
| Nitrate | 2231.5 µg/L 22% of the EPA limit 10000 µg/L Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019
Highest in the ZIP: 4067.5 µg/L — ST LOUIS CITY PWS · 304,709 people · 2019 | 2/3 | SYR4 |
| Fluoride | 760 µg/L 19% of the EPA limit 4000 µg/L Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019 | 3/3 | SYR4 |
| Copper | 396.8 µg/L 31% of the EPA limit 1300 µg/L Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019
Highest in the ZIP: 642.4 µg/L — CLARK COUNTY CONS PWSD 1 · 7,140 people · 2017 | 3/3 | SYR4 |
| Nitrite | 100 µg/L 10% of the EPA limit 1000 µg/L Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019 | 2/3 | SYR4 |
| Lithium | 86.8 µg/L No EPA limit set Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2024 | 2/3 | UCMR-5 |
| TTHM | 62.9 µg/L 79% of the EPA limit 80 µg/L Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019 | 3/3 | SYR4 |
| Chloroform | 55.56 µg/L No EPA limit set Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019 | 3/3 | SYR4 |
| Barium | 42.22 µg/L 2.1% of the EPA limit 2000 µg/L Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019
Highest in the ZIP: 54.07 µg/L — CLARK COUNTY CONS PWSD 1 · 7,140 people · 2017 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 33.3 µg/L 55% of the EPA limit 60 µg/L Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019
Highest in the ZIP: 33.7 µg/L — ST LOUIS CITY PWS · 304,709 people · 2019 | 2/3 | SYR4 |
| Dichloroacetic Acid | 27.7 µg/L No EPA limit set Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019
Highest in the ZIP: 28.65 µg/L — ST LOUIS CITY PWS · 304,709 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 12.4 µg/L No EPA limit set Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019 | 3/3 | SYR4 |
| Lead | 6.95 µg/L 46% of the EPA limit 15 µg/L Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 3.9 µg/L No EPA limit set Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019
Highest in the ZIP: 6.6834 µg/L — ST LOUIS CITY PWS · 304,709 people · 2019 | 2/3 | SYR4 |
| Dibromochloromethane | 5.005 µg/L No EPA limit set Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019 | 3/3 | SYR4 |
| Monobromoacetic Acid | 4.325 µg/L No EPA limit set Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019
Highest in the ZIP: 4.9795 µg/L — ST LOUIS CITY PWS · 304,709 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 4.6 µg/L No EPA limit set Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019 | 3/3 | SYR4 |
| Chromium | 1.94 µg/L 1.9% of the EPA limit 100 µg/L Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019
Highest in the ZIP: 3.0075 µg/L — CLARK COUNTY CONS PWSD 1 · 7,140 people · 2017 | 3/3 | SYR4 |
| Selenium | 3 µg/L 6% of the EPA limit 50 µg/L Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019 | 2/3 | SYR4 |
| Dibromoacetic Acid | 2.7 µg/L No EPA limit set Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019
Highest in the ZIP: 2.8958 µg/L — ST LOUIS CITY PWS · 304,709 people · 2019 | 3/3 | SYR4 |
| Arsenic | 1.67 µg/L 17% of the EPA limit 10 µg/L Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019 | 2/3 | SYR4 |
| Atrazine | 0.6100 µg/L 20% of the EPA limit 3 µg/L Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019
Highest in the ZIP: 1.315 µg/L — ST LOUIS CITY PWS · 304,709 people · 2019 | 2/3 | SYR4 |
| Dichloromethane | 1.1 µg/L 22% of the EPA limit 5 µg/L Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019 | 1/3 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.085 µg/L 18% of the EPA limit 6 µg/L Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019 | 1/3 | SYR4 |
| Simazine | 1.0555 µg/L 26% of the EPA limit 4 µg/L Highest in the ZIP: ST LOUIS CITY PWS · 304,709 people · 2019 | 1/3 | SYR4 |
| Bromoform | 1.025 µg/L No EPA limit set Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019 | 2/3 | SYR4 |
| Diquat | 0.5850 µg/L 2.9% of the EPA limit 20 µg/L Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019 | 1/3 | SYR4 |
| Antimony, Total | 0.5000 µg/L 8.3% of the EPA limit 6 µg/L Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019 | 2/3 | SYR4 |
| 2,4-D | 0.4200 µg/L 0.6% of the EPA limit 70 µg/L Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019 | 1/3 | SYR4 |
| Picloram | 0.2000 µg/L 0% of the EPA limit 500 µg/L Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019 | 1/3 | SYR4 |
| Hexachlorocyclopentadiene | 0.1000 µg/L 0.2% of the EPA limit 50 µg/L Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019 | 1/3 | SYR4 |
| Benzo(A)Pyrene | 0.0400 µg/L 20% of the EPA limit 0.2000 µg/L Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019 | 1/3 | SYR4 |
| Ethylene Dibromide | 0.0200 µg/L 40% of the EPA limit 0.0500 µg/L Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2019 | 1/3 | SYR4 |
| Pfba | 0.0051 µg/L No EPA limit set Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2024 | 1/3 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: MO AMERICAN ST LOUIS ST CHARLES COUNTIES · 1,111,000 people · 2025
Highest in the ZIP: 0.0022 mg/L — CLARK COUNTY CONS PWSD 1 · 7,140 people · 2023 | 3/3 | 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 63117
| Supplier | State | Population served |
|---|---|---|
| MO AMERICAN ST LOUIS ST CHARLES COUNTIES | MO | 1,111,000 |
| ST LOUIS CITY PWS | MO | 304,709 |
| CLARK COUNTY CONS PWSD 1 | MO | 7,140 |
Frequently asked questions about ZIP 63117 tap water
Is the tap water in ZIP 63117 safe to drink?
EPA testing detected 35 contaminants across the water suppliers serving ZIP 63117. 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 63117?
3 public water suppliers report EPA drinking-water monitoring for ZIP 63117. Each is listed above with its population served.
What contaminants are in ZIP 63117's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Copper, Nitrite, and others across this ZIP's suppliers. The full list with levels and sources is above.