What was found in ZIP 62221
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 | 5152.5 µg/L 52% of the EPA limit 10000 µg/L Main supplier: IL AMERICAN-EAST ST LOUIS · 131,368 people · 2019 | 1/3 | SYR4 |
| Copper | 459.3 µg/L 35% of the EPA limit 1300 µg/L Main supplier: IL AMERICAN-EAST ST LOUIS · 131,368 people · 2019
Highest in the ZIP: 1189 µg/L — WASHINGTON COUNTY WATER COMPANY · 11,374 people · 2017 | 3/3 | SYR4 |
| Fluoride | 1130 µg/L 28% of the EPA limit 4000 µg/L Main supplier: IL AMERICAN-EAST ST LOUIS · 131,368 people · 2019 | 1/3 | SYR4 |
| TTHM | 40.645 µg/L 51% of the EPA limit 80 µg/L Main supplier: IL AMERICAN-EAST ST LOUIS · 131,368 people · 2019
Highest in the ZIP: 123.75 µg/L — TRITOWNSHIP WATER DISTRICT · 3,470 people · 2019 | 3/3 | SYR4 |
| Chloroform | 34.445 µg/L No EPA limit set Main supplier: IL AMERICAN-EAST ST LOUIS · 131,368 people · 2019
Highest in the ZIP: 107.6 µg/L — TRITOWNSHIP WATER DISTRICT · 3,470 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 28.75 µg/L 48% of the EPA limit 60 µg/L Main supplier: IL AMERICAN-EAST ST LOUIS · 131,368 people · 2019
Highest in the ZIP: 78.93 µg/L — TRITOWNSHIP WATER DISTRICT · 3,470 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 19.245 µg/L No EPA limit set Main supplier: IL AMERICAN-EAST ST LOUIS · 131,368 people · 2019
Highest in the ZIP: 49.18 µg/L — TRITOWNSHIP WATER DISTRICT · 3,470 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 9.445 µg/L No EPA limit set Main supplier: IL AMERICAN-EAST ST LOUIS · 131,368 people · 2019
Highest in the ZIP: 35.32 µg/L — TRITOWNSHIP WATER DISTRICT · 3,470 people · 2019 | 3/3 | SYR4 |
| Bromodichloromethane | 6.49 µg/L No EPA limit set Main supplier: IL AMERICAN-EAST ST LOUIS · 131,368 people · 2019
Highest in the ZIP: 17 µg/L — TRITOWNSHIP WATER DISTRICT · 3,470 people · 2019 | 3/3 | SYR4 |
| Lead | 5 µg/L 33% of the EPA limit 15 µg/L Main supplier: IL AMERICAN-EAST ST LOUIS · 131,368 people · 2019
Highest in the ZIP: 14 µg/L — TRITOWNSHIP WATER DISTRICT · 3,470 people · 2019 | 3/3 | SYR4 |
| Lithium | 13.1 µg/L No EPA limit set Main supplier: IL AMERICAN-EAST ST LOUIS · 131,368 people · 2024 | 1/3 | UCMR-5 |
| Dibromochloromethane | 3.02 µg/L No EPA limit set Main supplier: IL AMERICAN-EAST ST LOUIS · 131,368 people · 2019
Highest in the ZIP: 6.1 µg/L — WASHINGTON COUNTY WATER COMPANY · 11,374 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 2.95 µg/L No EPA limit set Main supplier: IL AMERICAN-EAST ST LOUIS · 131,368 people · 2019
Highest in the ZIP: 5.21 µg/L — TRITOWNSHIP WATER DISTRICT · 3,470 people · 2019 | 3/3 | SYR4 |
| Monobromoacetic Acid | 4.3 µg/L No EPA limit set Main supplier: IL AMERICAN-EAST ST LOUIS · 131,368 people · 2019
Highest in the ZIP: 4.73 µg/L — WASHINGTON COUNTY WATER COMPANY · 11,374 people · 2019 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 4.4 pCi/L No EPA limit set Main supplier: IL AMERICAN-EAST ST LOUIS · 131,368 people · 2014 | 1/3 | SYR4 |
| Dibromoacetic Acid | 2.55 µg/L No EPA limit set Main supplier: IL AMERICAN-EAST ST LOUIS · 131,368 people · 2019 | 3/3 | SYR4 |
| Arsenic | 1.8 µg/L 18% of the EPA limit 10 µg/L Main supplier: IL AMERICAN-EAST ST LOUIS · 131,368 people · 2019 | 1/3 | SYR4 |
| Bromoform | 1.6 µg/L No EPA limit set Highest in the ZIP: WASHINGTON COUNTY WATER COMPANY · 11,374 people · 2019 | 1/3 | SYR4 |
| Atrazine | 1.23 µg/L 41% of the EPA limit 3 µg/L Main supplier: IL AMERICAN-EAST ST LOUIS · 131,368 people · 2019 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 0.9000 pCi/L 18% of the EPA limit 5 pCi/L Main supplier: IL AMERICAN-EAST ST LOUIS · 131,368 people · 2014 | 1/3 | SYR4 |
| Xylenes, Total | 0.7000 µg/L 0% of the EPA limit 10000 µg/L Main supplier: IL AMERICAN-EAST ST LOUIS · 131,368 people · 2019 | 1/3 | SYR4 |
| Pfba | 0.0181 µg/L No EPA limit set Main supplier: IL AMERICAN-EAST ST LOUIS · 131,368 people · 2024 | 2/3 | UCMR-5 |
| Pfhxa | 0.0044 µg/L No EPA limit set Main supplier: IL AMERICAN-EAST ST LOUIS · 131,368 people · 2024 | 1/3 | UCMR-5 |
| Pfpea | 0.0042 µg/L No EPA limit set Main supplier: IL AMERICAN-EAST ST LOUIS · 131,368 people · 2024 | 1/3 | UCMR-5 |
| Lead | 0.0030 mg/L 20% of the EPA limit 0.0150 mg/L Main supplier: IL AMERICAN-EAST ST LOUIS · 131,368 people · 2025 | 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 62221
| Supplier | State | Population served |
|---|---|---|
| IL AMERICAN-EAST ST LOUIS | IL | 131,368 |
| WASHINGTON COUNTY WATER COMPANY | IL | 11,374 |
| TRITOWNSHIP WATER DISTRICT | IL | 3,470 |
Frequently asked questions about ZIP 62221 tap water
Is the tap water in ZIP 62221 safe to drink?
EPA testing detected 25 contaminants across the water suppliers serving ZIP 62221. 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 62221?
3 public water suppliers report EPA drinking-water monitoring for ZIP 62221. Each is listed above with its population served.
What contaminants are in ZIP 62221's water?
EPA monitoring detected Nitrate, Copper, Fluoride, TTHM, Chloroform, and others across this ZIP's suppliers. The full list with levels and sources is above.