What was found in ZIP 61071
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 Highest in the ZIP: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019 | 2/3 | SYR4 |
| Nitrate | 1400 µg/L 14% of the EPA limit 10000 µg/L Highest in the ZIP: ROCK FALLS · 8,620 people · 2019 | 1/3 | SYR4 |
| Fluoride | 1181 µg/L 30% of the EPA limit 4000 µg/L Main supplier: IL AMERICAN-STERLING · 14,782 people · 2018 | 3/3 | SYR4 |
| Copper | 1024.4 µg/L 79% of the EPA limit 1300 µg/L Main supplier: IL AMERICAN-STERLING · 14,782 people · 2017 | 3/3 | SYR4 |
| Barium | 100 µg/L 5% of the EPA limit 2000 µg/L Main supplier: IL AMERICAN-STERLING · 14,782 people · 2018
Highest in the ZIP: 145.5 µg/L — ROCK FALLS · 8,620 people · 2018 | 3/3 | SYR4 |
| TTHM | 56.875 µg/L 71% of the EPA limit 80 µg/L Main supplier: IL AMERICAN-STERLING · 14,782 people · 2019
Highest in the ZIP: 75.55 µg/L — ROCK FALLS · 8,620 people · 2019 | 3/3 | SYR4 |
| Chloroform | 10.125 µg/L No EPA limit set Main supplier: IL AMERICAN-STERLING · 14,782 people · 2019
Highest in the ZIP: 47.405 µg/L — ROCK FALLS · 8,620 people · 2019 | 3/3 | SYR4 |
| Lithium | 33.4 µg/L No EPA limit set Main supplier: IL AMERICAN-STERLING · 14,782 people · 2024 | 1/3 | UCMR-5 |
| Bromoform | 32.725 µg/L No EPA limit set Main supplier: IL AMERICAN-STERLING · 14,782 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 7.66 µg/L 13% of the EPA limit 60 µg/L Main supplier: IL AMERICAN-STERLING · 14,782 people · 2019
Highest in the ZIP: 30.855 µg/L — ROCK FALLS · 8,620 people · 2019 | 2/3 | SYR4 |
| Bromodichloromethane | 8.9 µg/L No EPA limit set Main supplier: IL AMERICAN-STERLING · 14,782 people · 2019
Highest in the ZIP: 19.175 µg/L — ROCK FALLS · 8,620 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 3.6 µg/L No EPA limit set Main supplier: IL AMERICAN-STERLING · 14,782 people · 2019
Highest in the ZIP: 18.26 µg/L — ROCK FALLS · 8,620 people · 2019 | 3/3 | SYR4 |
| Dibromochloromethane | 17.875 µg/L No EPA limit set Main supplier: IL AMERICAN-STERLING · 14,782 people · 2019 | 3/3 | SYR4 |
| Arsenic | 10.915 µg/L 109% of the EPA limit, at the 95th percentile of samples — 10 µg/L Highest in the ZIP: ROCK FALLS · 8,620 people · 2018 | 1/3 | SYR4 |
| Lead | 2.15 µg/L 14% of the EPA limit 15 µg/L Main supplier: IL AMERICAN-STERLING · 14,782 people · 2017
Highest in the ZIP: 10.67 µg/L — ROCK FALLS · 8,620 people · 2017 | 3/3 | SYR4 |
| Trichloroacetic Acid | 1.79 µg/L No EPA limit set Main supplier: IL AMERICAN-STERLING · 14,782 people · 2019
Highest in the ZIP: 10.605 µg/L — ROCK FALLS · 8,620 people · 2019 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 9.5435 pCi/L No EPA limit set Main supplier: IL AMERICAN-STERLING · 14,782 people · 2015 | 1/3 | SYR4 |
| Monobromoacetic Acid | 1.875 µg/L No EPA limit set Main supplier: IL AMERICAN-STERLING · 14,782 people · 2019
Highest in the ZIP: 4.7095 µg/L — CLARK COUNTY CONS PWSD 1 · 7,140 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 4.21 µg/L No EPA limit set Main supplier: IL AMERICAN-STERLING · 14,782 people · 2019 | 3/3 | SYR4 |
| Combined Radium (-226 And -228) | 3.776 pCi/L 76% of the EPA limit 5 pCi/L Main supplier: IL AMERICAN-STERLING · 14,782 people · 2019 | 2/3 | SYR4 |
| Chromium | 3.0075 µg/L 3% of the EPA limit 100 µg/L Highest in the ZIP: CLARK COUNTY CONS PWSD 1 · 7,140 people · 2017 | 1/3 | SYR4 |
| Pfba | 0.0110 µg/L No EPA limit set Highest in the ZIP: ROCK FALLS · 8,620 people · 2025 | 1/3 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: IL AMERICAN-STERLING · 14,782 people · 2025
Highest in the ZIP: 0.0044 mg/L — ROCK FALLS · 8,620 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 61071
| Supplier | State | Population served |
|---|---|---|
| IL AMERICAN-STERLING | IL | 14,782 |
| ROCK FALLS | IL | 8,620 |
| CLARK COUNTY CONS PWSD 1 | MO | 7,140 |
Frequently asked questions about ZIP 61071 tap water
Is the tap water in ZIP 61071 safe to drink?
EPA testing detected 23 contaminants across the water suppliers serving ZIP 61071. 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 61071?
3 public water suppliers report EPA drinking-water monitoring for ZIP 61071. Each is listed above with its population served.
What contaminants are in ZIP 61071's water?
EPA monitoring detected Nitrate-Nitrite, Nitrate, Fluoride, Copper, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.