What was found in ZIP 82931
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 |
|---|---|---|---|
| Barium | 200 µg/L 10% of the EPA limit 2000 µg/L Main supplier: EVANSTON, CITY OF · 11,727 people · 2019 | 1/1 | SYR4 |
| Copper | 174 µg/L 13% of the EPA limit 1300 µg/L Main supplier: EVANSTON, CITY OF · 11,727 people · 2019 | 1/1 | SYR4 |
| Nitrate-Nitrite | 143 µg/L 1.4% of the EPA limit 10000 µg/L Main supplier: EVANSTON, CITY OF · 11,727 people · 2019 | 1/1 | SYR4 |
| TTHM | 78.7 µg/L 98% of the EPA limit 80 µg/L Main supplier: EVANSTON, CITY OF · 11,727 people · 2019 | 1/1 | SYR4 |
| Chloroform | 71.46 µg/L No EPA limit set Main supplier: EVANSTON, CITY OF · 11,727 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 64.58 µg/L 108% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: EVANSTON, CITY OF · 11,727 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 43.5 µg/L No EPA limit set Main supplier: EVANSTON, CITY OF · 11,727 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 25 µg/L No EPA limit set Main supplier: EVANSTON, CITY OF · 11,727 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 23.3 µg/L No EPA limit set Main supplier: EVANSTON, CITY OF · 11,727 people · 2019 | 1/1 | SYR4 |
| Dibromochloromethane | 7.405 µg/L No EPA limit set Main supplier: EVANSTON, CITY OF · 11,727 people · 2019 | 1/1 | SYR4 |
| Lead | 5 µg/L 33% of the EPA limit 15 µg/L Main supplier: EVANSTON, CITY OF · 11,727 people · 2019 | 1/1 | SYR4 |
| Arsenic | 3 µg/L 30% of the EPA limit 10 µg/L Main supplier: EVANSTON, CITY OF · 11,727 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 2.475 µg/L No EPA limit set Main supplier: EVANSTON, CITY OF · 11,727 people · 2019 | 1/1 | SYR4 |
| Gross Alpha, Excl. Radon And U | 2.435 pCi/L 16% of the EPA limit 15 pCi/L Main supplier: EVANSTON, CITY OF · 11,727 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 1.6 µg/L No EPA limit set Main supplier: EVANSTON, CITY OF · 11,727 people · 2019 | 1/1 | SYR4 |
| Monobromoacetic Acid | 0.7260 µg/L No EPA limit set Main supplier: EVANSTON, CITY OF · 11,727 people · 2019 | 1/1 | SYR4 |
| Combined Uranium | 0.7000 µg/L 2.3% of the EPA limit 30 µg/L Main supplier: EVANSTON, CITY OF · 11,727 people · 2019 | 1/1 | SYR4 |
| Hexachlorocyclopentadiene | 0.1285 µg/L 0.3% of the EPA limit 50 µg/L Main supplier: EVANSTON, CITY OF · 11,727 people · 2019 | 1/1 | SYR4 |
| Lead | 0.00073 mg/L 4.9% of the EPA limit 0.0150 mg/L Main supplier: EVANSTON, CITY OF · 11,727 people · 2025 | 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 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 82931
| Supplier | State | Population served |
|---|---|---|
| EVANSTON, CITY OF | WY | 11,727 |
Frequently asked questions about ZIP 82931 tap water
Is the tap water in ZIP 82931 safe to drink?
EPA testing detected 19 contaminants across the water suppliers serving ZIP 82931. 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 82931?
1 public water supplier report EPA drinking-water monitoring for ZIP 82931. Each is listed above with its population served.
What contaminants are in ZIP 82931's water?
EPA monitoring detected Barium, Copper, Nitrate-Nitrite, TTHM, Chloroform, and others across this ZIP's suppliers. The full list with levels and sources is above.