What was found in Evanston's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Fluoride | 1075 µg/L 27% of the EPA limit 4000 µg/L Main supplier: EVANSTON · 74,486 people · 2019 | 1/1 | SYR4 |
| Nitrate | 600 µg/L 6% of the EPA limit 10000 µg/L Main supplier: EVANSTON · 74,486 people · 2019 | 1/1 | SYR4 |
| Nitrate-Nitrite | 395 µg/L 4% of the EPA limit 10000 µg/L Main supplier: EVANSTON · 74,486 people · 2018 | 1/1 | SYR4 |
| Copper | 343 µg/L 26% of the EPA limit 1300 µg/L Main supplier: EVANSTON · 74,486 people · 2017 | 1/1 | SYR4 |
| TTHM | 37.4 µg/L 47% of the EPA limit 80 µg/L Main supplier: EVANSTON · 74,486 people · 2019 | 1/1 | SYR4 |
| Barium | 21 µg/L 1.1% of the EPA limit 2000 µg/L Main supplier: EVANSTON · 74,486 people · 2019 | 1/1 | SYR4 |
| Chloroform | 20 µg/L No EPA limit set Main supplier: EVANSTON · 74,486 people · 2019 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 12 µg/L 20% of the EPA limit 60 µg/L Main supplier: EVANSTON · 74,486 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 11.7 µg/L No EPA limit set Main supplier: EVANSTON · 74,486 people · 2019 | 1/1 | SYR4 |
| Trichloroacetic Acid | 8.28 µg/L No EPA limit set Main supplier: EVANSTON · 74,486 people · 2019 | 1/1 | SYR4 |
| Lead | 7.765 µg/L 52% of the EPA limit 15 µg/L Main supplier: EVANSTON · 74,486 people · 2017 | 1/1 | SYR4 |
| Dibromochloromethane | 5.87 µg/L No EPA limit set Main supplier: EVANSTON · 74,486 people · 2019 | 1/1 | SYR4 |
| Dichloroacetic Acid | 5.665 µg/L No EPA limit set Main supplier: EVANSTON · 74,486 people · 2019 | 1/1 | SYR4 |
| Monochloroacetic Acid | 4 µg/L No EPA limit set Main supplier: EVANSTON · 74,486 people · 2019 | 1/1 | SYR4 |
| Dibromoacetic Acid | 1.4 µg/L No EPA limit set Main supplier: EVANSTON · 74,486 people · 2019 | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 0.9900 pCi/L 20% of the EPA limit 5 pCi/L Main supplier: EVANSTON · 74,486 people · 2014 | 1/1 | SYR4 |
| Chromium | 0.9000 µg/L 0.9% of the EPA limit 100 µg/L Main supplier: EVANSTON · 74,486 people · 2019 | 1/1 | SYR4 |
| Bromoform | 0.7000 µg/L No EPA limit set Main supplier: EVANSTON · 74,486 people · 2019 | 1/1 | SYR4 |
| Lead | 0.0080 mg/L 53% of the EPA limit 0.0150 mg/L Main supplier: EVANSTON · 74,486 people · 2025 | 1/1 | LCR |
Water suppliers serving Evanston
| Supplier | Population served |
|---|---|
| EVANSTON | 74,486 |
Frequently asked questions about Evanston tap water
Is Evanston tap water safe to drink?
EPA testing detected 19 contaminants in the water serving Evanston. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Evanston?
1 public water supplier report drinking-water monitoring for Evanston, Illinois to the EPA. Each is listed above with its population served.
What contaminants are in Evanston's water?
The contaminants EPA monitoring detected in Evanston include Fluoride, Nitrate, Nitrate-Nitrite, Copper, TTHM. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.