What was found in East Alton'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 | 972.15 µg/L 24% of the EPA limit 4000 µg/L Main supplier: EAST ALTON · 5,786 people · 2017 | 1/1 | SYR4 |
| Lead | 126.5 µg/L 843% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: EAST ALTON · 5,786 people · 2017 | 1/1 | SYR4 |
| Copper | 75.9 µg/L 5.8% of the EPA limit 1300 µg/L Main supplier: EAST ALTON · 5,786 people · 2017 | 1/1 | SYR4 |
| Nitrate | 60 µg/L 0.6% of the EPA limit 10000 µg/L Main supplier: EAST ALTON · 5,786 people · 2019 | 1/1 | SYR4 |
| Barium | 43.55 µg/L 2.2% of the EPA limit 2000 µg/L Main supplier: EAST ALTON · 5,786 people · 2017 | 1/1 | SYR4 |
| TTHM | 37.318 µg/L 47% of the EPA limit 80 µg/L Main supplier: EAST ALTON · 5,786 people · 2019 | 1/1 | SYR4 |
| Bromoform | 18.15 µg/L No EPA limit set Main supplier: EAST ALTON · 5,786 people · 2019 | 1/1 | SYR4 |
| Lithium | 18 µg/L No EPA limit set Main supplier: EAST ALTON · 5,786 people · 2025 | 1/1 | UCMR-5 |
| Dibromochloromethane | 10.685 µg/L No EPA limit set Main supplier: EAST ALTON · 5,786 people · 2019 | 1/1 | SYR4 |
| Bromodichloromethane | 7.7636 µg/L No EPA limit set Main supplier: EAST ALTON · 5,786 people · 2019 | 1/1 | SYR4 |
| Chloroform | 6.4603 µg/L No EPA limit set Main supplier: EAST ALTON · 5,786 people · 2019 | 1/1 | SYR4 |
| Chromium | 6.39 µg/L 6.4% of the EPA limit 100 µg/L Main supplier: EAST ALTON · 5,786 people · 2017 | 1/1 | SYR4 |
| Total Haloacetic Acids (HAA5) | 4.98 µg/L 8.3% of the EPA limit 60 µg/L Main supplier: EAST ALTON · 5,786 people · 2019 | 1/1 | SYR4 |
| cis-1,2-Dichloroethylene | 4.46 µg/L 6.4% of the EPA limit 70 µg/L Main supplier: EAST ALTON · 5,786 people · 2019 | 1/1 | SYR4 |
| Selenium | 3.7 µg/L 7.4% of the EPA limit 50 µg/L Main supplier: EAST ALTON · 5,786 people · 2017 | 1/1 | SYR4 |
| Dibromoacetic Acid | 3.594 µg/L No EPA limit set Main supplier: EAST ALTON · 5,786 people · 2019 | 1/1 | SYR4 |
| Carbon Tetrachloride | 2.4 µg/L 48% of the EPA limit 5 µg/L Main supplier: EAST ALTON · 5,786 people · 2019 | 1/1 | SYR4 |
| Arsenic | 1.79 µg/L 18% of the EPA limit 10 µg/L Main supplier: EAST ALTON · 5,786 people · 2017 | 1/1 | SYR4 |
| Dichloroacetic Acid | 1.54 µg/L No EPA limit set Main supplier: EAST ALTON · 5,786 people · 2019 | 1/1 | SYR4 |
| Combined Radium (-226 And -228) | 0.8150 pCi/L 16% of the EPA limit 5 pCi/L Main supplier: EAST ALTON · 5,786 people · 2014 | 1/1 | SYR4 |
| trans-1,2-Dichloroethylene | 0.7075 µg/L 0.7% of the EPA limit 100 µg/L Main supplier: EAST ALTON · 5,786 people · 2019 | 1/1 | SYR4 |
| PFOS | 0.0170 µg/L No EPA limit set Main supplier: EAST ALTON · 5,786 people · 2025 | 1/1 | UCMR-5 |
| Pfba | 0.0160 µg/L No EPA limit set Main supplier: EAST ALTON · 5,786 people · 2025 | 1/1 | UCMR-5 |
| PFOA | 0.0160 µg/L No EPA limit set Main supplier: EAST ALTON · 5,786 people · 2025 | 1/1 | UCMR-5 |
| PFHXS | 0.0088 µg/L No EPA limit set Main supplier: EAST ALTON · 5,786 people · 2025 | 1/1 | UCMR-5 |
| PFBS | 0.0084 µg/L No EPA limit set Main supplier: EAST ALTON · 5,786 people · 2025 | 1/1 | UCMR-5 |
| Pfpea | 0.0083 µg/L No EPA limit set Main supplier: EAST ALTON · 5,786 people · 2025 | 1/1 | UCMR-5 |
| Pfhxa | 0.0056 µg/L No EPA limit set Main supplier: EAST ALTON · 5,786 people · 2025 | 1/1 | UCMR-5 |
| Pfhpa | 0.0038 µg/L No EPA limit set Main supplier: EAST ALTON · 5,786 people · 2025 | 1/1 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: EAST ALTON · 5,786 people · 2023 | 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.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving East Alton
| Supplier | Population served |
|---|---|
| EAST ALTON | 5,786 |
Frequently asked questions about East Alton tap water
Is East Alton tap water safe to drink?
EPA testing detected 30 contaminants in the water serving East Alton. 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 East Alton?
1 public water supplier report drinking-water monitoring for East Alton, Illinois to the EPA. Each is listed above with its population served.
What contaminants are in East Alton's water?
The contaminants EPA monitoring detected in East Alton include Fluoride, Lead, Copper, Nitrate, Barium. 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.