What was found in Coal Valley'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 |
|---|---|---|---|
| Nitrate-Nitrite | 2542.6 µg/L 25% of the EPA limit 10000 µg/L Main supplier: COAL VALLEY · 3,873 people · 2019 | 3/4 | SYR4 |
| Nitrite | 2390 µg/L 239% of the EPA limit, at the 95th percentile of samples — 1000 µg/L Main supplier: COAL VALLEY · 3,873 people · 2019 | 3/4 | SYR4 |
| Fluoride | 1141 µg/L 29% of the EPA limit 4000 µg/L Main supplier: COAL VALLEY · 3,873 people · 2018 | 3/4 | SYR4 |
| Copper | 1138 µg/L 88% of the EPA limit 1300 µg/L Main supplier: COAL VALLEY · 3,873 people · 2018 | 4/4 | SYR4 |
| Barium | 357.4 µg/L 18% of the EPA limit 2000 µg/L Main supplier: COAL VALLEY · 3,873 people · 2018
Highest in the city: 564.5 µg/L — WATER WERKS · 43 people · 2017 | 3/4 | SYR4 |
| Nitrate | 420 µg/L 4.2% of the EPA limit 10000 µg/L Main supplier: COAL VALLEY · 3,873 people · 2019 | 3/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 14.75 µg/L 25% of the EPA limit 60 µg/L Main supplier: COAL VALLEY · 3,873 people · 2019
Highest in the city: 51.05 µg/L — ILCV CANDLE MHP, LLC · 148 people · 2019 | 2/4 | SYR4 |
| Lithium | 46 µg/L No EPA limit set Main supplier: COAL VALLEY · 3,873 people · 2023 | 1/4 | UCMR-5 |
| TTHM | 23.43 µg/L 29% of the EPA limit 80 µg/L Main supplier: COAL VALLEY · 3,873 people · 2019
Highest in the city: 42.266 µg/L — ILCV CANDLE MHP, LLC · 148 people · 2019 | 4/4 | SYR4 |
| Chloroform | 15.24 µg/L No EPA limit set Main supplier: COAL VALLEY · 3,873 people · 2019
Highest in the city: 28.168 µg/L — ILCV CANDLE MHP, LLC · 148 people · 2019 | 4/4 | SYR4 |
| Dichloroacetic Acid | 7.58 µg/L No EPA limit set Main supplier: COAL VALLEY · 3,873 people · 2019
Highest in the city: 25.34 µg/L — ILCV CANDLE MHP, LLC · 148 people · 2019 | 2/4 | SYR4 |
| Lead | 6.6375 µg/L 44% of the EPA limit 15 µg/L Main supplier: COAL VALLEY · 3,873 people · 2018
Highest in the city: 18.6 µg/L — ILCV CANDLE MHP, LLC · 148 people · 2017 | 4/4 | SYR4 |
| Trichloroacetic Acid | 8.15 µg/L No EPA limit set Main supplier: COAL VALLEY · 3,873 people · 2019
Highest in the city: 16.651 µg/L — ILCV CANDLE MHP, LLC · 148 people · 2019 | 2/4 | SYR4 |
| Bromodichloromethane | 8.8 µg/L No EPA limit set Main supplier: COAL VALLEY · 3,873 people · 2019
Highest in the city: 11.26 µg/L — ILCV CANDLE MHP, LLC · 148 people · 2019 | 2/4 | SYR4 |
| Monobromoacetic Acid | 9.7 µg/L No EPA limit set Highest in the city: ILCV CANDLE MHP, LLC · 148 people · 2019 | 1/4 | SYR4 |
| Combined Radium (-226 And -228) | 4.04 pCi/L 81% of the EPA limit 5 pCi/L Main supplier: COAL VALLEY · 3,873 people · 2018 | 3/4 | SYR4 |
| Dibromochloromethane | 3.8 µg/L No EPA limit set Main supplier: COAL VALLEY · 3,873 people · 2019 | 2/4 | SYR4 |
| Xylenes, Total | 2.2325 µg/L 0% of the EPA limit 10000 µg/L Main supplier: COAL VALLEY · 3,873 people · 2019 | 1/4 | SYR4 |
| Carbon Tetrachloride | 1.8 µg/L 36% of the EPA limit 5 µg/L Main supplier: COAL VALLEY · 3,873 people · 2019 | 1/4 | SYR4 |
| Toluene | 1.3 µg/L 0.1% of the EPA limit 1000 µg/L Main supplier: COAL VALLEY · 3,873 people · 2019 | 1/4 | SYR4 |
| Lead | 0.0083 mg/L 55% of the EPA limit 0.0150 mg/L Main supplier: COAL VALLEY · 3,873 people · 2025
Highest in the city: 0.0096 mg/L — ILCV CANDLE MHP, LLC · 148 people · 2025 | 4/4 | 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 Coal Valley
| Supplier | Population served |
|---|---|
| COAL VALLEY | 3,873 |
| ILCV CANDLE MHP, LLC | 148 |
| INDIAN BLUFFS SUBDIVISION | 138 |
| WATER WERKS | 43 |
Frequently asked questions about Coal Valley tap water
Is Coal Valley tap water safe to drink?
EPA testing detected 21 contaminants in the water serving Coal Valley. 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 Coal Valley?
4 public water suppliers report drinking-water monitoring for Coal Valley, Illinois to the EPA. Each is listed above with its population served.
What contaminants are in Coal Valley's water?
The contaminants EPA monitoring detected in Coal Valley include Nitrate-Nitrite, Nitrite, Fluoride, Copper, 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.