What was found in Eldorado'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 | 1057.6 µg/L 26% of the EPA limit 4000 µg/L Highest in the city: SALINE VALLEY CONSERVANCY DISTRICT · 3,921 people · 2018 | 1/2 | SYR4 |
| Copper | 160.49999999999997 µg/L 12% of the EPA limit 1300 µg/L Main supplier: ELDORADO · 4,715 people · 2017
Highest in the city: 285 µg/L — SALINE VALLEY CONSERVANCY DISTRICT · 3,921 people · 2019 | 2/2 | SYR4 |
| Nitrate | 120 µg/L 1.2% of the EPA limit 10000 µg/L Highest in the city: SALINE VALLEY CONSERVANCY DISTRICT · 3,921 people · 2019 | 1/2 | SYR4 |
| TTHM | 23.525499999999997 µg/L 29% of the EPA limit 80 µg/L Main supplier: ELDORADO · 4,715 people · 2019
Highest in the city: 66.35 µg/L — SALINE VALLEY CONSERVANCY DISTRICT · 3,921 people · 2019 | 2/2 | SYR4 |
| Lithium | 54 µg/L No EPA limit set Highest in the city: SALINE VALLEY CONSERVANCY DISTRICT · 3,921 people · 2023 | 1/2 | UCMR-5 |
| Chloroform | 12.150499999999997 µg/L No EPA limit set Main supplier: ELDORADO · 4,715 people · 2019
Highest in the city: 31.299999999999997 µg/L — SALINE VALLEY CONSERVANCY DISTRICT · 3,921 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 13.799999999999999 µg/L 23% of the EPA limit 60 µg/L Main supplier: ELDORADO · 4,715 people · 2019
Highest in the city: 23.3 µg/L — SALINE VALLEY CONSERVANCY DISTRICT · 3,921 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 7.1777 µg/L No EPA limit set Main supplier: ELDORADO · 4,715 people · 2019
Highest in the city: 21.450000000000003 µg/L — SALINE VALLEY CONSERVANCY DISTRICT · 3,921 people · 2019 | 2/2 | SYR4 |
| Barium | 14.675 µg/L 0.7% of the EPA limit 2000 µg/L Highest in the city: SALINE VALLEY CONSERVANCY DISTRICT · 3,921 people · 2017 | 1/2 | SYR4 |
| Dibromochloromethane | 4.4925500000000005 µg/L No EPA limit set Main supplier: ELDORADO · 4,715 people · 2019
Highest in the city: 14.25 µg/L — SALINE VALLEY CONSERVANCY DISTRICT · 3,921 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 8.18 µg/L No EPA limit set Main supplier: ELDORADO · 4,715 people · 2019
Highest in the city: 12.42 µg/L — SALINE VALLEY CONSERVANCY DISTRICT · 3,921 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 3.9074999999999993 µg/L No EPA limit set Main supplier: ELDORADO · 4,715 people · 2019
Highest in the city: 8.82 µg/L — SALINE VALLEY CONSERVANCY DISTRICT · 3,921 people · 2019 | 2/2 | SYR4 |
| Monobromoacetic Acid | 5.89 µg/L No EPA limit set Highest in the city: SALINE VALLEY CONSERVANCY DISTRICT · 3,921 people · 2019 | 1/2 | SYR4 |
| Lead | 3.544999999999998 µg/L 24% of the EPA limit 15 µg/L Main supplier: ELDORADO · 4,715 people · 2017 | 2/2 | SYR4 |
| Bromoform | 2.594499999999999 µg/L No EPA limit set Highest in the city: SALINE VALLEY CONSERVANCY DISTRICT · 3,921 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 2.01 µg/L No EPA limit set Main supplier: ELDORADO · 4,715 people · 2019
Highest in the city: 2.3489999999999998 µg/L — SALINE VALLEY CONSERVANCY DISTRICT · 3,921 people · 2019 | 2/2 | SYR4 |
| Arsenic | 1.1 µg/L 11% of the EPA limit 10 µg/L Highest in the city: SALINE VALLEY CONSERVANCY DISTRICT · 3,921 people · 2017 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 0.2920 pCi/L 5.8% of the EPA limit 5 pCi/L Highest in the city: SALINE VALLEY CONSERVANCY DISTRICT · 3,921 people · 2015 | 1/2 | SYR4 |
| Lead | 0.0014 mg/L 9.3% of the EPA limit 0.0150 mg/L Main supplier: ELDORADO · 4,715 people · 2025 | 2/2 | 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 Eldorado
| Supplier | Population served |
|---|---|
| ELDORADO | 4,715 |
| SALINE VALLEY CONSERVANCY DISTRICT | 3,921 |
Frequently asked questions about Eldorado tap water
Is Eldorado tap water safe to drink?
EPA testing detected 19 contaminants in the water serving Eldorado. 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 Eldorado?
2 public water suppliers report drinking-water monitoring for Eldorado, Illinois to the EPA. Each is listed above with its population served.
What contaminants are in Eldorado's water?
The contaminants EPA monitoring detected in Eldorado include Fluoride, Copper, Nitrate, TTHM, Lithium. 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.