What was found in El Dorado'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 | 1012.5 µg/L 25% of the EPA limit 4000 µg/L Main supplier: EL DORADO WATERWORKS · 17,932 people · 2019 | 7/11 | SYR4 |
| Copper | 706 µg/L 54% of the EPA limit 1300 µg/L Main supplier: EL DORADO WATERWORKS · 17,932 people · 2019 | 11/11 | SYR4 |
| Nitrate-Nitrite | 100 µg/L 1% of the EPA limit 10000 µg/L Main supplier: EL DORADO WATERWORKS · 17,932 people · 2019
Highest in the city: 430 µg/L — WESSON-NEWELL WATER ASSOC · 658 people · 2019 | 5/11 | SYR4 |
| TTHM | 83.55 µg/L 104% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: EL DORADO WATERWORKS · 17,932 people · 2019
Highest in the city: 116.5 µg/L — OLD UNION PUBLIC WATER AUTHORITY · 1,200 people · 2019 | 11/11 | SYR4 |
| Cyanide | 100.5 µg/L 50% of the EPA limit 200 µg/L Highest in the city: FAIRCREST WATER ASSOCIATION · 1,329 people · 2019 | 2/11 | SYR4 |
| Bromoform | 60.49 µg/L No EPA limit set Main supplier: EL DORADO WATERWORKS · 17,932 people · 2019
Highest in the city: 94.475 µg/L — FAIRCREST WATER ASSOCIATION · 1,329 people · 2019 | 10/11 | SYR4 |
| Dibromochloromethane | 17.645 µg/L No EPA limit set Main supplier: EL DORADO WATERWORKS · 17,932 people · 2019
Highest in the city: 33.285 µg/L — OLD UNION PUBLIC WATER AUTHORITY · 1,200 people · 2019 | 11/11 | SYR4 |
| Total Haloacetic Acids (HAA5) | 12.56 µg/L 21% of the EPA limit 60 µg/L Main supplier: EL DORADO WATERWORKS · 17,932 people · 2019
Highest in the city: 17.575 µg/L — FAIRCREST WATER ASSOCIATION · 1,329 people · 2019 | 11/11 | SYR4 |
| Lead | 9 µg/L 60% of the EPA limit 15 µg/L Main supplier: EL DORADO WATERWORKS · 17,932 people · 2019
Highest in the city: 15.7 µg/L — HARMONY WATER ASSOCIATION · 336 people · 2019 | 11/11 | SYR4 |
| Gross Beta Particle Activity | 14.535 pCi/L No EPA limit set Highest in the city: PARKERS CHAPEL PUBLIC WATER · 2,391 people · 2019 | 4/11 | SYR4 |
| Dibromoacetic Acid | 10.095 µg/L No EPA limit set Main supplier: EL DORADO WATERWORKS · 17,932 people · 2019
Highest in the city: 14.365 µg/L — FAIRCREST WATER ASSOCIATION · 1,329 people · 2019 | 11/11 | SYR4 |
| Lithium | 11.2 µg/L No EPA limit set Main supplier: EL DORADO WATERWORKS · 17,932 people · 2023 | 1/11 | UCMR-5 |
| Bromodichloromethane | 6.1 µg/L No EPA limit set Main supplier: EL DORADO WATERWORKS · 17,932 people · 2019
Highest in the city: 9.425 µg/L — OLD UNION PUBLIC WATER AUTHORITY · 1,200 people · 2019 | 10/11 | SYR4 |
| Monobromoacetic Acid | 1.81 µg/L No EPA limit set Main supplier: EL DORADO WATERWORKS · 17,932 people · 2019
Highest in the city: 7.95 µg/L — PARKERS CHAPEL PUBLIC WATER · 2,391 people · 2019 | 10/11 | SYR4 |
| Chloroform | 2.5 µg/L No EPA limit set Main supplier: EL DORADO WATERWORKS · 17,932 people · 2019
Highest in the city: 4.41 µg/L — LISBON WATER ASSOCIATION · 439 people · 2019 | 11/11 | SYR4 |
| Chromium | 3.8 µg/L 3.8% of the EPA limit 100 µg/L Highest in the city: FAIRCREST WATER ASSOCIATION · 1,329 people · 2017 | 2/11 | SYR4 |
| Dichloroacetic Acid | 2.36 µg/L No EPA limit set Main supplier: EL DORADO WATERWORKS · 17,932 people · 2019 | 11/11 | SYR4 |
| Trichloroacetic Acid | 1.5 µg/L No EPA limit set Main supplier: EL DORADO WATERWORKS · 17,932 people · 2019
Highest in the city: 1.945 µg/L — LISBON WATER ASSOCIATION · 439 people · 2019 | 11/11 | SYR4 |
| Xylenes, Total | 1.39 µg/L 0% of the EPA limit 10000 µg/L Highest in the city: PARKERS CHAPEL PUBLIC WATER · 2,391 people · 2019 | 2/11 | SYR4 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: EL DORADO WATERWORKS · 17,932 people · 2025
Highest in the city: 0.0200 mg/L — LAWSON-URBANA WATER ASSOC · 1,108 people · 2009 | 11/11 | 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 El Dorado
| Supplier | Population served |
|---|---|
| EL DORADO WATERWORKS | 17,932 |
| PARKERS CHAPEL PUBLIC WATER | 2,391 |
| WILDWOOD WATER ASSOCIATION | 1,350 |
| FAIRCREST WATER ASSOCIATION | 1,329 |
| OLD UNION PUBLIC WATER AUTHORITY | 1,200 |
| LAWSON-URBANA WATER ASSOC | 1,108 |
| WESSON-NEWELL WATER ASSOC | 658 |
| LISBON WATER ASSOCIATION | 439 |
| MOUNT HOLLY WATERWORKS | 384 |
| OAK MANOR WATER ASSOCIATION | 338 |
| HARMONY WATER ASSOCIATION | 336 |
Frequently asked questions about El Dorado tap water
Is El Dorado tap water safe to drink?
EPA testing detected 20 contaminants in the water serving El Dorado. 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 El Dorado?
11 public water suppliers report drinking-water monitoring for El Dorado, Arkansas to the EPA. Each is listed above with its population served.
What contaminants are in El Dorado's water?
The contaminants EPA monitoring detected in El Dorado include Fluoride, Copper, Nitrate-Nitrite, TTHM, Cyanide. 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.