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 | 782 µg/L 20% of the EPA limit 4000 µg/L Main supplier: EL DORADO, CITY OF · 12,810 people · 2019 | 1/4 | SYR4 |
| Copper | 352.99999999999983 µg/L 27% of the EPA limit 1300 µg/L Main supplier: EL DORADO, CITY OF · 12,810 people · 2019
Highest in the city: 525.4999999999993 µg/L — BUTLER CO RWD 6 · 2,655 people · 2018 | 4/4 | SYR4 |
| Nitrate | 400 µg/L 4% of the EPA limit 10000 µg/L Main supplier: EL DORADO, CITY OF · 12,810 people · 2019 | 1/4 | SYR4 |
| Barium | 87.65 µg/L 4.4% of the EPA limit 2000 µg/L Main supplier: EL DORADO, CITY OF · 12,810 people · 2019 | 1/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 32.9 µg/L 55% of the EPA limit 60 µg/L Main supplier: EL DORADO, CITY OF · 12,810 people · 2019
Highest in the city: 63.050000000000054 µg/L — BUTLER CO RWD 1 · 782 people · 2019 | 4/4 | SYR4 |
| TTHM | 26.74 µg/L 33% of the EPA limit 80 µg/L Main supplier: EL DORADO, CITY OF · 12,810 people · 2019
Highest in the city: 57.04999999999998 µg/L — BUTLER CO RWD 6 · 2,655 people · 2019 | 4/4 | SYR4 |
| Dichloroacetic Acid | 39.650000000000006 µg/L No EPA limit set Highest in the city: BUTLER CO RWD 1 · 782 people · 2019 | 3/4 | SYR4 |
| Chloroform | 36.20000000000003 µg/L No EPA limit set Highest in the city: BUTLER CO RWD 1 · 782 people · 2019 | 3/4 | SYR4 |
| Trichloroacetic Acid | 19 µg/L No EPA limit set Highest in the city: BUTLER CO RWD 2 · 1,534 people · 2019 | 3/4 | SYR4 |
| Bromodichloromethane | 16.69999999999999 µg/L No EPA limit set Highest in the city: BUTLER CO RWD 6 · 2,655 people · 2019 | 3/4 | SYR4 |
| Lead | 9.959999999999994 µg/L 66% of the EPA limit 15 µg/L Main supplier: EL DORADO, CITY OF · 12,810 people · 2019
Highest in the city: 11.799999999999997 µg/L — BUTLER CO RWD 6 · 2,655 people · 2018 | 4/4 | SYR4 |
| Dibromochloromethane | 8.55 µg/L No EPA limit set Highest in the city: BUTLER CO RWD 6 · 2,655 people · 2019 | 3/4 | SYR4 |
| Monochloroacetic Acid | 7.499999999999986 µg/L No EPA limit set Highest in the city: BUTLER CO RWD 6 · 2,655 people · 2019 | 3/4 | SYR4 |
| Monobromoacetic Acid | 2.594999999999999 µg/L No EPA limit set Highest in the city: BUTLER CO RWD 6 · 2,655 people · 2019 | 3/4 | SYR4 |
| Dibromoacetic Acid | 2.3899999999999997 µg/L No EPA limit set Highest in the city: BUTLER CO RWD 2 · 1,534 people · 2019 | 3/4 | SYR4 |
| Bromoform | 1.8599999999999994 µg/L No EPA limit set Highest in the city: BUTLER CO RWD 6 · 2,655 people · 2019 | 1/4 | SYR4 |
| Selenium | 1.7850000000000001 µg/L 3.6% of the EPA limit 50 µg/L Main supplier: EL DORADO, CITY OF · 12,810 people · 2019 | 1/4 | SYR4 |
| Arsenic | 1.7 µg/L 17% of the EPA limit 10 µg/L Main supplier: EL DORADO, CITY OF · 12,810 people · 2019 | 1/4 | SYR4 |
| Chromium | 1.285 µg/L 1.3% of the EPA limit 100 µg/L Main supplier: EL DORADO, CITY OF · 12,810 people · 2019 | 1/4 | SYR4 |
| Combined Radium (-226 And -228) | 0.9000 pCi/L 18% of the EPA limit 5 pCi/L Main supplier: EL DORADO, CITY OF · 12,810 people · 2014 | 1/4 | SYR4 |
| Atrazine | 0.4750 µg/L 16% of the EPA limit 3 µg/L Main supplier: EL DORADO, CITY OF · 12,810 people · 2019 | 1/4 | SYR4 |
| Lead | 0.0046 mg/L 31% of the EPA limit 0.0150 mg/L Main supplier: EL DORADO, CITY OF · 12,810 people · 2024 | 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 El Dorado
| Supplier | Population served |
|---|---|
| EL DORADO, CITY OF | 12,810 |
| BUTLER CO RWD 6 | 2,655 |
| BUTLER CO RWD 2 | 1,534 |
| BUTLER CO RWD 1 | 782 |
Frequently asked questions about El Dorado tap water
Is El Dorado tap water safe to drink?
EPA testing detected 22 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?
4 public water suppliers report drinking-water monitoring for El Dorado, Kansas 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, Barium, Total Haloacetic Acids (HAA5). 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.