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Tap water quality report

El Dorado, KS

EPA monitoring detected 22 contaminants across the 4 water suppliers serving El Dorado. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

4
water suppliers
17,781
people served
22
contaminants found
Kansas rankings Lead in Kansas PFAS in Kansas

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.

ContaminantLevel vs EPA limitSuppliersSource
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
353 µg/L 27%
of the EPA limit 1300 µg/L
Main supplier: EL DORADO, CITY OF · 12,810 people · 2019
Highest in the city: 525.5 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: 63.05 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: 57.05 µg/L — BUTLER CO RWD 6 · 2,655 people · 2019
4/4 SYR4
Dichloroacetic Acid
39.65 µg/L
No EPA limit set
Highest in the city: BUTLER CO RWD 1 · 782 people · 2019
3/4 SYR4
Chloroform
36.2 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
16.7 µg/L
No EPA limit set
Highest in the city: BUTLER CO RWD 6 · 2,655 people · 2019
3/4 SYR4
Lead
9.96 µg/L 66%
of the EPA limit 15 µg/L
Main supplier: EL DORADO, CITY OF · 12,810 people · 2019
Highest in the city: 11.8 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
7.5 µg/L
No EPA limit set
Highest in the city: BUTLER CO RWD 6 · 2,655 people · 2019
3/4 SYR4
Monobromoacetic Acid
2.595 µg/L
No EPA limit set
Highest in the city: BUTLER CO RWD 6 · 2,655 people · 2019
3/4 SYR4
Dibromoacetic Acid
2.39 µg/L
No EPA limit set
Highest in the city: BUTLER CO RWD 2 · 1,534 people · 2019
3/4 SYR4
Bromoform
1.86 µg/L
No EPA limit set
Highest in the city: BUTLER CO RWD 6 · 2,655 people · 2019
1/4 SYR4
Selenium
1.785 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

SupplierPopulation 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.