Butler Co RWD 1

What EPA’s and Kansas’s records show in this utility’s water: nitrate, arsenic and other regulated chemicals; lead and copper; and violations since 2016, with the certification that handles each result.

Serves: 782 people
Connections: 249
Water source: Surface water bought from another system
Based in: El Dorado, KS
County: Butler
Owner: Local government

The ZIP code it serves

67042

The short answer

1 result is above the limit’s level with no violation recorded. The worst: Haloacetic acids (HAA5), above the limit’s level, no violation. No health-based violations on file since 2016.

What was found

Haloacetic acids (HAA5) and total trihalomethanes (TTHM): Kansas’s own results, samples taken from Aug. 9, 2020 to May 19, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the limit’s level, no violation recorded1

Haloacetic acids (HAA5)

Forms or is added in treatment

Above the limit’s level, no violation

108ppb

Highest yearly average, 2020 to 2026

2026 average: 42 ppb

Averaged by year, the highest was 108 ppb, in 2022, above EPA’s legal limit of 60 ppb. Its highest single sample was 190 ppb. In 2026, the latest year on file, its two samples averaged 42 ppb. EPA judges this limit on running averages at each sampling point, and recorded no violation for haloacetic acids (HAA5) at this utility since 2020. Results like these with no violation often include water sampled before treatment or blending; the utility’s annual report says what reaches the tap. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 140 ppb, in 2015.

What handles it

No certification claim covers this compound yet.

Below EPA’s limits1

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

37ppb

Highest yearly average, 2020 to 2026

2026 average: 28 ppb

Averaged by year, the highest was 37 ppb, in 2021, below EPA’s legal limit of 80 ppb. In 2026, the latest year on file, its two samples averaged 28 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 100 ppb, in 2015.

What handles it

NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”

One compound tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.

Lead

Violations since 2016

No health-based violations on file with EPA since 2016. There are 20 monitoring or reporting violations: a sample missed, late or not reported.

What this report can’t tell you

Everything else. Haloacetic acids (HAA5) and total trihalomethanes (TTHM) results here are Kansas’s own from 2020 on, with EPA’s national file for 2012 to 2019. Butler Co RWD 1’s own annual report, which it must send you every year, has the contaminants this page does not show.
Your own plumbing. Lead results are the 90th percentile across homes the utility samples. Your home’s service line, solder and fixtures decide yours. A certified lab test is the only way to know.
What it means for your health. This page reports what the records show and EPA’s limits and goals; it is not medical advice. If you are worried about a health effect, talk to a doctor or your local health department.
Anything after the latest data. SDWIS data is from 2026 Q3; UCMR 5 didn’t sample this utility; Kansas’s results run from Aug. 9, 2020 to May 19, 2026.

Testing your own tap

Butler Co RWD 1’s results are for the water it sends out. What your own service line, solder and fixtures add shows up only in a test of your tap, by a lab Kansas certifies.

The lab Kansas certifies closest to the area Butler Co RWD 1 serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

Meridian Analytical Laboratory - Wichita
Wichita, KS · about 30 miles
Certified for bacteria, nitrate, minerals and other inorganics, organic chemicals, disinfection byproducts
(316) 618-8787

All 47 certified labs for Kansas