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Butler Co RWD 7

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
1,455 people
Connections
368
Water source
Surface water bought from another system
Based in
Whitewater, KS
County
Butler
Owner
Local government
The 4 ZIP codes it serves

66840, 67123, 67144, 67154

The short answer

1 result is above EPA’s legal limit, and 1 more is above the health goal. The worst: Haloacetic acids (HAA5), above the legal limit. 4 health-based violations since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 2007 to 2024.

Haloacetic acids (HAA5) and total trihalomethanes (TTHM): Kansas’s own results, samples taken from March 13, 2020 to July 27, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the legal limit1

Haloacetic acids (HAA5)

Forms or is added in treatment

Above the legal limit

77.3ppb

Highest yearly average, 2020 to 2026

2026 average: 44 ppb

Averaged by year, the highest was 77.3 ppb, in 2022, above EPA’s legal limit of 60 ppb. Its highest single sample was 220 ppb. In 2026, the latest year on file, its three samples averaged 44 ppb. EPA recorded violations for haloacetic acids (HAA5) at this utility in 2022 and 2023. 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.

Above the health goal1

Lead

Comes from pipes, often your own

Above the health goal

1.4ppb

90th percentile, 2022 to 2024

In the latest period, 9 in 10 homes sampled were at or below 1.4 ppb, below EPA’s action level of 15 ppb. The action level drops to 10 ppb on Nov. 1, 2027. EPA’s health goal for lead is zero.

What handles it

Below EPA’s limits1

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

33.7ppb

Highest yearly average, 2020 to 2026

Averaged by year, the highest was 33.7 ppb, in 2026, below EPA’s legal limit of 80 ppb. Its highest single sample was 42 ppb. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 110 ppb, in 2015.

What handles it

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

What handles it

A certification covers specific claims, not a whole standard. Look for these claims on the certifier’s listing, not the box. Wording varies a little: NSF writes “Lead Reduction,” WQA just “Lead.”

At the tap, or for the whole house?

Lead and copper usually come from pipes and fixtures inside or near your home. A whole-house system sits where water enters, so it cannot catch what your own plumbing adds after it. For those, the filter that counts is the one at the tap. How whole-house systems compare.

Filters with those claims on a certifier’s listing

Disclosure: TapBuff earns a commission if you buy through some links on this page. It does not change which standard or filter we name. As an Amazon Associate, TapBuff earns from qualifying purchases. How TapBuff makes money

Compare five-year costs

The best water filters for lead, ranked

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
Total Haloacetic Acids (HAA5)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageApril 1, 2023 to June 30, 20230.075 MG/LResolved
Total Haloacetic Acids (HAA5)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJan. 1, 2023 to March 31, 20230.078 MG/LResolved
Total Haloacetic Acids (HAA5)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageOct. 1, 2022 to Dec. 31, 20220.077 MG/LResolved
Total Haloacetic Acids (HAA5)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJuly 1, 2022 to Sept. 30, 20220.073 MG/LResolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 7 monitoring or reporting violations not shown.

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 7’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 March 13, 2020 to July 27, 2026.

Testing your own tap

Butler Co RWD 7’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 2 labs Kansas certifies closest to the area Butler Co RWD 7 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 26 miles

    Certified for bacteria, nitrate, minerals and other inorganics, organic chemicals, disinfection byproducts

    (316) 618-8787

  • Pace Analytical Services, Inc. - Salina

    Salina, KS · about 70 miles

    Certified for bacteria, nitrate

    (913) 599-5665

All 47 certified labs for Kansas

Sources

PWSID KS2001531. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Butler County

All Kansas utilities

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