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Cowley Co RWD 8

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
50 people
Connections
20
Water source
Surface water bought from another system
Based in
Winfield, KS
County
Cowley
Owner
Local government

The short answer

2 results are 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 handles it

What was found

Haloacetic acids (HAA5) and total trihalomethanes (TTHM): Kansas’s own results, samples taken from Aug. 3, 2020 to July 8, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the limit’s level, no violation recorded2

Haloacetic acids (HAA5)

Forms or is added in treatment

Above the limit’s level, no violation

100ppb

Highest yearly average, 2020 to 2026

2026 average: 12.8 ppb

Averaged by year, the highest was 100 ppb, in 2024, above EPA’s legal limit of 60 ppb. In 2026, the latest year on file, its three samples averaged 12.8 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 11 ppb, in 2019.

What handles it

No certification claim covers this compound yet.

Total trihalomethanes (TTHM)

Forms or is added in treatment

Above the limit’s level, no violation

100ppb

Highest yearly average, 2020 to 2026

2026 average: 11 ppb

Averaged by year, the highest was 100 ppb, in 2024, above EPA’s legal limit of 80 ppb. In 2026, the latest year on file, its three samples averaged 11 ppb. EPA judges this limit on running averages at each sampling point, and recorded no violation for total trihalomethanes (TTHM) 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.

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

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.”

  • NSF/ANSI 53

    Claim: Trihalomethanes (TTHM) Reduction

    For: Total trihalomethanes (TTHM)

    Other certifiers’ wording: VOC Reduction

  • NSF/ANSI 58

    Claim: Trihalomethanes (TTHM) Reduction

    For: Total trihalomethanes (TTHM)

At the tap, or for the whole house?

These come with the water itself, so a whole-house system certified for the same claims treats every tap and shower. A filter at the tap treats drinking water for much less. 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

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Violations since 2016

No health-based violations on file with EPA since 2016. There are 15 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. Cowley Co RWD 8’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. 3, 2020 to July 8, 2026.

Testing your own tap

Cowley Co RWD 8’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.

No lab Kansas certifies is within 75 miles of the area Cowley Co RWD 8 serves on the state’s list. Some take samples by mail; the state’s page lists them all.

All 47 certified labs for Kansas

Sources

PWSID KS2003515. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Cowley County

All Kansas utilities

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