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Wilson Co RWD 4

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
293 people
Connections
126
Water source
Surface water bought from another system
Based in
Neodesha, KS
County
Wilson
Owner
Local government
The ZIP code it serves

66757

The short answer

2 results are above EPA’s legal limit. The worst: Lead, above the action level. 4 health-based violations since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 2004 to 2023.

Haloacetic acids (HAA5) and total trihalomethanes (TTHM): Kansas’s own results, samples taken from Jan. 19, 2020 to Jan. 20, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the legal limit2

Lead

Comes from pipes, often your own

Above the action level

15.4ppb

90th percentile, 2023

In the latest period, 9 in 10 homes sampled were at or below 15.4 ppb, above EPA’s action level of 15 ppb. The action level drops to 10 ppb on Nov. 1, 2027, and this result is at or above that. EPA’s health goal for lead is zero.

What handles it

Haloacetic acids (HAA5)

Forms or is added in treatment

Above the legal limit

30ppb

Highest yearly average, 2020 to 2026

2026, one sample: 25 ppb

Averaged by year, the highest was 30 ppb, in 2021, below EPA’s legal limit of 60 ppb. Its highest single sample was 39 ppb. In 2026, the latest year on file, its one sample was 25 ppb. EPA judges this limit at each sampling point, and recorded a violation for haloacetic acids (HAA5) at this utility in 2020. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 77 ppb, in 2014, and EPA recorded a violation in 2019.

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

56ppb

Highest yearly average, 2020 to 2026

2026, one sample: 34 ppb

Averaged by year, the highest was 56 ppb, in 2020, below EPA’s legal limit of 80 ppb. Its highest single sample was 68 ppb. In 2026, the latest year on file, its one sample was 34 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 81 ppb, in 2014.

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, AverageJuly 1, 2020 to Sept. 30, 20200.068 MG/LResolved
Total Haloacetic Acids (HAA5)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageApril 1, 2020 to June 30, 20200.066 MG/LResolved
Total Haloacetic Acids (HAA5)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJan. 1, 2020 to March 31, 20200.066 MG/LResolved
Total Haloacetic Acids (HAA5)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageOct. 1, 2019 to Dec. 31, 20190.062 MG/LResolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 16 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. Wilson Co RWD 4’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 Jan. 19, 2020 to Jan. 20, 2026.

Testing your own tap

Wilson Co RWD 4’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 Wilson Co RWD 4 serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Pace Analytical Services, Inc - Frontenac

    Frontenac, KS · about 55 miles

    Certified for bacteria

    (913) 599-5665

All 47 certified labs for Kansas

Sources

PWSID KS2020504. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Wilson County

All Kansas utilities

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