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City of Lecompton

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
592 people
Connections
266
Water source
Surface water bought from another system
Based in
Lecompton, KS
County
Douglas
Owner
Local government
Hardness
Hard
The ZIP code it serves

66050

The short answer

1 result is above the health goal. The worst: Lead, above the health goal. No health-based violations on file since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 2007 to 2023.

Total trihalomethanes (TTHM), haloacetic acids (HAA5), fluoride, nitrate, chromium (total) and arsenic: Kansas’s own results, samples taken from Feb. 10, 2020 to Sept. 17, 2025, with EPA’s 2012 to 2019 file for earlier years.

Above the health goal1

Lead

Comes from pipes, often your own

Above the health goal

4.8ppb

90th percentile, 2021 to 2023

In the latest period, 9 in 10 homes sampled were at or below 4.8 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 limits5

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

63ppb

Highest yearly average, 2020 to 2025

2025, one sample: 12 ppb

Averaged by year, the highest was 63 ppb, in 2023, below EPA’s legal limit of 80 ppb. In 2025, the latest year on file, its one sample was 12 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 61 ppb, in 2016.

What handles it

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

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

24ppb

Highest yearly average, 2020 to 2025

2025, one sample: 13 ppb

Averaged by year, the highest was 24 ppb, in 2023, below EPA’s legal limit of 60 ppb. In 2025, the latest year on file, its one sample was 13 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 14 ppb, in 2016.

What handles it

No certification claim covers this compound yet.

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.27ppm

Highest yearly average, 2020 to 2023

Averaged by year, the highest was 0.27 ppm, in 2023, below EPA’s legal limit of 4.0 ppm. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.27 ppm, in 2014.

What handles it

Nitrate

Comes from the source

Below EPA’s limits

0.5ppm

Highest sample; found in 1 of 8

2025: not found

The highest sample, in 2020, was 0.5 ppm, below EPA’s legal limit of 10 ppm. In 2025, the latest year on file, it wasn’t found in its one sample. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 1.4 ppm, in 2013.

What handles it

  • NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
  • NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”

Chromium (total)

Comes from the source

Below EPA’s limits

3.9ppb

Highest yearly average, 2020 to 2023

Averaged by year, the highest was 3.9 ppb, in 2023, below EPA’s legal limit of 100 ppb. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 1.6 ppb, in 2017.

What handles it

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

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

Hardness

Hard, 130 mg/L (7.6 grains per gallon), at its one sampling point, 2017 to 2023.

Hardness is calcium and magnesium. EPA sets no limit for it: it shows up as scale on fixtures and in water heaters, and as soap that won’t lather. USGS calls water above 60 mg/L moderately hard, above 120 hard and above 180 very hard.

Softeners compared at 7.6 grains per gallon, salt includedSoftener or salt-free conditioner?Kansas water hardness, utility by utility

Violations since 2016

No health-based violations on file with EPA since 2016.

What this report can’t tell you

  • Everything else. Total trihalomethanes (TTHM), haloacetic acids (HAA5), fluoride, nitrate, chromium (total) and arsenic results here are Kansas’s own from 2020 on, with EPA’s national file for 2012 to 2019. City of Lecompton’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 Feb. 10, 2020 to Sept. 17, 2025.

Testing your own tap

City of Lecompton’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 3 labs Kansas certifies closest to the area City of Lecompton serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Johnson County Water Quality Laboratory

    Olathe, KS · about 31 miles

    Certified for bacteria, nitrate, lead and copper

    (913) 715-6950

  • Olathe Environmental Laboratory

    Olathe, KS · about 31 miles

    Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics

    (913) 971-8310

  • Eurofins Kansas City

    Lenexa, KS · about 38 miles

    Certified for bacteria

    (319) 595-2009

All 47 certified labs for Kansas

Sources

PWSID KS2004501. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Douglas County

All Kansas utilities

What to do next