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Hamilton 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
80 people
Connections
41
Water source
Groundwater
Based in
Kendall, KS
County
Hamilton
Owner
Local government
Hardness
Hard
The ZIP code it serves

67857

The short answer

Nothing in EPA’s and Kansas’s records for this utility is above a health goal. That covers nitrate, arsenic and other regulated chemicals, plus lead and copper, not everything. 2 health-based violations since 2016.

What was found

Fluoride, arsenic, chromium (total), haloacetic acids (HAA5), nitrate and total trihalomethanes (TTHM): Kansas’s own results, samples taken from April 14, 2020 to July 8, 2026, with EPA’s 2012 to 2019 file for earlier years.

Below EPA’s limits1

Fluoride

Forms or is added in treatment

Below EPA’s limits

1.7ppm

Highest yearly average, 2022 to 2025

2025, one sample: 1.7 ppm

Averaged by year, the highest was 1.7 ppm, in 2022, below EPA’s legal limit of 4.0 ppm. In 2025, the latest year on file, its one sample was 1.7 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 1.0 ppm, in 2019.

What handles it

6 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic
  • Chromium (total)
  • Haloacetic acids (HAA5)
  • Lead
  • Nitrate
  • Total trihalomethanes (TTHM)

Hardness

Hard, 170 mg/L (9.9 grains per gallon), at its one sampling point, 2016 to 2025.

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 9.9 grains per gallon, salt includedSoftener or salt-free conditioner?Kansas water hardness, utility by utility

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
Groundwater RuleA significant problem found in a state inspection was not fixed on time.EPA: Failure To Address DeficiencyMay 22, 2021—Resolved
Groundwater RuleA significant problem found in a state inspection was not fixed on time.EPA: Failure To Address DeficiencyMay 22, 2021—Resolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 13 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Fluoride, arsenic, chromium (total), haloacetic acids (HAA5), nitrate and total trihalomethanes (TTHM) results here are Kansas’s own from 2020 on, with EPA’s national file for 2012 to 2019. Hamilton 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 April 14, 2020 to July 8, 2026.

Testing your own tap

Hamilton 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.

No lab Kansas certifies is within 75 miles of the area Hamilton Co RWD 1 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 KS2007503. Rebuilt from EPA data on Oct. 18, 2026.

Nearby

All Kansas utilities

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