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City of Natoma

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
300 people
Connections
208
Water source
Groundwater
Based in
Natoma, KS
County
Osborne
Owner
Local government
Hardness
Very hard
The ZIP code it serves

67651

The short answer

3 results are above the health goal. The worst: Nitrate, 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 2024.

Nitrate, arsenic, total trihalomethanes (TTHM), haloacetic acids (HAA5), fluoride and chromium (total): Kansas’s own results, samples taken from Jan. 6, 2020 to May 20, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the health goal3

Nitrate

Comes from the source

Above the health goal

15ppm

Highest sample; found in 33 of 33

2026 average: 3.9 ppm

From 2021 to 2026, three samples were above EPA’s legal limit of 10 ppm, the highest 15 ppm in 2026. One came back under the limit on the next sample at the same point and two have no follow-up sample on file within 30 days. 10 ppm is also EPA’s health goal. That was also the latest year on file, and its five samples averaged 3.9 ppm. EPA recorded no violation for nitrate at this utility since 2020. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 11 ppm, in 2017.

What handles it

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

Arsenic

Comes from the source

Above the health goal

3.1ppb

Highest yearly average, 2021 to 2026

2026, one sample: 1.6 ppb

Averaged by year, the highest was 3.1 ppb, in 2023: below EPA’s legal limit of 10 ppb, but above its health goal of zero. Its highest single sample was 3.4 ppb. In 2026, the latest year on file, its one sample was 1.6 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 9.5 ppb, in 2012.

What handles it

  • NSF/ANSI 58 look for “Arsenic (Pentavalent)<=50 ppb Reduction”
  • NSF/ANSI 53 look for “Arsenic (Pentavalent)<=50 ppb Reduction”

Lead

Comes from pipes, often your own

Above the health goal

2.1ppb

90th percentile, 2022 to 2024

In the latest period, 9 in 10 homes sampled were at or below 2.1 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 limits4

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

48.3ppb

Highest yearly average, 2020 to 2024

2024 average: 32.3 ppb

Averaged by year, the highest was 48.3 ppb, in 2022, below EPA’s legal limit of 80 ppb. Its highest single sample was 75 ppb. In 2024, the latest year on file, its four samples averaged 32.3 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 110 ppb, in 2018.

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

19.5ppb

Highest yearly average, 2020 to 2024

2024 average: 19 ppb

Averaged by year, the highest was 19.5 ppb, in 2023, below EPA’s legal limit of 60 ppb. Its highest single sample was 30 ppb. In 2024, the latest year on file, its four samples averaged 19 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 22 ppb, in 2015.

What handles it

No certification claim covers this compound yet.

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.38ppm

Highest yearly average, 2021 to 2026

Averaged by year, the highest was 0.38 ppm, in 2026, 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 0.32 ppm, in 2012.

What handles it

Chromium (total)

Comes from the source

Below EPA’s limits

2.2ppb

Highest yearly average, 2021 to 2026

2026, one sample: 1.8 ppb

Averaged by year, the highest was 2.2 ppb, in 2021, below EPA’s legal limit of 100 ppb. Its highest single sample was 2.4 ppb. In 2026, the latest year on file, its one sample was 1.8 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 7.0 ppb, in 2012.

What handles it

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

    Claims: Nitrate/Nitrite (30 ppm challenge), Arsenic (Pentavalent)<=50 ppb Reduction, Lead Reduction

    For: Nitrate, Arsenic, Lead

    Other certifiers’ wording: Arsenic (III) (50 ppb influent level)

  • NSF/ANSI 58

    Claims: Nitrate/Nitrite Reduction, Arsenic (Pentavalent)<=50 ppb Reduction, Lead Reduction

    For: Nitrate, Arsenic, Lead

    Other certifiers’ wording: Nitrate; Arsenic (Pentavalent)<=300 ppb Reduction; Arsenic (V) (300 ppb influent level)

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 reverse osmosis systems, ranked

The best water filters for lead, ranked

Hardness

Very hard, typically 790 mg/L (46.2 grains per gallon), across 3 sampling points, 2015 to 2026.

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 46.2 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. There are 17 monitoring or reporting violations: a sample missed, late or not reported.

What this report can’t tell you

  • Everything else. Nitrate, arsenic, total trihalomethanes (TTHM), haloacetic acids (HAA5), fluoride and chromium (total) results here are Kansas’s own from 2020 on, with EPA’s national file for 2012 to 2019. City of Natoma’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. 6, 2020 to May 20, 2026.

Testing your own tap

City of Natoma’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 City of Natoma 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 KS2014106. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Osborne County

All Kansas utilities

What to do next