City of Washington

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: 1,065 people
Connections: 676
Water source: Groundwater
Based in: Washington, KS
County: Washington
Owner: Local government
Hardness: Hard

The ZIP code it serves

66968

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. No health-based violations on file since 2016.

What was found

Copper: EPA’s file records a utility’s copper only when it exceeds the action level. The last here was 1.5 ppm, for the period ending June 30, 1994. None since is on file, so it is not counted as a current finding.

Nitrate, total trihalomethanes (TTHM), haloacetic acids (HAA5), fluoride, chromium (total) and arsenic: Kansas’s own results, samples taken from April 20, 2020 to Aug. 17, 2026, with EPA’s 2012 to 2019 file for earlier years.

Below EPA’s limits5

Nitrate

Comes from the source

Below EPA’s limits

7.2ppm

Highest sample; found in 10 of 10

2026 average: 7.0 ppm

The highest sample, in 2026, was 7.2 ppm, below EPA’s legal limit of 10 ppm. That was also the latest year on file, and its two samples averaged 7.0 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 6.7 ppm, in 2012.

What handles it

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

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

6.4ppb

Highest yearly average, 2020 to 2026

2026, one sample: 5.6 ppb

Averaged by year, the highest was 6.4 ppb, in 2024, below EPA’s legal limit of 80 ppb. In 2026, the latest year on file, its one sample was 5.6 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 4.7 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

3.6ppb

Highest yearly average, 2020 to 2026

2026, one sample: 2.2 ppb

Averaged by year, the highest was 3.6 ppb, in 2024, below EPA’s legal limit of 60 ppb. In 2026, the latest year on file, its one sample was 2.2 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 2.1 ppb, in 2018.

What handles it

No certification claim covers this compound yet.

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.24ppm

Highest yearly average, 2020 to 2026

2026: not found

Averaged by year, the highest was 0.24 ppm, in 2020, below EPA’s legal limit of 4.0 ppm. In 2026, the latest year on file, it wasn’t found in its one sample. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.2 ppm, in 2014.

What handles it

NSF/ANSI 58 look for “Fluoride Reduction”
NSF/ANSI 53 look for “Fluoride”

Chromium (total)

Comes from the source

Below EPA’s limits

1.5ppb

Highest yearly average, 2020 to 2026

2026: not found

Averaged by year, the highest was 1.5 ppb, in 2023, below EPA’s legal limit of 100 ppb. In 2026, the latest year on file, it wasn’t found in its one sample. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 2.3 ppb, in 2017.

What handles it

NSF/ANSI 58 look for “Chromium (Hexavalent) Reduction”
NSF/ANSI 53 look for “Chromium Reduction”

2 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.

Arsenic
Lead

Hardness

Hard, 140 mg/L (8.2 grains per gallon), at its one sampling point, 2017 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 8.2 grains per gallon, salt included Softener 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. Nitrate, total trihalomethanes (TTHM), haloacetic acids (HAA5), fluoride, chromium (total) and arsenic results here are Kansas’s own from 2020 on, with EPA’s national file for 2012 to 2019. City of Washington’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 20, 2020 to Aug. 17, 2026.

Testing your own tap

City of Washington’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 2 labs Kansas certifies closest to the area City of Washington serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

LandIntel Solutions, LLC
Scandia, KS · about 37 miles
Certified for bacteria
(785) 335-2054
Irwin Army Community Hospital-Water Laboratory-PH-EH
Fort Riley, KS · about 53 miles
Certified for bacteria
(785) 239-7516