Kersey WD

What EPA’s and Colorado’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: 2,101 people
Connections: 502
Water source: Surface water bought from another system
Based in: Kersey, CO
County: Weld
Owner: Local government

The ZIP code it serves

80644

The short answer

Nothing in EPA’s and Colorado’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

Haloacetic acids (HAA5) and total trihalomethanes (TTHM): Colorado’s own results, samples taken from Feb. 4, 2020 to Aug. 3, 2026, with EPA’s 2012 to 2019 file for earlier years.

Below EPA’s limits2

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

44.3ppb

Highest yearly average, 2020 to 2026

2026 average: 34.7 ppb

Averaged by year, the highest was 44.3 ppb, in 2023, below EPA’s legal limit of 60 ppb. Its highest single sample was 54.6 ppb. In 2026, the latest year on file, its three samples averaged 34.7 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 45 ppb, in 2014.

What handles it

No certification claim covers this compound yet.

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

47.5ppb

Highest yearly average, 2020 to 2026

2026 average: 28.4 ppb

Averaged by year, the highest was 47.5 ppb, in 2023, below EPA’s legal limit of 80 ppb. Its highest single sample was 55.7 ppb. In 2026, the latest year on file, its three samples averaged 28.4 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 61.4 ppb, in 2014.

What handles it

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

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

Lead

Violations since 2016

No health-based violations on file with EPA since 2016. There are 3 monitoring or reporting violations: a sample missed, late or not reported.

What this report can’t tell you

Everything else. Haloacetic acids (HAA5) and total trihalomethanes (TTHM) results here are Colorado’s own from 2020 on, with EPA’s national file for 2012 to 2019. Kersey WD’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; Colorado’s results run from Feb. 4, 2020 to Aug. 3, 2026.

Testing your own tap

Kersey WD’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 Colorado certifies.

The 3 labs Colorado certifies closest to the area Kersey WD serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

IEH-Warren Analytical Laboratory
Greeley, CO · about 13 miles
Certified for bacteria
Weld County Department of Public Health & Environment
Greeley, CO · about 13 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, radioactivity
EAnalytics Laboratory
Loveland, CO · about 33 miles
Certified for bacteria