Skip to content
TapBuff
ZIP

Hoover Hills WSD

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
662 people
Connections
256
Water source
Surface water bought from another system
Based in
Golden, CO
County
Boulder
Owner
Local government
The ZIP code it serves

80303

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

Total trihalomethanes (TTHM) and haloacetic acids (HAA5): Colorado’s own results, samples taken from Feb. 19, 2020 to Aug. 3, 2026, with EPA’s 2012 to 2019 file for earlier years.

Below EPA’s limits2

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

45.6ppb

Highest yearly average, 2020 to 2026

2026 average: 40.6 ppb

Averaged by year, the highest was 45.6 ppb, in 2024, below EPA’s legal limit of 80 ppb. Its highest single sample was 53.4 ppb. In 2026, the latest year on file, its three samples averaged 40.6 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 68 ppb, in 2017.

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

32.5ppb

Highest yearly average, 2020 to 2026

2026 average: 27.4 ppb

Averaged by year, the highest was 32.5 ppb, in 2023, below EPA’s legal limit of 60 ppb. Its highest single sample was 41.3 ppb. In 2026, the latest year on file, its three samples averaged 27.4 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 48.2 ppb, in 2014.

What handles it

No certification claim covers this compound yet.

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.

What this report can’t tell you

  • Everything else. Total trihalomethanes (TTHM) and haloacetic acids (HAA5) results here are Colorado’s own from 2020 on, with EPA’s national file for 2012 to 2019. Hoover Hills WSD’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. 19, 2020 to Aug. 3, 2026.

Testing your own tap

Hoover Hills WSD’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 Hoover Hills WSD serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Hazen Research

    Golden, CO · about 11 miles

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

  • Eurofins Denver

    Arvada, CO · about 14 miles

    Certified for nitrate, minerals and other inorganics, organic chemicals, PFAS

  • Eurofins Reservoirs Environmental, Inc.

    Arvada, CO · about 14 miles

    Certified for bacteria

All 54 certified labs for Colorado

Sources

PWSID CO0107352. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Boulder County

All Colorado utilities

What to do next