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Eden Valley Institute

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
91 people
Connections
26
Water source
Surface water
Based in
Loveland, CO
County
Larimer
Owner
Private
The ZIP code it serves

80538

The short answer

1 result is above the limit’s level with no violation recorded. The worst: Total trihalomethanes (TTHM), above the limit’s level, no violation. 6 health-based violations since 2016.

What handles it

What was found

Total trihalomethanes (TTHM), haloacetic acids (HAA5), nitrate, fluoride, arsenic and chromium (total): Colorado’s own results, samples taken from May 13, 2020 to Aug. 31, 2026, with EPA’s 2012 to 2019 file for earlier years.

Uranium: EPA’s compliance monitoring file, samples taken from Nov. 18, 2019 to Nov. 18, 2019. Newer results are in the utility’s annual water quality report.

Above the limit’s level, no violation recorded1

Total trihalomethanes (TTHM)

Forms or is added in treatment

Above the limit’s level, no violation

80.5ppb

Highest yearly average, 2020 to 2026

2026 average: 40.6 ppb

Averaged by year, the highest was 80.5 ppb, in 2021, above EPA’s legal limit of 80 ppb. Its highest single sample was 85 ppb. In 2026, the latest year on file, its three samples averaged 40.6 ppb. EPA judges this limit on running averages at each sampling point, and recorded no violation for total trihalomethanes (TTHM) at this utility since 2020. Results like these with no violation often include water sampled before treatment or blending; the utility’s annual report says what reaches the tap. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 51.3 ppb, in 2016.

What handles it

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

Below EPA’s limits3

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

31.5ppb

Highest yearly average, 2020 to 2026

2026 average: 31.2 ppb

Averaged by year, the highest was 31.5 ppb, in 2025, below EPA’s legal limit of 60 ppb. Its highest single sample was 48.2 ppb. In 2026, the latest year on file, its three samples averaged 31.2 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 34.3 ppb, in 2018.

What handles it

No certification claim covers this compound yet.

Nitrate

Comes from the source

Below EPA’s limits

0.3ppm

Highest sample; found in 6 of 6

2025, one sample: 0.069 ppm

The highest sample, in 2023, was 0.3 ppm, below EPA’s legal limit of 10 ppm. In 2025, the latest year on file, its one sample was 0.069 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 0.44 ppm, in 2014.

What handles it

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

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.11ppm

Highest yearly average, 2020 to 2022

2022: not found

Averaged by year, the highest was 0.11 ppm, in 2020, below EPA’s legal limit of 4.0 ppm. In 2022, 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 0.22 ppm, in 2018.

What handles it

4 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic
  • Chromium (total)
  • Lead
  • Uranium

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

    Claim: Trihalomethanes (TTHM) Reduction

    For: Total trihalomethanes (TTHM)

    Other certifiers’ wording: VOC Reduction

  • NSF/ANSI 58

    Claim: Trihalomethanes (TTHM) Reduction

    For: Total trihalomethanes (TTHM)

At the tap, or for the whole house?

These come with the water itself, so a whole-house system certified for the same claims treats every tap and shower. A filter at the tap treats drinking water for much less. 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

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
Surface Water Treatment RuleRequired treatment for surface water or groundwater was not met.EPA: Treatment Technique (SWTR and GWR)Aug. 1, 2025 to Aug. 31, 2025—Resolved
Lead and Copper Rule RevisionsThe required inventory of lead service lines was not completed or submitted on time.EPA: LSL InventoryOct. 17, 2024—Resolved
Interim Enhanced Surface Water Treatment RuleToo many readings in a month showed cloudiness above the filtration standard.EPA: Monthly Turbidity Exceed (Enhanced SWTR)Oct. 1, 2024 to Oct. 31, 2024—Resolved
Surface Water Treatment RuleRequired treatment for surface water or groundwater was not met.EPA: Treatment Technique (SWTR and GWR)Jan. 1, 2021 to Jan. 31, 2021—Resolved
Surface Water Treatment RuleRequired treatment for surface water or groundwater was not met.EPA: Treatment Technique (SWTR and GWR)May 1, 2020 to May 31, 2020—Resolved
Surface Water Treatment RuleRequired treatment for surface water or groundwater was not met.EPA: Treatment Technique (SWTR and GWR)April 1, 2020 to April 30, 2020—Resolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 153 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Total trihalomethanes (TTHM), haloacetic acids (HAA5), nitrate, fluoride, arsenic and chromium (total) results here are Colorado’s own from 2020 on, with EPA’s national file for 2012 to 2019. Uranium comes from EPA’s file alone, which ends in 2019. Eden Valley Institute’s own annual report, which it must send you every year, has newer results for those and 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 May 13, 2020 to Aug. 31, 2026; EPA’s compliance samples are from Nov. 18, 2019 to Nov. 18, 2019.

Testing your own tap

Eden Valley Institute’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 Eden Valley Institute serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • EAnalytics Laboratory

    Loveland, CO · under a mile

    Certified for bacteria

  • M.M.S Environmental Laboratories

    Fort Collins, CO · about 6 miles

    Certified for bacteria

  • Technology Laboratory, Inc.

    Fort Collins, CO · about 6 miles

    Certified for nitrate, minerals and other inorganics, organic chemicals

All 54 certified labs for Colorado

Sources

PWSID CO0135237. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Larimer County

All Colorado utilities

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