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Hinckley Town Water System

What EPA’s and Utah’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
630 people
Connections
311
Water source
Groundwater
Based in
Hinckley, UT
County
Millard
Owner
Local government
The ZIP code it serves

84635

The short answer

1 result is above EPA’s legal limit, and 1 more is above the health goal. The worst: Arsenic, above the legal limit. 5 health-based violations since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 2004 to 2025.

Copper: EPA’s file records a utility’s copper only when it exceeds the action level. The last here was 1.4 ppm, for the period ending June 30, 1994. None since is on file, so it is not counted as a current finding.

Arsenic, fluoride, chromium (total) and nitrate: Utah’s own results, samples taken from Jan. 15, 2020 to Sept. 29, 2026, with EPA’s 2012 to 2019 file for earlier years.

Total trihalomethanes (TTHM) and haloacetic acids (HAA5): EPA’s compliance monitoring file, samples taken from Aug. 21, 2012 to Aug. 22, 2019. Newer results are in the utility’s annual water quality report.

Above the legal limit1

Arsenic

Comes from the source

Above the legal limit

16.3ppb

Highest yearly average, 2020 to 2026

2026 average: 7.4 ppb

Averaged by year, the highest was 16.3 ppb, in 2024, above EPA’s legal limit of 10 ppb. Its highest single sample was 52.3 ppb. In 2026, the latest year on file, its five samples averaged 7.4 ppb. EPA recorded a violation for arsenic at this utility in 2023. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 16.1 ppb, in 2015.

What handles it

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

Above the health goal1

Lead

Comes from pipes, often your own

Above the health goal

3.1ppb

90th percentile, 2023 to 2025

In the latest period, 9 in 10 homes sampled were at or below 3.1 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 limits2

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.64ppm

Highest yearly average, 2021 to 2025

2025, one sample: 0.42 ppm

Averaged by year, the highest was 0.64 ppm, in 2021, below EPA’s legal limit of 4.0 ppm. In 2025, the latest year on file, its one sample was 0.42 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.5 ppm, in 2013.

What handles it

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

8.6ppb

Highest yearly average, 2012 to 2019

2019, one sample: 0.7 ppb

Averaged by year, the highest was 8.6 ppb, in 2018, below EPA’s legal limit of 80 ppb. In 2019, the latest year on file, its one sample was 0.7 ppb.

What handles it

  • NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
  • NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”
3 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Chromium (total)
  • Haloacetic acids (HAA5)
  • Nitrate

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: Arsenic (Pentavalent)<=50 ppb Reduction, Lead Reduction

    For: Arsenic, Lead

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

  • NSF/ANSI 58

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

    For: Arsenic, Lead

    Other certifiers’ wording: 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

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageDec. 1, 2023 to Dec. 31, 20230.011 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageNov. 1, 2023 to Nov. 30, 20230.011 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageOct. 1, 2023 to Oct. 31, 20230.011 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageSept. 1, 2023 to Sept. 30, 20230.011 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJan. 1, 2023 to Jan. 31, 20230.011 MG/LResolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 12 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Arsenic, fluoride, chromium (total) and nitrate results here are Utah’s own from 2020 on, with EPA’s national file for 2012 to 2019. Total trihalomethanes (TTHM) and haloacetic acids (HAA5) come from EPA’s file alone, which ends in 2019. Hinckley Town Water System’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; Utah’s results run from Jan. 15, 2020 to Sept. 29, 2026; EPA’s compliance samples are from Aug. 21, 2012 to Aug. 22, 2019.

Testing your own tap

Hinckley Town Water System’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 Utah certifies.

The lab Utah certifies closest to the area Hinckley Town Water System serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Central Utah Public Health Laboratory

    Richfield, UT · about 55 miles

    Certified for bacteria, nitrate

    (435) 896-5451

All 60 certified labs for Utah

Sources

PWSID UTAH14004. Rebuilt from EPA data on Oct. 18, 2026.

Also in Millard County

All Utah utilities

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