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Oak Haven Water Company

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
388 people
Connections
116
Water source
Groundwater
Based in
Midway, UT
County
Wasatch
Owner
Private
Hardness
Very hard
The ZIP code it serves

84049

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. 18 health-based violations since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 2023 to 2024.

Arsenic, fluoride, nitrate and chromium (total): Utah’s own results, samples taken from March 27, 2020 to Sept. 28, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the legal limit1

Arsenic

Comes from the source

Above the legal limit

35.8ppb

Highest yearly average, 2020 to 2026

2026 average: 2.8 ppb

Averaged by year, the highest was 35.8 ppb, in 2024, about 3.6 times EPA’s legal limit of 10 ppb. Its highest single sample was 139 ppb. In 2026, the latest year on file, its nine samples averaged 2.8 ppb. EPA recorded violations for arsenic at this utility in 2024, 2025 and 2026. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 36.6 ppb, in 2016. One result, 34,200 ppb on Nov. 9, 2020 in Utah’s results, is left out as a likely entry error: the typical result there is 26.5 ppb.

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

1.7ppb

90th percentile, 2024

In the latest period, 9 in 10 homes sampled were at or below 1.7 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

0.4ppm

Highest yearly average, 2026

Averaged by year, the highest was 0.4 ppm, in 2026, below EPA’s legal limit of 4.0 ppm. That is the only year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.6 ppm, in 2015.

What handles it

Nitrate

Comes from the source

Below EPA’s limits

0.4ppm

Highest sample; found in 3 of 4

2026 average: 0.36 ppm

The highest sample, in 2026, was 0.4 ppm, below EPA’s legal limit of 10 ppm. That was also the latest year on file, and its two samples averaged 0.36 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 0.65 ppm, in 2015.

What handles it

  • NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
  • NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”
One compound tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Chromium (total)

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

Hardness

Very hard, 342 mg/L (20 grains per gallon), at its one sampling point, in 2015.

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 20 grains per gallon, salt includedSoftener or salt-free conditioner?Utah water hardness, utility by utility

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageMarch 1, 2026 to March 31, 20260.011 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageFeb. 1, 2026 to Feb. 28, 20260.014 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJan. 1, 2026 to Jan. 31, 20260.018 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageDec. 1, 2025 to Dec. 31, 20250.021 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageNov. 1, 2025 to Nov. 30, 20250.026 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageOct. 1, 2025 to Oct. 31, 20250.038 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageSept. 1, 2025 to Sept. 30, 20250.042 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageAug. 1, 2025 to Aug. 31, 20250.046 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJuly 1, 2025 to July 31, 20250.048 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJune 1, 2025 to June 30, 20250.049 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageMarch 1, 2025 to March 31, 20250.046 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageFeb. 1, 2025 to Feb. 28, 20250.043 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJan. 1, 2025 to Jan. 31, 20250.035 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageDec. 1, 2024 to Dec. 31, 20240.036 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageNov. 1, 2024 to Nov. 30, 20240.031 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageOct. 1, 2024 to Oct. 31, 20240.019 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageSept. 1, 2024 to Sept. 30, 20240.015 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageAug. 1, 2024 to Aug. 31, 20240.011 MG/LResolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 86 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Arsenic, fluoride, nitrate and chromium (total) results here are Utah’s own from 2020 on, with EPA’s national file for 2012 to 2019. Oak Haven Water Company’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; Utah’s results run from March 27, 2020 to Sept. 28, 2026.

Testing your own tap

Oak Haven Water Company’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 3 labs Utah certifies closest to the area Oak Haven Water Company serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Wasatch County Health Department

    Heber City, UT · about 6 miles

    Certified for bacteria

    (435) 657-3303

  • Jordanelle Laboratory

    Heber City, UT · about 8 miles

    Certified for bacteria

    (435) 333-0475

  • Chemtech-Ford, Inc.

    Sandy, UT · about 20 miles

    Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity

    (801) 262-7299

All 60 certified labs for Utah

Sources

PWSID UTAH26043. Rebuilt from EPA data on Oct. 18, 2026.

Also in Wasatch County

All Utah utilities

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