Skip to content
TapBuff
ZIP

Arrowhead Lake MHP

What EPA’s and Ohio’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
327 people
Connections
247
Water source
Groundwater
Based in
West Covina, OH
County
Lucas
Owner
Private
The ZIP code it serves

43558

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. No health-based violations on file since 2016.

What handles it

What was found

Total trihalomethanes (TTHM), fluoride, haloacetic acids (HAA5), arsenic, chromium (total) and nitrate: Ohio’s own results, samples taken from June 12, 2020 to Nov. 13, 2025, with EPA’s 2012 to 2019 file for earlier years.

Uranium: EPA’s compliance monitoring file, samples taken from Dec. 9, 2013 to Oct. 21, 2018. 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

97.4ppb

Highest yearly average, 2020 to 2025

2025 average: 54.7 ppb

Averaged by year, the highest was 97.4 ppb, in 2023, above EPA’s legal limit of 80 ppb. Its highest single sample was 112 ppb. In 2025, the latest year on file, its four samples averaged 54.7 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 51.1 ppb, in 2017.

What handles it

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

Below EPA’s limits2

Fluoride

Forms or is added in treatment

Below EPA’s limits

1.8ppm

Highest yearly average, 2021 to 2024

2024, one sample: 1.8 ppm

Averaged by year, the highest was 1.8 ppm, in 2021, below EPA’s legal limit of 4.0 ppm. In 2024, the latest year on file, its one sample was 1.8 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 1.9 ppm, in 2012.

What handles it

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

22.5ppb

Highest yearly average, 2020 to 2025

2025 average: 7.3 ppb

Averaged by year, the highest was 22.5 ppb, in 2021, below EPA’s legal limit of 60 ppb. In 2025, the latest year on file, its four samples averaged 7.3 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 25.3 ppb, in 2016.

What handles it

No certification claim covers this compound yet.

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

No health-based violations on file with EPA since 2016. There are 6 monitoring or reporting violations: a sample missed, late or not reported.

What this report can’t tell you

  • Everything else. Total trihalomethanes (TTHM), fluoride, haloacetic acids (HAA5), arsenic, chromium (total) and nitrate results here are Ohio’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. Arrowhead Lake MHP’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; Ohio’s results run from June 12, 2020 to Nov. 13, 2025; EPA’s compliance samples are from Dec. 9, 2013 to Oct. 21, 2018.

Testing your own tap

Arrowhead Lake MHP’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 Ohio certifies.

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

  • Kleinfelder Water Technologies Laboratory

    McClure, OH · about 17 miles

    Certified for bacteria

    (419) 748-7438

  • Jones & Henry Laboratories

    Northwood, OH · about 21 miles

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

    (419) 666-0411

  • BoJhun Environmental Services

    Fostoria, OH · about 39 miles

    Certified for bacteria

    (419) 436-7066

All 76 certified labs for Ohio

Sources

PWSID OH4800112. Rebuilt from EPA data on Oct. 18, 2026.

Also in Lucas County

All Ohio utilities

What to do next