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Liberty Ridge MHP

What EPA’s and CDC’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
29
Water source
Groundwater
Based in
Henniker, NH
County
Merrimack
Owner
Private
The ZIP code it serves

03242

The short answer

2 results are above EPA’s legal limit, and 2 more are above the health goal. The worst: Lead, above the action level. 1 health-based violation since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 2003 to 2024.

Arsenic, uranium, total trihalomethanes (TTHM), nitrate and haloacetic acids (HAA5): New Hampshire’s yearly averages per water system, as CDC’s Environmental Public Health Tracking Network publishes them, 2020 to 2023, with EPA’s 2012 to 2019 file for earlier years.

Fluoride: EPA’s violation records from 2020 on, with EPA’s 2012 to 2019 file for earlier years.

Chromium (total): EPA’s compliance monitoring file, samples taken from July 19, 2016 to July 22, 2019. Newer results are in the utility’s annual water quality report.

Above the legal limit2

Lead

Comes from pipes, often your own

Above the action level

23ppb

90th percentile, 2022 to 2024

In the latest period, 9 in 10 homes sampled were at or below 23 ppb, above EPA’s action level of 15 ppb. The action level drops to 10 ppb on Nov. 1, 2027, and this result is at or above that. EPA’s health goal for lead is zero.

What handles it

Fluoride

Forms or is added in treatment

Above the legal limit

4.1ppm

Limit violation, 2022

EPA recorded a violation of the legal limit for fluoride at this utility in 2022. The highest measured level, for July 1, 2022 to Sept. 30, 2022, was an average of 4.1 ppm, above EPA’s legal limit of 4.0 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 1.7 ppm, in 2019.

What handles it

Above the health goal2

Arsenic

Comes from the source

Above the health goal

0.88ppb

Highest yearly average, 2020 to 2023

Averaged by year, the highest was 0.88 ppb, in 2023: below EPA’s legal limit of 10 ppb, but above its health goal of zero. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 2.0 ppb, in 2014.

What handles it

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

Uranium

Comes from the source

Above the health goal

1.1ppb

Highest yearly average, 2022

Averaged by year, the highest was 1.1 ppb, in 2022: below EPA’s legal limit of 30 ppb, but above its health goal of zero. That is the only year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 2.8 ppb, in 2019.

What handles it

Below EPA’s limits2

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

3.5ppb

Highest yearly average, 2020 to 2023

Averaged by year, the highest was 3.5 ppb, in 2023, below EPA’s legal limit of 80 ppb. That was also the latest year on file.

What handles it

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

Nitrate

Comes from the source

Below EPA’s limits

0.4ppm

Highest yearly average, 2020 to 2023

2023: not found

Averaged by year, the highest was 0.4 ppm, in 2022, below EPA’s legal limit of 10 ppm. In 2023, the latest year on file, it wasn’t found. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 1.2 ppm, in 2019.

What handles it

  • NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
  • NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”
2 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Chromium (total)
  • Haloacetic acids (HAA5)

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

    For: Lead, Fluoride, Arsenic

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

  • NSF/ANSI 58

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

    For: Lead, Fluoride, Arsenic, Uranium

    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 water filters for lead, ranked

The best water filters for fluoride, ranked

The best reverse osmosis systems, ranked

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
FluorideThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJuly 1, 2022 to Sept. 30, 20224.1 MG/LResolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 1 monitoring or reporting violation not shown.

What this report can’t tell you

  • Everything else. Arsenic, uranium, total trihalomethanes (TTHM), nitrate and haloacetic acids (HAA5) results here are New Hampshire’s yearly averages as CDC publishes them, from 2020 on, with EPA’s national file for 2012 to 2019. Chromium (total) comes from EPA’s file alone, which ends in 2019. Liberty Ridge 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; CDC’s yearly averages for New Hampshire cover 2020 to 2023; EPA’s compliance samples are from July 19, 2016 to July 22, 2019.

Testing your own tap

Liberty Ridge 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 New Hampshire certifies.

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

  • New Hampshire DHHS Public Health Laboratories

    Concord, NH · about 13 miles

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

    (603) 271-3445

  • Eurofins Concord

    Concord, NH · about 15 miles

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

    (603) 228-0525

  • Nelson Analytical LLC

    Manchester, NH · about 26 miles

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

    (603) 622-0200

All 63 certified labs for New Hampshire

Sources

PWSID NH1123020. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Merrimack County

All New Hampshire utilities

What to do next