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Star Ridge

What EPA’s and CDC’s records show in this utility’s water: nitrate, arsenic and other regulated chemicals, plus violations since 2016, with the certification that handles each result.

Serves
96 people
Connections
48
Water source
Groundwater
Based in
Thornton, NH
County
Grafton
Owner
Private
The ZIP code it serves

03285

The short answer

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

What handles it

What was found

Uranium, arsenic and nitrate: 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 April 14, 2016 to May 14, 2019. Newer results are in the utility’s annual water quality report.

Above the legal limit1

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 April 1, 2022 to June 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 3.1 ppm, in 2019.

What handles it

Above the health goal1

Uranium

Comes from the source

Above the health goal

1.0ppb

Highest yearly average, 2020 to 2023

2023 average: 1.0 ppb

Averaged by year, the highest was 1.0 ppb, in 2020: below EPA’s legal limit of 30 ppb, but above its health goal of zero. In 2023, the latest year on file, it averaged 1.0 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 2.0 ppb, in 2017.

What handles it

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

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

The best water filters for fluoride, ranked

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
FluorideThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageApril 1, 2022 to June 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. Uranium, arsenic and nitrate 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. Star Ridge’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 April 14, 2016 to May 14, 2019.

Testing your own tap

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

  • Laconia Water Works Laboratory

    Lakeport, NH · about 27 miles

    Certified for bacteria

    (603) 524-1096

  • Gorham Wastewater Treatment Facility Laboratory

    Gorham, NH · about 34 miles

    Certified for bacteria

    (603) 466-3104

  • Endyne Inc.

    Lebanon, NH · about 37 miles

    Certified for bacteria, nitrate

    (603) 678-4891

All 63 certified labs for New Hampshire

Sources

PWSID NH2342080. Rebuilt from EPA data on Oct. 18, 2026.

Also in Grafton County

All New Hampshire utilities

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