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South Weare Water

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
200 people
Connections
63
Water source
Groundwater
Based in
Weare, NH
County
Hillsborough
Owner
Private
The ZIP code it serves

03281

The short answer

2 results are above EPA’s legal limit, and 1 more is above the health goal. The worst: Arsenic, above the legal limit. 6 health-based violations since 2016.

What handles it

What was found

Arsenic, uranium, nitrate and total trihalomethanes (TTHM): 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 and chromium (total): EPA’s compliance monitoring file, samples taken from Feb. 27, 2014 to Oct. 10, 2019. Newer results are in the utility’s annual water quality report.

Above the legal limit2

Arsenic

Comes from the source

Above the legal limit

22.4ppb

Highest yearly average, 2020 to 2023

Averaged by year, the highest was 22.4 ppb, in 2023, about twice EPA’s legal limit of 10 ppb. That was also the latest year on file. 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 8.6 ppb, in 2014, and EPA recorded a violation 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”

Fluoride

Forms or is added in treatment

Above the legal limit

2.4ppm

Highest yearly average, 2014 to 2019

Averaged by year, the highest was 2.4 ppm, in 2019, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 4.4 ppm. That was also the latest year on file. EPA judges this limit at each sampling point, and recorded a violation for fluoride at this utility in 2013.

What handles it

Above the health goal1

Uranium

Comes from the source

Above the health goal

0.75ppb

Highest yearly average, 2023

Averaged by year, the highest was 0.75 ppb, in 2023: 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 0.25 ppb, in 2015.

What handles it

Below EPA’s limits2

Chromium (total)

Comes from the source

Below EPA’s limits

10ppb

Highest yearly average, 2014 to 2019

2019, one sample: 1.2 ppb

Averaged by year, the highest was 10 ppb, in 2015, below EPA’s legal limit of 100 ppb. In 2019, the latest year on file, its one sample was 1.2 ppb.

What handles it

Nitrate

Comes from the source

Below EPA’s limits

0.36ppm

Highest yearly average, 2020 to 2023

Averaged by year, the highest was 0.36 ppm, in 2023, below EPA’s legal limit of 10 ppm. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 0.46 ppm, in 2017.

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.
  • Total trihalomethanes (TTHM)

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, Fluoride

    For: Arsenic, Fluoride

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

  • NSF/ANSI 58

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

    For: Arsenic, Fluoride, Uranium

    Other certifiers’ wording: Arsenic (Pentavalent)<=300 ppb Reduction; Arsenic (V) (300 ppb influent level)

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 reverse osmosis systems, ranked

The best water filters for fluoride, ranked

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageOct. 1, 2023 to Dec. 31, 20230.026 MG/LResolved
Revised Total Coliform RuleE. coli was confirmed in the water system.EPA: Maximum Contaminant Level Violation, E. coli (RTCR)July 1, 2023 to Aug. 1, 2023—Resolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJuly 1, 2023 to Sept. 30, 20230.022 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageApril 1, 2023 to June 30, 20230.015 MG/LResolved
ArsenicThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJan. 1, 2023 to March 31, 20230.011 MG/LResolved
Revised Total Coliform RuleColiform results required a check of the system, and the check or its fixes were not done on time.EPA: Treatment Technique, Level 1 Assessment (RTCR)July 1, 2017—Resolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 5 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Arsenic, uranium, nitrate and total trihalomethanes (TTHM) results here are New Hampshire’s yearly averages as CDC publishes them, from 2020 on, with EPA’s national file for 2012 to 2019. Fluoride and chromium (total) come from EPA’s file alone, which ends in 2019. South Weare Water’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 Feb. 27, 2014 to Oct. 10, 2019.

Testing your own tap

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

  • Eurofins Concord

    Concord, NH · about 13 miles

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

    (603) 228-0525

  • New Hampshire DHHS Public Health Laboratories

    Concord, NH · about 14 miles

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

    (603) 271-3445

  • Nelson Analytical LLC

    Manchester, NH · about 17 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 NH2452030. Rebuilt from EPA data on Oct. 18, 2026.

Also in Hillsborough County

All New Hampshire utilities

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