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North Carver Water System

What EPA’s and Massachusetts’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
300 people
Connections
138
Water source
Groundwater
Based in
Carver, MA
County
Plymouth
Owner
Local government
Hardness
Soft
The ZIP code it serves

02330

The short answer

1 result is above the health goal. The worst: Lead, above the health goal. 1 health-based violation since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 2015 to 2025.

Total trihalomethanes (TTHM), haloacetic acids (HAA5), arsenic, chromium (total), fluoride and nitrate: Massachusetts’s own results, samples taken from May 12, 2020 to Aug. 6, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the health goal1

Lead

Comes from pipes, often your own

Above the health goal

2.0ppb

90th percentile, 2025

In the latest period, 9 in 10 homes sampled were at or below 2.0 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

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

31.2ppb

Highest yearly average, 2022 to 2026

2026 average: 29.7 ppb

Averaged by year, the highest was 31.2 ppb, in 2025, below EPA’s legal limit of 80 ppb. Its highest single sample was 42.6 ppb. In 2026, the latest year on file, its three samples averaged 29.7 ppb.

What handles it

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

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

8.4ppb

Highest yearly average, 2022 to 2026

2026 average: 7.9 ppb

Averaged by year, the highest was 8.4 ppb, in 2025, below EPA’s legal limit of 60 ppb. Its highest single sample was 13.3 ppb. In 2026, the latest year on file, its three samples averaged 7.9 ppb.

What handles it

No certification claim covers this compound yet.

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

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

Hardness

Soft, 26 mg/L (1.5 grains per gallon), at its one sampling point, 2015 to 2023.

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 1.5 grains per gallon, salt includedSoftener or salt-free conditioner?Massachusetts water hardness, utility by utility

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
Lead and Copper Rule RevisionsThe required inventory of lead service lines was not completed or submitted on time.EPA: LSL InventoryOct. 17, 2024—Unaddressed
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 8 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Total trihalomethanes (TTHM), haloacetic acids (HAA5), arsenic, chromium (total), fluoride and nitrate results here are Massachusetts’s own from 2020 on, with EPA’s national file for 2012 to 2019. North Carver Water System’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; Massachusetts’s results run from May 12, 2020 to Aug. 6, 2026.

Testing your own tap

North Carver Water System’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 Massachusetts certifies.

The 3 labs Massachusetts certifies closest to the area North Carver Water System serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Eurofins Providence (AB)

    Middleborough, MA · about 6 miles

    Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics

    (508) 946-2225

  • Envirotech Laboratories Inc.

    Sandwich, MA · about 17 miles

    Certified for bacteria, nitrate, minerals and other inorganics

    (508) 888-6460

  • Battelle Memorial Institute

    Norwell, MA · about 20 miles

    Certified for PFAS

    (781) 681-6635

All 81 certified labs for Massachusetts

Sources

PWSID MA4052072. Rebuilt from EPA data on Oct. 18, 2026.

Also in Plymouth County

All Massachusetts utilities

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