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McI Bridgewater

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
2,802 people
Connections
41
Water source
Surface water bought from another system
Based in
Bridgewater, MA
County
Plymouth
Owner
State government
The ZIP code it serves

02324

The short answer

1 result is above EPA’s legal limit. The worst: Total trihalomethanes (TTHM), above the legal limit. 2 health-based violations since 2016.

What handles it

What was found

Total trihalomethanes (TTHM) and haloacetic acids (HAA5): Massachusetts’s own results, samples taken from Feb. 18, 2020 to Aug. 13, 2026, with EPA’s 2012 to 2019 file for earlier years.

Above the legal limit1

Total trihalomethanes (TTHM)

Forms or is added in treatment

Above the legal limit

77.9ppb

Highest yearly average, 2020 to 2026

2026 average: 50.2 ppb

Averaged by year, the highest was 77.9 ppb, in 2022, below EPA’s legal limit of 80 ppb. Its highest single sample was 200 ppb. In 2026, the latest year on file, its six samples averaged 50.2 ppb. EPA judges this limit at each sampling point, and recorded a violation for total trihalomethanes (TTHM) at this utility in 2022. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 52.4 ppb, in 2019.

What handles it

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

Below EPA’s limits1

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

48.3ppb

Highest yearly average, 2020 to 2026

2026 average: 27.9 ppb

Averaged by year, the highest was 48.3 ppb, in 2024, below EPA’s legal limit of 60 ppb. Its highest single sample was 78 ppb. In 2026, the latest year on file, its six samples averaged 27.9 ppb. EPA recorded no violation for haloacetic acids (HAA5) at this utility since 2020. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 34.3 ppb, in 2019.

What handles it

No certification claim covers this compound yet.

One compound tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Lead

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

Contaminant or ruleTypePeriodMeasuredStatus
TTHMThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageOct. 1, 2022 to Dec. 31, 2022—Archived
TTHMThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJuly 1, 2022 to Sept. 30, 2022—Archived
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 4 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Total trihalomethanes (TTHM) and haloacetic acids (HAA5) results here are Massachusetts’s own from 2020 on, with EPA’s national file for 2012 to 2019. McI Bridgewater’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 Feb. 18, 2020 to Aug. 13, 2026.

Testing your own tap

McI Bridgewater’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 McI Bridgewater 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 9 miles

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

    (508) 946-2225

  • Pace Analytical LLC-Mansfield-320 Forbes

    Mansfield, MA · about 13 miles

    Certified for lead and copper, metals, PFAS

    (508) 822-9300

  • Battelle Memorial Institute

    Norwell, MA · about 16 miles

    Certified for PFAS

    (781) 681-6635

All 81 certified labs for Massachusetts

Sources

PWSID MA4042001. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Plymouth County

All Massachusetts utilities

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