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Linden Ponds

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
384 people
Connections
2
Water source
Surface water bought from another system
Based in
Hingham, MA
County
Plymouth
Owner
Private
The ZIP code it serves

02043

The short answer

1 result is above EPA’s legal limit, and 1 more is above the health goal. The worst: Total trihalomethanes (TTHM), above the legal limit. 3 health-based violations since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 2021 to 2025.

Total trihalomethanes (TTHM) and haloacetic acids (HAA5): Massachusetts’s own results, samples taken from Dec. 13, 2022 to Aug. 11, 2026.

Above the legal limit1

Total trihalomethanes (TTHM)

Forms or is added in treatment

Above the legal limit

77.8ppb

Highest yearly average, 2022 to 2026

2026 average: 67.2 ppb

Averaged by year, the highest was 77.8 ppb, in 2025, below EPA’s legal limit of 80 ppb. Its highest single sample was 118 ppb. In 2026, the latest year on file, its six samples averaged 67.2 ppb. EPA judges this limit at each sampling point, and recorded violations for total trihalomethanes (TTHM) at this utility in 2024 and 2026.

What handles it

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

Above the health goal1

Lead

Comes from pipes, often your own

Above the health goal

1.4ppb

90th percentile, 2025

In the latest period, 9 in 10 homes sampled were at or below 1.4 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 limits1

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

47.8ppb

Highest yearly average, 2022 to 2026

2026 average: 34.8 ppb

Averaged by year, the highest was 47.8 ppb, in 2025, below EPA’s legal limit of 60 ppb. Its highest single sample was 63.8 ppb. In 2026, the latest year on file, its six samples averaged 34.8 ppb. EPA recorded no violation for haloacetic acids (HAA5) at this utility since 2020.

What handles it

No certification claim covers this compound yet.

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: Trihalomethanes (TTHM) Reduction, Lead Reduction

    For: Total trihalomethanes (TTHM), Lead

    Other certifiers’ wording: VOC Reduction

  • NSF/ANSI 58

    Claims: Trihalomethanes (TTHM) Reduction, Lead Reduction

    For: Total trihalomethanes (TTHM), 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

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
TTHMThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageApril 1, 2026 to June 30, 2026—Archived
TTHMThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJan. 1, 2026 to March 31, 2026—Archived
TTHMThe running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJan. 1, 2024 to March 31, 2024—Archived
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 3 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 2022 on, with EPA’s national file for 2012 to 2019. Linden Ponds’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 Dec. 13, 2022 to Aug. 11, 2026.

Testing your own tap

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

  • Battelle Memorial Institute

    Norwell, MA · about 5 miles

    Certified for PFAS

    (781) 681-6635

  • G and L Labs Inc.

    Quincy, MA · about 8 miles

    Certified for bacteria

    (617) 328-3663

  • Matrix Sciences International Inc.

    Canton, MA · about 13 miles

    Certified for bacteria

    (781) 401-9999

All 81 certified labs for Massachusetts

Sources

PWSID MA4131005. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Plymouth County

All Massachusetts utilities

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