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Hardyston Twp Mua

What EPA’s and CDC’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
769 people
Connections
289
Water source
Groundwater
Based in
Hardyston Twp., NJ
County
Sussex
Owner
Local government
The ZIP code it serves

07419

The short answer

1 result is above EPA’s legal limit, and 1 more is above the health goal. The worst: Copper, above the action level. 4 health-based violations since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 2004 to 2025.

Total trihalomethanes (TTHM), haloacetic acids (HAA5) and arsenic: New Jersey’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.

Nitrate, chromium (total) and fluoride: EPA’s compliance monitoring file, samples taken from April 3, 2012 to May 21, 2019. Newer results are in the utility’s annual water quality report.

Above the legal limit1

Copper

Comes from pipes, often your own

Above the action level

1.4ppm

90th percentile, 2025

In the latest period, 9 in 10 homes sampled were at or below 1.4 ppm, above EPA’s action level of 1.3 ppm.

What handles it

Above the health goal1

Lead

Comes from pipes, often your own

Above the health goal

1.1ppb

90th percentile, 2026

In the latest period, 9 in 10 homes sampled were at or below 1.1 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 limits5

Nitrate

Comes from the source

Below EPA’s limits

4.0ppm

Highest sample; found in 8 of 8

2019, one sample: 2.5 ppm

The highest sample, in 2015, was 4.0 ppm, below EPA’s legal limit of 10 ppm. In 2019, the latest year on file, its one sample was 2.5 ppm.

What handles it

  • NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
  • NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

21.5ppb

Highest yearly average, 2020 to 2023

Averaged by year, the highest was 21.5 ppb, in 2023, below EPA’s legal limit of 80 ppb. That was also the latest year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 25.5 ppb, in 2017.

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

10.1ppb

Highest yearly average, 2020 to 2023

2023 average: 2.1 ppb

Averaged by year, the highest was 10.1 ppb, in 2020, below EPA’s legal limit of 60 ppb. In 2023, the latest year on file, it averaged 2.1 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 3.6 ppb, in 2015.

What handles it

No certification claim covers this compound yet.

Chromium (total)

Comes from the source

Below EPA’s limits

4.1ppb

Highest yearly average, 2012 to 2018

2018: not found

Averaged by year, the highest was 4.1 ppb, in 2012, below EPA’s legal limit of 100 ppb. In 2018, the latest year on file, it wasn’t found in its one sample.

What handles it

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.024ppm

Highest yearly average, 2012 to 2018

2018: not found

Averaged by year, the highest was 0.024 ppm, in 2015, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 0.049 ppm. In 2018, the latest year on file, it wasn’t found in any of its two samples.

What handles it

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

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: Copper Reduction, Lead Reduction

    For: Copper, Lead

  • NSF/ANSI 58

    Claims: Copper Reduction, Lead Reduction

    For: Copper, 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
Lead and Copper RuleA required study or plan for corrosion control was not done on time.EPA: OCCT/SOWT Study/RecommendationJan. 1, 2026—Unaddressed
Lead and Copper RuleWater chemistry used to keep pipes from corroding was outside the required range.EPA: WQP Entry Point/Tap Treatment Technique Non-ComplianceJan. 1, 2025 to June 30, 2025—Resolved
Groundwater RuleFailure To Address ContaminationJuly 23, 2021—Unaddressed
Lead and Copper RuleA required study or plan for corrosion control was not done on time.EPA: OCCT/SOWT Study/RecommendationApril 1, 2020—Resolved
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 17 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Total trihalomethanes (TTHM), haloacetic acids (HAA5) and arsenic results here are New Jersey’s yearly averages as CDC publishes them, from 2020 on, with EPA’s national file for 2012 to 2019. Nitrate, chromium (total) and fluoride come from EPA’s file alone, which ends in 2019. Hardyston Twp Mua’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 Jersey cover 2020 to 2023; EPA’s compliance samples are from April 3, 2012 to May 21, 2019.

Testing your own tap

Hardyston Twp Mua’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 Jersey certifies.

The 3 labs New Jersey certifies closest to the area Hardyston Twp Mua serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Well Qualified LLC

    Lafayette, NJ · about 7 miles

    (973) 362-1306

  • Advanced Water Technology LLC

    Sparta, NJ · about 8 miles

    (800) 440-8265

  • Environmental Laboratory Services, LLC

    Ringwood, NJ · about 16 miles

    (973) 728-8044

All 89 certified labs for New Jersey

Sources

PWSID NJ1911005. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Sussex County

All New Jersey utilities

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