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Hopewell Boro W Dept

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
2,035 people
Connections
880
Water source
Surface water bought from another system
Based in
Hopewell Boro, NJ
County
Mercer
Owner
Local government
The ZIP code it serves

08525

The short answer

1 result is above the health goal. The worst: Arsenic, above the health goal. 2 health-based violations since 2016.

What handles it

What was found

Arsenic, total trihalomethanes (TTHM), haloacetic acids (HAA5) and nitrate: 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.

Chromium (total) and fluoride: EPA’s compliance monitoring file, samples taken from Nov. 14, 2012 to June 18, 2018. Newer results are in the utility’s annual water quality report.

Above the health goal1

Arsenic

Comes from the source

Above the health goal

3.2ppb

Highest yearly average, 2021

Averaged by year, the highest was 3.2 ppb, in 2021: below EPA’s legal limit of 10 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 4.8 ppb, 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”

Below EPA’s limits4

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

53.7ppb

Highest yearly average, 2020 to 2023

Averaged by year, the highest was 53.7 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 48.3 ppb, in 2018.

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

38.9ppb

Highest yearly average, 2020 to 2023

2023 average: 29.6 ppb

Averaged by year, the highest was 38.9 ppb, in 2021, below EPA’s legal limit of 60 ppb. In 2023, the latest year on file, it averaged 29.6 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 24.4 ppb, in 2017.

What handles it

No certification claim covers this compound yet.

Nitrate

Comes from the source

Below EPA’s limits

2.9ppm

Highest yearly average, 2020 to 2021

2021 average: 2.8 ppm

Averaged by year, the highest was 2.9 ppm, in 2020, below EPA’s legal limit of 10 ppm. In 2021, the latest year on file, it averaged 2.8 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 2.8 ppm, in 2013.

What handles it

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

Chromium (total)

Comes from the source

Below EPA’s limits

4.3ppb

Highest yearly average, 2012 to 2018

2018, one sample: 1.2 ppb

Averaged by year, the highest was 4.3 ppb, in 2015, below EPA’s legal limit of 100 ppb. In 2018, the latest year on file, its one sample was 1.2 ppb.

What handles it

2 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Fluoride
  • 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: Arsenic (Pentavalent)<=50 ppb Reduction

    For: Arsenic

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

  • NSF/ANSI 58

    Claim: Arsenic (Pentavalent)<=50 ppb Reduction

    For: Arsenic

    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

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The best reverse osmosis systems, ranked

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
Lead and Copper RuleWater chemistry used to keep pipes from corroding was outside the required range.EPA: WQP Entry Point/Tap Treatment Technique Non-ComplianceJuly 1, 2024 to Dec. 31, 2024—Resolved
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, 2024 to June 30, 2024—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. Arsenic, total trihalomethanes (TTHM), haloacetic acids (HAA5) and nitrate results here are New Jersey’s yearly averages as CDC publishes them, from 2020 on, with EPA’s national file for 2012 to 2019. Chromium (total) and fluoride come from EPA’s file alone, which ends in 2019. Hopewell Boro W Dept’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 Nov. 14, 2012 to June 18, 2018.

Testing your own tap

Hopewell Boro W Dept’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 Hopewell Boro W Dept serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Environmental Compliance Monitoring Inc.

    Hillsborough, NJ · about 9 miles

    (908) 874-0990

  • Pace Analytical Services, LLC - Ewing

    Ewing, NJ · about 10 miles

    (609) 737-3477

  • New Jersey Department of Health

    West Trenton, NJ · about 10 miles

    (609) 718-8169

All 89 certified labs for New Jersey

Sources

PWSID NJ1105001. Rebuilt from EPA data on Oct. 18, 2026.

Also in Mercer County

All New Jersey utilities

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