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
- 1,963 people
- Connections
- 738
- Water source
- Groundwater
- Based in
- Hardyston Twp., NJ
- County
- Sussex
- Owner
- Local government
The ZIP code it serves
The short answer
Nothing in EPA’s and CDC’s records for this utility is above a health goal. That covers nitrate, arsenic and other regulated chemicals, plus lead and copper, not everything. No health-based violations on file since 2016.
What was found
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, fluoride and chromium (total): EPA’s compliance monitoring file, samples taken from Feb. 14, 2012 to June 25, 2019. Newer results are in the utility’s annual water quality report.
Below EPA’s limits5
Nitrate
Comes from the source
2.1ppm
Highest sample; found in 16 of 16
2019 average: 1.7 ppm
The highest sample, in 2012, was 2.1 ppm, below EPA’s legal limit of 10 ppm. In 2019, the latest year on file, its two samples averaged 1.7 ppm.
What handles it
- NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
- NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”
Fluoride
Forms or is added in treatment
0.28ppm
Highest yearly average, 2012 to 2018
Averaged by year, the highest was 0.28 ppm, in 2018, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 0.68 ppm. That was also the latest year on file.
What handles it
- NSF/ANSI 58 look for “Fluoride Reduction”
- NSF/ANSI 53 look for “Fluoride”
Total trihalomethanes (TTHM)
Forms or is added in treatment
5.0ppb
Highest yearly average, 2020 to 2023
2023 average: 4.3 ppb
Averaged by year, the highest was 5.0 ppb, in 2022, below EPA’s legal limit of 80 ppb. In 2023, the latest year on file, it averaged 4.3 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 5.4 ppb, in 2019.
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
2.2ppb
Highest yearly average, 2020 to 2023
2023: not found
Averaged by year, the highest was 2.2 ppb, in 2022, below EPA’s legal limit of 60 ppb. In 2023, the latest year on file, it wasn’t found. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.64 ppb, in 2015.
What handles it
No certification claim covers this compound yet.
Chromium (total)
Comes from the source
1.9ppb
Highest yearly average, 2012 to 2018
2018: not found
Averaged by year, the highest was 1.9 ppb, in 2012, below EPA’s legal limit of 100 ppb. Its highest single sample was 2.4 ppb. In 2018, the latest year on file, it wasn’t found in any of its two samples.
What handles it
- NSF/ANSI 58 look for “Chromium (Hexavalent) Reduction”
- NSF/ANSI 53 look for “Chromium Reduction”
2 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
- Arsenic
- Lead
Violations since 2016
No health-based violations on file with EPA since 2016. There are 9 monitoring or reporting violations: a sample missed, late or not reported.
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, fluoride and chromium (total) 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 Feb. 14, 2012 to June 25, 2019.
Testing your own tap
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
Advanced Water Technology LLC
Sparta, NJ · about 8 miles
Environmental Laboratory Services, LLC
Ringwood, NJ · about 16 miles
Sources
- EPA UCMR 5 occurrence data, file of Oct. 15, 2026
- EPA SDWA bulk download (SDWIS federal data), 2026 Q3
- CDC Environmental Public Health Tracking Network, yearly averages New Jersey supplied to CDC, 2020 to 2023, read Oct. 8, 2026. TapBuff’s comparisons with EPA’s limits are its own, not CDC’s or New Jersey’s.
- EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, file of Feb. 5, 2024
- Certified labs: NJDEP Office of Quality Assurance, certified drinking water labs, read Oct. 11, 2026; distances from the Census 2020 ZIP code tabulation area gazetteer
- Limits and goals: each contaminant’s page, with its EPA source.
- How this page is built: methodology.
PWSID NJ1911006. Rebuilt from EPA data on Oct. 18, 2026.
What to do next
- Nothing here is above a health goalIn EPA’s and CDC’s records for this utility. They don’t cover everything, which is why the next step matters.Every contaminant TapBuff tracks
- Get the utility’s own reportHardyston Twp Mua must send you a water quality report every year. It covers contaminants this page does not show, and has newer results than EPA’s national file for the ones here that come from it.How to read it
- Test your own tap for leadYour service line, solder and fixtures decide the lead at your faucet, not the utility’s average.Lead in your water: what to do
- Decide if you want a filter at allA filter for taste or chlorine is a preference, not a need. The standards say what each kind can do.NSF/ANSI standards, decoded