Rosendale Water District
What EPA’s and New York’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
- 2,200 people
- Connections
- 580
- Water source
- Surface water
- Based in
- Rosendale (T), NY
- County
- Ulster
- Owner
- Local government
The short answer
Nothing in EPA’s and New York’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), nitrate and arsenic: New York’s yearly summaries per water system, 2020 to 2024, with EPA’s 2012 to 2019 file for earlier years.
Chromium (total), fluoride and uranium: EPA’s compliance monitoring file, samples taken from Nov. 29, 2012 to Nov. 7, 2019. Newer results are in the utility’s annual water quality report.
Below EPA’s limits3
Total trihalomethanes (TTHM)
Forms or is added in treatment
32.2ppb
Highest yearly average, 2020 to 2024
2024 average: 8.4 ppb
Averaged by year, the highest was 32.2 ppb, in 2022, below EPA’s legal limit of 80 ppb. Its highest single sample was 43 ppb. In 2024, the latest year on file, it averaged 8.4 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 37 ppb, in 2012.
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
15.7ppb
Highest yearly average, 2020 to 2024
2024 average: 4.2 ppb
Averaged by year, the highest was 15.7 ppb, in 2023, below EPA’s legal limit of 60 ppb. Its highest single sample was 27 ppb. In 2024, the latest year on file, it averaged 4.2 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 10.8 ppb, in 2015.
What handles it
No certification claim covers this compound yet.
Nitrate
Comes from the source
2.3ppm
Highest sample; found in 4 of 4
2023 average: 1.8 ppm
The highest sample, in 2021, was 2.3 ppm, below EPA’s legal limit of 10 ppm. In 2023, the latest year on file, it averaged 1.8 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 2.8 ppm, in 2017.
What handles it
- NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
- NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”
5 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
- Arsenic
- Chromium (total)
- Fluoride
- Lead
- Uranium
Violations since 2016
No health-based violations on file with EPA since 2016.
What this report can’t tell you
Everything else. Total trihalomethanes (TTHM), haloacetic acids (HAA5), nitrate and arsenic results here are New York’s own yearly summaries from 2020 on, with EPA’s national file for 2012 to 2019. Chromium (total), fluoride and uranium come from EPA’s file alone, which ends in 2019. Rosendale Water District’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; New York’s yearly summaries cover 2020 to 2024; EPA’s compliance samples are from Nov. 29, 2012 to Nov. 7, 2019.
Testing your own tap
The 3 labs New York certifies closest to the area Rosendale Water District serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Aqua Check Laboratories, Inc.
Stone Ridge, NY · about 8 miles
Certified for bacteria
Poughkeepsies' Water Treatment Facility
Poughkeepsie, NY · about 16 miles
Certified for bacteria
Environmental Labworks Inc.
Marlboro, NY · about 21 miles
Certified for bacteria
Sources
- EPA UCMR 5 occurrence data, file of Oct. 15, 2026
- EPA SDWA bulk download (SDWIS federal data), 2026 Q3
- New York State Department of Health, Environmental Public Health Tracker, results from Jan. 1, 2020 to Dec. 31, 2024, read Oct. 8, 2026
- EPA Six-Year Review 4 compliance monitoring data, 2012 to 2019, file of Feb. 5, 2024
- Certified labs: NYS Environmental Laboratory Approval Program (ELAP), drinking water labs, as listed in TNI LAMS, 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 NY5503383. Rebuilt from EPA data on Oct. 18, 2026.
What to do next
- Nothing here is above a health goalIn EPA’s and New York’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 reportRosendale Water District 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