Pocantico Hills 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
- 329 people
- Connections
- 94
- Water source
- Surface water
- Based in
- Mount Pleasant (T), NY
- County
- Westchester
- Owner
- Local government
The ZIP code it serves
The short answer
1 result is above EPA’s legal limit. The worst: Haloacetic acids (HAA5), above the legal limit. 9 health-based violations since 2016.
What was found
Haloacetic acids (HAA5), total trihalomethanes (TTHM), nitrate and arsenic: New York’s yearly summaries per water system, 2020 to 2024, with EPA’s 2012 to 2019 file for earlier years.
Fluoride, chromium (total) and uranium: EPA’s compliance monitoring file, samples taken from Sept. 27, 2012 to Nov. 4, 2019. Newer results are in the utility’s annual water quality report.
Above the legal limit1
Haloacetic acids (HAA5)
Forms or is added in treatment
60.6ppb
Highest yearly average, 2020 to 2024
2024 average: 40.5 ppb
Averaged by year, the highest was 60.6 ppb, in 2021, above EPA’s legal limit of 60 ppb. Its highest single sample was 106 ppb. In 2024, the latest year on file, it averaged 40.5 ppb. EPA recorded a violation for haloacetic acids (HAA5) at this utility in 2021. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 75.5 ppb, in 2018, and EPA recorded violations in 2018 and 2019.
What handles it
No certification claim covers this compound yet.
Below EPA’s limits3
Total trihalomethanes (TTHM)
Forms or is added in treatment
49.7ppb
Highest yearly average, 2020 to 2024
2024 average: 36.1 ppb
Averaged by year, the highest was 49.7 ppb, in 2020, below EPA’s legal limit of 80 ppb. Its highest single sample was 81 ppb. In 2024, the latest year on file, it averaged 36.1 ppb. EPA recorded no violation for total trihalomethanes (TTHM) at this utility since 2020. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 65.6 ppb, in 2015.
What handles it
- NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
- NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”
Fluoride
Forms or is added in treatment
0.12ppm
Highest yearly average, 2012 to 2019
2019: not found
Averaged by year, the highest was 0.12 ppm, in 2015, below EPA’s legal limit of 4.0 ppm. In 2019, the latest year on file, it wasn’t found in its one sample.
What handles it
- NSF/ANSI 58 look for “Fluoride Reduction”
- NSF/ANSI 53 look for “Fluoride”
Nitrate
Comes from the source
0.13ppm
Highest sample; found in 1 of 5
2024: not found
The highest sample, in 2020, was 0.13 ppm, below EPA’s legal limit of 10 ppm. In 2024, the latest year on file, it wasn’t found. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 0.17 ppm, in 2018.
What handles it
- NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
- NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”
4 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
- Arsenic
- Chromium (total)
- Lead
- Uranium
Violations since 2016
| Contaminant or rule | Type | Period | Measured | Status |
|---|---|---|---|---|
| Total Haloacetic Acids (HAA5) | The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average | Oct. 1, 2021 to Dec. 31, 2021 | 0.062 MG/L | Resolved |
| Total Haloacetic Acids (HAA5) | The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average | July 1, 2021 to Sept. 30, 2021 | 0.071 MG/L | Resolved |
| Total Haloacetic Acids (HAA5) | The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average | April 1, 2021 to June 30, 2021 | 0.071 MG/L | Resolved |
| Total Haloacetic Acids (HAA5) | The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average | Jan. 1, 2021 to March 31, 2021 | 0.071 MG/L | Resolved |
| Total Haloacetic Acids (HAA5) | The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average | July 1, 2019 to Sept. 30, 2019 | 0.067 MG/L | Resolved |
| Total Haloacetic Acids (HAA5) | The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average | April 1, 2019 to June 30, 2019 | 82.5 UG/L | Resolved |
| Total Haloacetic Acids (HAA5) | The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average | Jan. 1, 2019 to March 31, 2019 | 70.6 UG/L | Resolved |
| Total Haloacetic Acids (HAA5) | The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average | Oct. 1, 2018 to Dec. 31, 2018 | 83.3 UG/L | Resolved |
| Total Haloacetic Acids (HAA5) | The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, Average | July 1, 2018 to Sept. 30, 2018 | 60.8 UG/L | Resolved |
| Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. | ||||
What this report can’t tell you
Everything else. Haloacetic acids (HAA5), total trihalomethanes (TTHM), nitrate and arsenic results here are New York’s own yearly summaries from 2020 on, with EPA’s national file for 2012 to 2019. Fluoride, chromium (total) and uranium come from EPA’s file alone, which ends in 2019. Pocantico Hills 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 Sept. 27, 2012 to Nov. 4, 2019.
Testing your own tap
The 3 labs New York certifies closest to the area Pocantico Hills Water District serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Yorktown Medical Laboratory Inc.
Yorktown Heights, NY · about 7 miles
Certified for bacteria, nitrate, lead and copper
Westchester Co Labs and Research
Valhalla, NY · about 8 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS
EAS Inc. - Eastern Analytical Services Inc.
Elmsford, NY · about 11 miles
Certified for lead and copper, asbestos
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 NY5903472. Rebuilt from EPA data on Oct. 18, 2026.
What to do next
- Read up on Haloacetic acids (HAA5)What each one does to health, where it comes from, and the certification claim that addresses it.About Haloacetic acids (HAA5)
- Get the utility’s own reportPocantico Hills 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