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Mansion Ridge Water Company

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
276 people
Connections
66
Water source
Groundwater
Based in
Monroe (T), NY
County
Orange
Owner
Private
The ZIP code it serves

10950

The short answer

2 results are above the health goal. The worst: Uranium, above the health goal. No health-based violations on file since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 2007 to 2024.

Uranium, 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) and fluoride: EPA’s compliance monitoring file, samples taken from Aug. 28, 2014 to May 23, 2017. Newer results are in the utility’s annual water quality report.

Above the health goal2

Uranium

Comes from the source

Above the health goal

19.7ppb

Highest yearly average, 2023

Averaged by year, the highest was 19.7 ppb, in 2023: below EPA’s legal limit of 30 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 17.6 ppb, in 2016.

What handles it

Lead

Comes from pipes, often your own

Above the health goal

7.3ppb

90th percentile, 2022 to 2024

In the latest period, 9 in 10 homes sampled were at or below 7.3 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

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

36.3ppb

Highest yearly average, 2022

Averaged by year, the highest was 36.3 ppb, in 2022, below EPA’s legal limit of 80 ppb. That is the only year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 36.9 ppb, in 2013.

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

18.6ppb

Highest yearly average, 2022

Averaged by year, the highest was 18.6 ppb, in 2022, below EPA’s legal limit of 60 ppb. That is the only year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 19.3 ppb, in 2013.

What handles it

No certification claim covers this compound yet.

Nitrate

Comes from the source

Below EPA’s limits

3.1ppm

Highest sample; found in 6 of 6

2024 average: 0.36 ppm

The highest sample, in 2022, was 3.1 ppm, below EPA’s legal limit of 10 ppm. In 2024, the latest year on file, it averaged 0.36 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 0.38 ppm, in 2017.

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

12ppb

Highest yearly average, 2014 to 2017

2017: not found

Averaged by year, the highest was 12 ppb, in 2014, below EPA’s legal limit of 100 ppb. In 2017, 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

0.2ppm

Highest yearly average, 2014 to 2017

2017: not found

Averaged by year, the highest was 0.2 ppm, in 2014, below EPA’s legal limit of 4.0 ppm. In 2017, the latest year on file, it wasn’t found in its one sample.

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.”

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

No health-based violations on file with EPA since 2016. There is 1 monitoring or reporting violation: a sample missed, late or not reported.

What this report can’t tell you

  • Everything else. Uranium, 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) and fluoride come from EPA’s file alone, which ends in 2019. Mansion Ridge Water Company’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 Aug. 28, 2014 to May 23, 2017.

Testing your own tap

Mansion Ridge Water Company’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 York certifies.

The 3 labs New York certifies closest to the area Mansion Ridge Water Company serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Pace Analytical Services, LLC-Newburgh

    Newburgh, NY · about 17 miles

    Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics

    (845) 562-0890

  • Advanced Analytical Technologies

    Pearl River, NY · about 20 miles

    Certified for bacteria

    (201) 484-7461

  • Yorktown Medical Laboratory Inc.

    Yorktown Heights, NY · about 21 miles

    Certified for bacteria, nitrate, lead and copper

    (914) 245-3203

All 161 certified labs for New York

Sources

PWSID NY3530065. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Orange County

All New York utilities

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