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Canonchet Cliffs Water Association Inc.

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
154 people
Connections
10
Water source
Groundwater
Based in
Hopkinton, RI
County
Washington
Owner
Local government
The ZIP code it serves

02832

The short answer

1 result is above the health goal. The worst: Lead, above the health goal. 9 health-based violations since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 2002 to 2024.

Copper: EPA’s file records a utility’s copper only when it exceeds the action level. The last here was 2.7 ppm, for the period ending Dec. 31, 2002. None since is on file, so it is not counted as a current finding.

Nitrate, arsenic and uranium: Rhode Island’s yearly averages per water system, as CDC’s Environmental Public Health Tracking Network publishes them, 2021 to 2023, with EPA’s 2012 to 2019 file for earlier years.

Fluoride and chromium (total): EPA’s compliance monitoring file, samples taken from March 19, 2012 to March 19, 2018. Newer results are in the utility’s annual water quality report.

Above the health goal1

Lead

Comes from pipes, often your own

Above the health goal

4.0ppb

90th percentile, 2022 to 2024

In the latest period, 9 in 10 homes sampled were at or below 4.0 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 limits3

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.49ppm

Highest yearly average, 2012 to 2018

2018 average: 0.082 ppm

Averaged by year, the highest was 0.49 ppm, in 2013, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 0.57 ppm. In 2018, the latest year on file, its five samples averaged 0.082 ppm.

What handles it

Nitrate

Comes from the source

Below EPA’s limits

1.1ppm

Highest yearly average, 2021

Averaged by year, the highest was 1.1 ppm, in 2021, below EPA’s legal limit of 10 ppm. That is the only year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 3.0 ppm, in 2015.

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

4.5ppb

Highest yearly average, 2012 to 2018

2018: not found

Averaged by year, the highest was 4.5 ppb, in 2013, below EPA’s legal limit of 100 ppb. Its highest single sample was 5.0 ppb. In 2018, the latest year on file, it wasn’t found in any of its five samples.

What handles it

2 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic
  • Uranium

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

Contaminant or ruleTypePeriodMeasuredStatus
Revised Total Coliform RuleE. coli was confirmed in the water system.EPA: Maximum Contaminant Level Violation, E. coli (RTCR)Nov. 1, 2021 to Nov. 30, 2021—Resolved
Combined Radium (-226 and -228)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJan. 1, 2020 to March 31, 20209.0 PCI/LResolved
Combined Radium (-226 and -228)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageOct. 1, 2019 to Dec. 31, 201910 PCI/LResolved
Combined Radium (-226 and -228)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJuly 1, 2019 to Sept. 30, 201910 PCI/LResolved
Combined Radium (-226 and -228)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageApril 1, 2019 to June 30, 201910 PCI/LResolved
Combined Radium (-226 and -228)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJan. 1, 2019 to March 31, 20197.0 PCI/LResolved
Revised Total Coliform RuleFixes required after coliform results were not made on time.EPA: Treatment Technique, Corrective/Expedited Actions (RTCR)Nov. 20, 2018—Resolved
Revised Total Coliform RuleFixes required after coliform results were not made on time.EPA: Treatment Technique, Corrective/Expedited Actions (RTCR)Nov. 2, 2018—Resolved
Combined Radium (-226 and -228)A sample was above the legal limit, for a contaminant judged one sample at a time.EPA: Maximum Contaminant Level Violation, Single SampleJan. 1, 2017 to Dec. 31, 20198.2 PCI/LArchived
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 3 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Nitrate, arsenic and uranium results here are Rhode Island’s yearly averages as CDC publishes them, from 2021 on, with EPA’s national file for 2012 to 2019. Fluoride and chromium (total) come from EPA’s file alone, which ends in 2019. Canonchet Cliffs Water Association Inc.’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 Rhode Island cover 2021 to 2023; EPA’s compliance samples are from March 19, 2012 to March 19, 2018.

Testing your own tap

Canonchet Cliffs Water Association Inc.’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 Rhode Island certifies.

The 3 labs Rhode Island certifies closest to the area Canonchet Cliffs Water Association Inc. serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

All 6 certified labs for Rhode Island

Sources

PWSID RI1900053. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in Washington County

All Rhode Island utilities

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