Public water system · RI1858425

Active

Wilbur and Mcmahon School

At a glance

Wilbur and Mcmahon School (PWSID RI1858425) is an active non-transient non-community water system in Newport County, Rhode Island. It reports serving 458 people through 5 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 10 violations for this system; 5 are health-based, and the most recent began in April 2022.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

458

Service connections

Primary source

Groundwater

System type

NTNCWS

Non-transient non-community water system

System record

PWSIDRI1858425

System typeNon-transient non-community water system

Activity statusActive

Population served458

Service connections5

Primary water sourceGroundwater

Owner typeLocal government

Primacy agencyRI state drinking water program

City servedLittle Compton

StateRhode Island

ZIP—

CountyNewport County

How does Wilbur and Mcmahon School compare with other water systems in Newport County?

By EPA's size categories, Wilbur and Mcmahon School is a very small system (500 people or fewer). Newport County has 47 active public water systems. Its population served is well below the county average of 2,018 people per system, and accounts for 0.5% of the 94,859 people reported by systems filed under the county. Across Rhode Island, the 465 active systems average 2,508 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Wilbur and Mcmahon School is roughly in line with that figure.

What does “non-transient non-community water system” mean?

A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Rhode Island has 81 active non-transient non-community water systems, 17% of the state's 465 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 428 Rhode Island systems (92%) list groundwater as their primary source.

Who owns and regulates Wilbur and Mcmahon School?

EPA lists Wilbur and Mcmahon School as owned by a local government. The RI state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 7 of the 47 active systems in Newport County (15%) are also owned by a local government.

Does Wilbur and Mcmahon School have drinking water violations?

EPA's records list 10 violations for this system; 5 are health-based, and the most recent began in April 2022. The violations listed here began between April 1995 and April 2022. By type: 5 monitoring and reporting, 4 contaminant level above the legal limit and 1 required treatment not met. The contaminant or rule involved most often is Lead and Copper Rule (5 of them). EPA lists 10 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.

Began	Violation	Contaminant or rule	Health-based	Status
2022-04-01	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2017-12-24	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2015-10-26	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2015-10-01	Required treatment not metPublic Education · code 65	Lead and Copper Rulecode 5000	Yes	Resolved
2014-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2002-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
1998-12-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
1998-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
1995-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
1995-04-01	Monitoring and reportingMonitoring, Regular · code 03	Atrazinecode 2050	No	Resolved

All 10 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.

Wilbur and Mcmahon School: frequently asked questions

Who runs Wilbur and Mcmahon School?

Wilbur and Mcmahon School (PWSID RI1858425) is a non-transient non-community water system owned by a local government. It is regulated by the RI state drinking water program.

How many people does Wilbur and Mcmahon School serve?

Wilbur and Mcmahon School reports serving 458 people through 5 service connections in Newport County, Rhode Island.

Where does Wilbur and Mcmahon School get its water?

EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.

Does Wilbur and Mcmahon School have any drinking water violations?

EPA's records list 10 violations for this system; 5 are health-based, and the most recent began in April 2022. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.

Is Wilbur and Mcmahon School's water safe to drink?

AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 10 violations for this system; 5 are health-based, and the most recent began in April 2022. For current results, consult EPA ECHO, or the RI state drinking water program.

Where can I find Wilbur and Mcmahon School's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Wilbur and Mcmahon School is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.

Other water systems in Newport County

Water system	County	Population served	Type	Source
Newport-City of	Newport	42,155	Community	Surface water
Portsmouth Water & Fire District	Newport	17,090	Community	Purchased surface water
North Tiverton Fire District	Newport	8,969	Community	Purchased surface water
Naval Station, Newport	Newport	7,870	Community	Purchased surface water
Jamestown Water Department	Newport	3,348	Community	Surface water
Tiverton Water Authority, Town Hall	Newport	3,213	Community	Purchased surface water

Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.

About this data

Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.

Cite as: AquaCensus, “Wilbur and Mcmahon School, PWSID RI1858425, Rhode Island”, https://aquacensus.com/water-systems/rhode-island/wilbur-and-mcmahon-school-ri1858425 (data as of October 1, 2026).