Public water system · MA4350001
ActiveWrentham Developmental Center
At a glance
Wrentham Developmental Center (PWSID MA4350001) is an active community water system in Norfolk County, Massachusetts. It reports serving 937 people through 59 service connections. Its primary water source is groundwater, and EPA lists it as owned by a state government. Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in December 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
937
Service connections
59
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Wrentham Developmental Center compare with other water systems in Norfolk County?
By EPA's size categories, Wrentham Developmental Center is a small system (501 to 3,300 people). Norfolk County has 58 active public water systems. Its population served is well below the county average of 14,602 people per system, and accounts for 0.1% of the 846,897 people reported by systems filed under the county. Across Massachusetts, the 1,636 active systems average 6,275 people each. Nationally, the average active community water system reports serving 6,703 people, so Wrentham Developmental Center is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Massachusetts has 531 active community water systems, 32% of the state's 1,636 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,354 Massachusetts systems (83%) list groundwater as their primary source.
Who owns and regulates Wrentham Developmental Center?
EPA lists Wrentham Developmental Center as owned by a state government. The MA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 2 of the 58 active systems in Norfolk County (3.4%) are also owned by a state government.
Does Wrentham Developmental Center have drinking water violations?
Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in December 2024. The violations listed here began between November 1994 and December 2024. By type: 4 contaminant level above the legal limit, 3 public notice, recordkeeping or other, 2 reporting, 2 required treatment not met and 1 monitoring and reporting. The contaminant or rule involved most often is Revised Total Coliform Rule (5 of them). EPA lists 11 as resolved and 1 as archived. 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-12-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, E. coli (RTCR) · code 1A | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2022-12-06 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2022-11-14 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2022-11-06 | ReportingNotify Level 1/Level 2 Treatment Technique Violation, Correct Action (RTCR) · code 4F | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2022-11-05 | Required treatment not metTreatment Technique, Level 2 Assessment (RTCR) · code 2B | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2022-01-11 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2021-12-12 | ReportingNotify Level 1/Level 2 Treatment Technique Violation, Correct Action (RTCR) · code 4F | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-12-11 | Required treatment not metTreatment Technique, Level 1 Assessment (RTCR) · code 2A | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2021-11-13 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2004-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1995-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1994-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
The 12 most recent 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.
Wrentham Developmental Center: frequently asked questions
Who runs Wrentham Developmental Center?
Wrentham Developmental Center (PWSID MA4350001) is a community water system owned by a state government. It is regulated by the MA state drinking water program.
How many people does Wrentham Developmental Center serve?
Wrentham Developmental Center reports serving 937 people through 59 service connections in Norfolk County, Massachusetts.
Where does Wrentham Developmental Center 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 Wrentham Developmental Center have any drinking water violations?
Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in December 2024. 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 Wrentham Developmental Center'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. Of the 12 most recent violations in EPA's records, 6 are health-based, and the most recent began in December 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the MA state drinking water program.
Where can I find Wrentham Developmental Center's water quality report?
As a community water system, Wrentham Developmental Center must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Norfolk County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Quincy Water Dept. (MWRA) | Norfolk | 106,000 | Community | Purchased surface water |
| Brookline Water and Sewer Division | Norfolk | 63,191 | Community | Purchased surface water |
| Weymouth Water Department | Norfolk | 57,871 | Community | Surface water |
| Randolph/Holbrook Joint Water Board | Norfolk | 46,519 | Community | Surface water |
| Dedham Westwood Water Dist. | Norfolk | 41,630 | Community | Purchased surface water |
| Braintree Water and Sewer Dept. | Norfolk | 39,143 | Community | Surface water |
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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, “Wrentham Developmental Center, PWSID MA4350001, Massachusetts”, https://aquacensus.com/water-systems/massachusetts/wrentham-developmental-center-ma4350001 (data as of October 1, 2026).