Public water system · MA2177000
ActiveMedway Water Department
At a glance
Medway Water Department (PWSID MA2177000) is an active community water system in Norfolk County, Massachusetts. It reports serving 14,176 people through 3,862 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in July 2017.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
14,176
Service connections
3,862
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Medway Water Department compare with other water systems in Norfolk County?
By EPA's size categories, Medway Water Department is a large system (10,001 to 100,000 people). Norfolk County has 58 active public water systems. Its population served is roughly in line with the county average of 14,602 people per system, and accounts for 1.7% 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 Medway Water Department is about twice 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 Medway Water Department?
EPA lists Medway Water Department as owned by a local 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. 30 of the 58 active systems in Norfolk County (52%) are also owned by a local government.
Does Medway Water Department have drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in July 2017. The violations listed here began between August 2008 and July 2017. By type: 7 monitoring and reporting, 3 public notice, recordkeeping or other and 2 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). EPA lists 12 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 |
|---|---|---|---|---|
| 2017-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2014-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2014-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2011-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2011-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2009-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2009-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Radium-226code 4020 | No | Resolved |
| 2009-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Radium-228code 4030 | No | Resolved |
| 2008-11-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2008-10-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2008-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | 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.
Medway Water Department: frequently asked questions
Who runs Medway Water Department?
Medway Water Department (PWSID MA2177000) is a community water system owned by a local government. It is regulated by the MA state drinking water program.
How many people does Medway Water Department serve?
Medway Water Department reports serving 14,176 people through 3,862 service connections in Norfolk County, Massachusetts.
Where does Medway Water Department 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 Medway Water Department have any drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in July 2017. 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 Medway Water Department'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, 2 are health-based, and the most recent began in July 2017. For current results, consult the system's annual water quality report, EPA ECHO, or the MA state drinking water program.
Where can I find Medway Water Department's water quality report?
As a community water system, Medway Water Department 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, “Medway Water Department, PWSID MA2177000, Massachusetts”, https://aquacensus.com/water-systems/massachusetts/medway-water-department-ma2177000 (data as of October 1, 2026).