Public water system · MA3073000
ActiveDedham Westwood Water Dist.
At a glance
Dedham Westwood Water Dist. (PWSID MA3073000) is an active community water system in Norfolk County, Massachusetts. It reports serving 41,630 people through 13,335 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in October 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
41,630
Service connections
13,335
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Dedham Westwood Water Dist. compare with other water systems in Norfolk County?
By EPA's size categories, Dedham Westwood Water Dist. is a large system (10,001 to 100,000 people). Norfolk County has 58 active public water systems, and Dedham Westwood Water Dist. is the 5th-largest of them by population served. Its population served is about 185% above the county average of 14,602 people per system, and accounts for 4.9% 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 Dedham Westwood Water Dist. is about 6.2 times 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 126 Massachusetts systems (7.7%) list purchased surface water as their primary source.
Who owns and regulates Dedham Westwood Water Dist.?
EPA lists Dedham Westwood Water Dist. 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 Dedham Westwood Water Dist. have drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in October 2021. The violations listed here began between May 1994 and October 2021. By type: 2 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 2 as archived and 1 as resolved. 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. 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 |
|---|---|---|---|---|
| 2021-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 1994-06-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1994-05-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 3 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.
Dedham Westwood Water Dist.: frequently asked questions
Who runs Dedham Westwood Water Dist.?
Dedham Westwood Water Dist. (PWSID MA3073000) is a community water system owned by a local government. It is regulated by the MA state drinking water program.
How many people does Dedham Westwood Water Dist. serve?
Dedham Westwood Water Dist. reports serving 41,630 people through 13,335 service connections in Norfolk County, Massachusetts.
Where does Dedham Westwood Water Dist. get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Dedham Westwood Water Dist. have any drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in October 2021. 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 Dedham Westwood Water Dist.'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 3 violations for this system; 1 is health-based, and the most recent began in October 2021. For current results, consult the system's annual water quality report, EPA ECHO, or the MA state drinking water program.
Where can I find Dedham Westwood Water Dist.'s water quality report?
As a community water system, Dedham Westwood Water Dist. 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 |
| Braintree Water and Sewer Dept. | Norfolk | 39,143 | Community | Surface water |
| Bluedrop Water @ St Bernadette Church | Norfolk | 35,114 | Transient non-community | Purchased 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, “Dedham Westwood Water Dist., PWSID MA3073000, Massachusetts”, https://aquacensus.com/water-systems/massachusetts/dedham-westwood-water-dist-ma3073000 (data as of October 1, 2026).