Public water system · MA4018000

Active

Town of Avon

At a glance

Town of Avon (PWSID MA4018000) is an active community water system in Norfolk County, Massachusetts. It reports serving 4,777 people through 1,689 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, 3 are health-based, and the most recent began in June 2016.

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

Population served

4,777

Service connections

1,689

Primary source

Groundwater

System type

CWS

Community water system

System record

PWSIDMA4018000

System typeCommunity water system

Activity statusActive

Population served4,777

Service connections1,689

Primary water sourceGroundwater

Owner typeLocal government

Primacy agencyMA state drinking water program

City servedAvon

StateMassachusetts

ZIP02322

CountyNorfolk County

How does Town of Avon compare with other water systems in Norfolk County?

By EPA's size categories, Town of Avon is a medium system (3,301 to 10,000 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 0.6% 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 Town of Avon is about 29% 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 Town of Avon?

EPA lists Town of Avon 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 Town of Avon have drinking water violations?

Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in June 2016. The violations listed here began between October 2008 and June 2016. By type: 8 monitoring and reporting, 2 required treatment not met, 1 public notice, recordkeeping or other and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Groundwater Rule (2 of them). EPA lists 9 as archived and 3 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
2016-06-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Groundwater Rulecode 0700	Yes	Resolved
2015-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2010-11-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2010-05-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Groundwater Rulecode 0700	Yes	Archived
2008-10-01	Monitoring and reportingMonitoring, Regular · code 03	1,2,4-Trichlorobenzenecode 2378	No	Archived
2008-10-01	Monitoring and reportingMonitoring, Regular · code 03	Benzenecode 2990	No	Archived
2008-10-01	Monitoring and reportingMonitoring, Regular · code 03	Ethylbenzenecode 2992	No	Archived
2008-10-01	Monitoring and reportingMonitoring, Regular · code 03	o-Dichlorobenzenecode 2968	No	Archived
2008-10-01	Monitoring and reportingMonitoring, Regular · code 03	cis-1,2-Dichloroethylenecode 2380	No	Archived
2008-10-01	Monitoring and reportingMonitoring, Regular · code 03	1,2-Dichloropropanecode 2983	No	Archived
2008-10-01	Monitoring and reportingMonitoring, Regular · code 03	Vinyl chloridecode 2976	No	Archived
2008-10-01	Monitoring and reportingMonitoring, Regular · code 03	1,1,1-Trichloroethanecode 2981	No	Archived

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.

Town of Avon: frequently asked questions

Who runs Town of Avon?

Town of Avon (PWSID MA4018000) is a community water system owned by a local government. It is regulated by the MA state drinking water program.

How many people does Town of Avon serve?

Town of Avon reports serving 4,777 people through 1,689 service connections in Norfolk County, Massachusetts.

Where does Town of Avon 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 Town of Avon have any drinking water violations?

Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in June 2016. 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 Town of Avon'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, 3 are health-based, and the most recent began in June 2016. For current results, consult the system's annual water quality report, EPA ECHO, or the MA state drinking water program.

Where can I find Town of Avon's water quality report?

As a community water system, Town of Avon 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, “Town of Avon, PWSID MA4018000, Massachusetts”, https://aquacensus.com/water-systems/massachusetts/town-of-avon-ma4018000 (data as of October 1, 2026).