Public water system · MA1061003

Active

Westover Arb

At a glance

Westover Arb (PWSID MA1061003) is an active non-transient non-community water system in Hampden County, Massachusetts. It reports serving 950 people through 208 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by the federal government. EPA's records list 9 violations for this system; 8 are health-based, and the most recent began in January 2020.

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

Population served

950

Service connections

208

Primary source

SWP

Purchased surface water

System type

NTNCWS

Non-transient non-community water system

System record

PWSIDMA1061003

System typeNon-transient non-community water system

Activity statusActive

Population served950

Service connections208

Primary water sourcePurchased surface water

Owner typeFederal government

Primacy agencyMA state drinking water program

City servedChicopee

StateMassachusetts

ZIP01022

CountyHampden County

How does Westover Arb compare with other water systems in Hampden County?

By EPA's size categories, Westover Arb is a small system (501 to 3,300 people). Hampden County has 115 active public water systems. Its population served is well below the county average of 3,821 people per system, and accounts for 0.2% of the 439,404 people reported by systems filed under the county. Across Massachusetts, the 1,636 active systems average 6,275 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Westover Arb is about 121% above 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. Massachusetts has 246 active non-transient non-community water systems, 15% 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 Westover Arb?

EPA lists Westover Arb as owned by the federal 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 115 active systems in Hampden County (1.7%) are also owned by the federal government.

Does Westover Arb have drinking water violations?

EPA's records list 9 violations for this system; 8 are health-based, and the most recent began in January 2020. The violations listed here began between August 1991 and January 2020. By type: 8 contaminant level above the legal limit and 1 monitoring and reporting. The contaminant or rule involved most often is Haloacetic acids (HAA5) (5 of them). EPA lists 5 as resolved, 3 as archived and 1 as addressed. 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. Addressed means the violation is not resolved or archived and is covered by formal enforcement.

Began	Violation	Contaminant or rule	Health-based	Status
2020-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	Yes	Resolved
2019-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	Yes	Resolved
2019-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	Yes	Resolved
2019-04-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	Yes	Resolved
2019-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	Yes	Resolved
2015-06-01	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Addressed
1995-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Archived
1995-09-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Archived
1991-08-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21	Total coliform bacteria (TCR)code 3100	Yes	Archived

All 9 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.

Westover Arb: frequently asked questions

Who runs Westover Arb?

Westover Arb (PWSID MA1061003) is a non-transient non-community water system owned by the federal government. It is regulated by the MA state drinking water program.

How many people does Westover Arb serve?

Westover Arb reports serving 950 people through 208 service connections in Hampden County, Massachusetts.

Where does Westover Arb 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 Westover Arb have any drinking water violations?

EPA's records list 9 violations for this system; 8 are health-based, and the most recent began in January 2020. 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 Westover Arb'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 9 violations for this system; 8 are health-based, and the most recent began in January 2020. For current results, consult EPA ECHO, or the MA state drinking water program.

Where can I find Westover Arb's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Westover Arb 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 Hampden County

Water system	County	Population served	Type	Source
Springfield Water and Sewer Commission	Hampden	169,170	Community	Surface water
Chicopee Water Dept (MWRA)	Hampden	55,560	Community	Purchased surface water
Westfield Dpwwater Division	Hampden	41,094	Community	Surface water
Holyoke Water Works	Hampden	37,838	Community	Surface water
West Springfield Dpw Water Division	Hampden	28,835	Community	Groundwater
Agawam Water Department	Hampden	28,692	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, “Westover Arb, PWSID MA1061003, Massachusetts”, https://aquacensus.com/water-systems/massachusetts/westover-arb-ma1061003 (data as of October 1, 2026).