Public water system · MA1111027
ActiveHalon Plaza
At a glance
Halon Plaza (PWSID MA1111027) is an active transient non-community water system in Hampshire County, Massachusetts. It reports serving 250 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 10 violations for this system; 1 is health-based, and the most recent began in December 2019.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
250
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Halon Plaza compare with other water systems in Hampshire County?
By EPA's size categories, Halon Plaza is a very small system (500 people or fewer). Hampshire County has 94 active public water systems. Its population served is well below the county average of 1,556 people per system, and accounts for 0.2% of the 146,285 people reported by systems filed under the county. Across Massachusetts, the 1,636 active systems average 6,275 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Halon Plaza is about 74% above that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Massachusetts has 859 active transient non-community water systems, 53% 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 Halon Plaza?
EPA lists Halon Plaza as privately owned. 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. 62 of the 94 active systems in Hampshire County (66%) are also privately owned.
Does Halon Plaza have drinking water violations?
EPA's records list 10 violations for this system; 1 is health-based, and the most recent began in December 2019. The violations listed here began between July 1995 and December 2019. By type: 7 monitoring and reporting, 2 reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 of them). EPA lists 7 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 |
|---|---|---|---|---|
| 2019-12-01 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-11-01 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2009-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1999-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Archived |
| 1998-11-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1996-06-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1996-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Archived |
| 1996-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Archived |
| 1996-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1995-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 10 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.
Halon Plaza: frequently asked questions
Who runs Halon Plaza?
Halon Plaza (PWSID MA1111027) is a transient non-community water system privately owned. It is regulated by the MA state drinking water program.
How many people does Halon Plaza serve?
Halon Plaza reports serving 250 people through 1 service connection in Hampshire County, Massachusetts.
Where does Halon Plaza 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 Halon Plaza have any drinking water violations?
EPA's records list 10 violations for this system; 1 is health-based, and the most recent began in December 2019. 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 Halon Plaza'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 10 violations for this system; 1 is health-based, and the most recent began in December 2019. For current results, consult EPA ECHO, or the MA state drinking water program.
Where can I find Halon Plaza's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Halon Plaza is a 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 Hampshire County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Amherst Dpw Water Division | Hampshire | 39,263 | Community | Surface water |
| Northampton Water Division | Hampshire | 29,571 | Community | Surface water |
| Easthampton Water Dept | Hampshire | 16,211 | Community | Groundwater |
| South Hadley Fd #1 (MWRA) | Hampshire | 14,800 | Community | Purchased surface water |
| Ware Water Dept | Hampshire | 10,066 | Community | Groundwater |
| South Hadley Fire District #2 Water Dept | Hampshire | 6,200 | Community | Groundwater |
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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, “Halon Plaza, PWSID MA1111027, Massachusetts”, https://aquacensus.com/water-systems/massachusetts/halon-plaza-ma1111027 (data as of October 1, 2026).