Public water system · NH1481010
ActiveMarlborough Water Works
At a glance
Marlborough Water Works (PWSID NH1481010) is an active community water system in Cheshire County, New Hampshire. It reports serving 750 people through 300 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, one is health-based, and the most recent began in August 2010.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
750
Service connections
300
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Marlborough Water Works compare with other water systems in Cheshire County?
By EPA's size categories, Marlborough Water Works is a small system (501 to 3,300 people). Cheshire County has 169 active public water systems. Its population served is about 84% above the county average of 409 people per system, and accounts for 1.1% of the 69,037 people reported by systems filed under the county. Across New Hampshire, the 2,450 active systems average 508 people each. Nationally, the average active community water system reports serving 6,703 people, so Marlborough Water Works is well 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. New Hampshire has 706 active community water systems, 29% of the state's 2,450 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,374 New Hampshire systems (97%) list groundwater as their primary source.
Who owns and regulates Marlborough Water Works?
EPA lists Marlborough Water Works as owned by a local government. The NH state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 37 of the 169 active systems in Cheshire County (22%) are also owned by a local government.
Does Marlborough Water Works have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in August 2010. The violations listed here began between September 1995 and August 2010. By type: 10 monitoring and reporting, 1 contaminant level above the legal limit and 1 public notice, recordkeeping or other. The contaminants or rules involved are Total coliform bacteria (TCR), Consumer Confidence Rule, 1,2,4-Trichlorobenzene and Carbon tetrachloride. 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 |
|---|---|---|---|---|
| 2010-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2010-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 1995-09-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | No | Resolved |
| 1995-09-01 | Monitoring and reportingMonitoring, Regular · code 03 | Carbon tetrachloridecode 2982 | No | Resolved |
| 1995-09-01 | Monitoring and reportingMonitoring, Regular · code 03 | o-Dichlorobenzenecode 2968 | No | Resolved |
| 1995-09-01 | Monitoring and reportingMonitoring, Regular · code 03 | Tetrachloroethylenecode 2987 | No | Resolved |
| 1995-09-01 | Monitoring and reportingMonitoring, Regular · code 03 | trans-1,2-Dichloroethylenecode 2979 | No | Resolved |
| 1995-09-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dichloromethanecode 2964 | No | Resolved |
| 1995-09-01 | Monitoring and reportingMonitoring, Regular · code 03 | cis-1,2-Dichloroethylenecode 2380 | No | Resolved |
| 1995-09-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,2-Trichloroethanecode 2985 | No | Resolved |
| 1995-09-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,1-Trichloroethanecode 2981 | No | Resolved |
| 1995-09-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloroethanecode 2980 | No | 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.
Marlborough Water Works: frequently asked questions
Who runs Marlborough Water Works?
Marlborough Water Works (PWSID NH1481010) is a community water system owned by a local government. It is regulated by the NH state drinking water program.
How many people does Marlborough Water Works serve?
Marlborough Water Works reports serving 750 people through 300 service connections in Cheshire County, New Hampshire.
Where does Marlborough Water Works 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 Marlborough Water Works have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in August 2010. 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 Marlborough Water Works' 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, one is health-based, and the most recent began in August 2010. For current results, consult the system's annual water quality report, EPA ECHO, or the NH state drinking water program.
Where can I find Marlborough Water Works' water quality report?
As a community water system, Marlborough Water Works 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 Cheshire County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Keene Water Dept | Cheshire | 30,000 | Community | Surface water |
| Jaffrey Water Works | Cheshire | 3,800 | Community | Groundwater |
| Winchester Water Dept | Cheshire | 2,800 | Community | Groundwater |
| North Hinsdale Water Dept | Cheshire | 1,800 | Community | Groundwater |
| N Swanzey Water and Fire Prct | Cheshire | 1,700 | Community | Purchased surface water |
| Franklin Pierce University | Cheshire | 1,638 | Non-transient non-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, “Marlborough Water Works, PWSID NH1481010, New Hampshire”, https://aquacensus.com/water-systems/new-hampshire/marlborough-water-works-nh1481010 (data as of October 1, 2026).