Public water system · NH1471010
ActiveManchester Water Works
At a glance
Manchester Water Works (PWSID NH1471010) is an active community water system in Hillsborough County, New Hampshire. It reports serving 123,500 people through 32,061 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in July 2013.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
123,500
Service connections
32,061
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Manchester Water Works compare with other water systems in Hillsborough County?
By EPA's size categories, Manchester Water Works is a very large system (more than 100,000 people). Hillsborough County has 279 active public water systems, and Manchester Water Works is the largest of them by population served. Its population served is about 102 times the county average of 1,206 people per system, and accounts for 37% of the 336,507 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 Manchester Water Works is about 18 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. New Hampshire has 706 active community water systems, 29% of the state's 2,450 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 39 New Hampshire systems (1.6%) list surface water as their primary source.
Who owns and regulates Manchester Water Works?
EPA lists Manchester 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. 36 of the 279 active systems in Hillsborough County (13%) are also owned by a local government.
Does Manchester Water Works have drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in July 2013. The violations listed here began between December 2006 and July 2013. By type: 1 contaminant level above the legal limit and 1 monitoring and reporting. The contaminants or rules involved are Total coliform bacteria (TCR) and Surface Water Treatment Rule. EPA lists 2 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 |
|---|---|---|---|---|
| 2013-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2006-12-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
All 2 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.
Manchester Water Works: frequently asked questions
Who runs Manchester Water Works?
Manchester Water Works (PWSID NH1471010) is a community water system owned by a local government. It is regulated by the NH state drinking water program.
How many people does Manchester Water Works serve?
Manchester Water Works reports serving 123,500 people through 32,061 service connections in Hillsborough County, New Hampshire.
Where does Manchester Water Works get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Manchester Water Works have any drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in July 2013. 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 Manchester 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. EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in July 2013. For current results, consult the system's annual water quality report, EPA ECHO, or the NH state drinking water program.
Where can I find Manchester Water Works' water quality report?
As a community water system, Manchester 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 Hillsborough County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Pennichuck Water Works | Hillsborough | 88,853 | Community | Surface water |
| Merrimack Village Dist | Hillsborough | 25,500 | Community | Groundwater |
| Hudson Water Dept | Hillsborough | 16,700 | Community | Groundwater |
| Milford Water Utilities Dept | Hillsborough | 9,500 | Community | Purchased surface water |
| Litchfield | Hillsborough | 6,920 | Community | Purchased surface water |
| Peterborough Water Works | Hillsborough | 4,500 | 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, “Manchester Water Works, PWSID NH1471010, New Hampshire”, https://aquacensus.com/water-systems/new-hampshire/manchester-water-works-nh1471010 (data as of October 1, 2026).