Public water system · NH0991010

Active

Greenville Water Dept

At a glance

Greenville Water Dept (PWSID NH0991010) is an active community water system in Hillsborough County, New Hampshire. It reports serving 1,100 people through 440 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in November 2025.

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

Population served

1,100

Service connections

440

Primary source

Surface water

System type

CWS

Community water system

System record

PWSIDNH0991010

System typeCommunity water system

Activity statusActive

Population served1,100

Service connections440

Primary water sourceSurface water

Owner typeLocal government

Primacy agencyNH state drinking water program

City servedGreenville

StateNew Hampshire

ZIP—

CountyHillsborough County

How does Greenville Water Dept compare with other water systems in Hillsborough County?

By EPA's size categories, Greenville Water Dept is a small system (501 to 3,300 people). Hillsborough County has 279 active public water systems. Its population served is roughly in line with the county average of 1,206 people per system, and accounts for 0.3% 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 Greenville Water Dept 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. 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 Greenville Water Dept?

EPA lists Greenville Water Dept 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 Greenville Water Dept have drinking water violations?

Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in November 2025. The violations listed here began between January 1997 and November 2025. By type: 5 monitoring and reporting, 4 required treatment not met, 2 public notice, recordkeeping or other and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Surface Water Treatment Rule (5 of them). 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
2025-11-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved
2025-07-11	Monitoring and reportingWater Quality Parameter M/R · code 53	Lead and Copper Rulecode 5000	No	Resolved
2018-05-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Carbon, totalcode 2920	No	Resolved
2018-04-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Carbon, totalcode 2920	No	Resolved
2017-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Carbon, totalcode 2920	No	Resolved
2010-10-01	Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72	Consumer Confidence Rulecode 7000	No	Resolved
2008-10-01	Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72	Consumer Confidence Rulecode 7000	No	Resolved
2000-08-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	Resolved
1999-11-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	Resolved
1998-08-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	Resolved
1998-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21	Total coliform bacteria (TCR)code 3100	Yes	Resolved
1997-01-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	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.

Greenville Water Dept: frequently asked questions

Who runs Greenville Water Dept?

Greenville Water Dept (PWSID NH0991010) is a community water system owned by a local government. It is regulated by the NH state drinking water program.

How many people does Greenville Water Dept serve?

Greenville Water Dept reports serving 1,100 people through 440 service connections in Hillsborough County, New Hampshire.

Where does Greenville Water Dept 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 Greenville Water Dept have any drinking water violations?

Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in November 2025. 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 Greenville Water Dept'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, 5 are health-based, and the most recent began in November 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the NH state drinking water program.

Where can I find Greenville Water Dept's water quality report?

As a community water system, Greenville Water Dept 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
Manchester Water Works	Hillsborough	123,500	Community	Surface water
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

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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, “Greenville Water Dept, PWSID NH0991010, New Hampshire”, https://aquacensus.com/water-systems/new-hampshire/greenville-water-dept-nh0991010 (data as of October 1, 2026).