Public water system · NH2051010

Active

Salem Water Dept

At a glance

Salem Water Dept (PWSID NH2051010) is an active community water system in Rockingham County, New Hampshire. It reports serving 21,000 people through 6,953 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. EPA's records list 10 violations for this system; 3 are health-based, and the most recent began in April 2024.

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

Population served

21,000

Service connections

6,953

Primary source

Surface water

System type

CWS

Community water system

System record

PWSIDNH2051010

System typeCommunity water system

Activity statusActive

Population served21,000

Service connections6,953

Primary water sourceSurface water

Owner typeLocal government

Primacy agencyNH state drinking water program

City servedSalem

StateNew Hampshire

ZIP—

CountyRockingham County

How does Salem Water Dept compare with other water systems in Rockingham County?

By EPA's size categories, Salem Water Dept is a large system (10,001 to 100,000 people). Rockingham County has 554 active public water systems, and Salem Water Dept is the 3rd-largest of them by population served. Its population served is about 43 times the county average of 492 people per system, and accounts for 7.7% of the 272,726 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 Salem Water Dept is about 3.1 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 Salem Water Dept?

EPA lists Salem 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. 70 of the 554 active systems in Rockingham County (13%) are also owned by a local government.

Does Salem Water Dept have drinking water violations?

EPA's records list 10 violations for this system; 3 are health-based, and the most recent began in April 2024. The violations listed here began between January 1992 and April 2024. By type: 5 monitoring and reporting, 2 public notice, recordkeeping or other, 2 required treatment not met and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (3 of them). EPA lists 10 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
2024-04-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2024-04-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2016-07-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Resolved
2014-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2014-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2014-05-14	Public notice, recordkeeping or otherRecord Keeping · code 09	Interim Enhanced Surface Water Treatment Rulecode 0300	No	Resolved
2008-10-01	Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72	Consumer Confidence Rulecode 7000	No	Resolved
2003-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Total trihalomethanes (TTHM)code 2950	Yes	Resolved
2003-01-01	Required treatment not metTreatment Technique (SWTR and GWR) · code 41	Surface Water Treatment Rulecode 0200	Yes	Resolved
1992-01-01	Required treatment not metFailure to Filter (SWTR) · code 42	Surface Water Treatment Rulecode 0200	Yes	Resolved

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.

Salem Water Dept: frequently asked questions

Who runs Salem Water Dept?

Salem Water Dept (PWSID NH2051010) is a community water system owned by a local government. It is regulated by the NH state drinking water program.

How many people does Salem Water Dept serve?

Salem Water Dept reports serving 21,000 people through 6,953 service connections in Rockingham County, New Hampshire.

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

EPA's records list 10 violations for this system; 3 are health-based, and the most recent began in April 2024. 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 Salem 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. EPA's records list 10 violations for this system; 3 are health-based, and the most recent began in April 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the NH state drinking water program.

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

As a community water system, Salem 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 Rockingham County

Water system	County	Population served	Type	Source
Aquarion Water/Nh	Rockingham	34,000	Community	Groundwater
Portsmouth Water Works	Rockingham	33,000	Community	Surface water
Derry Water Dept	Rockingham	17,370	Community	Purchased surface water
Seabrook Water Dept	Rockingham	14,000	Community	Groundwater
Exeter Water Dept	Rockingham	12,236	Community	Surface water
Pease Trade Port	Rockingham	9,900	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, “Salem Water Dept, PWSID NH2051010, New Hampshire”, https://aquacensus.com/water-systems/new-hampshire/salem-water-dept-nh2051010 (data as of October 1, 2026).