Public water system · NH0911030

Active

Grasmere Wp/Landmark

At a glance

Grasmere Wp/Landmark (PWSID NH0911030) is an active community water system in Hillsborough County, New Hampshire. It reports serving 90 people through 16 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 11 violations for this system; 2 are health-based, and the most recent began in July 2024.

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

Population served

Service connections

Primary source

SWP

Purchased surface water

System type

CWS

Community water system

System record

PWSIDNH0911030

System typeCommunity water system

Activity statusActive

Population served90

Service connections16

Primary water sourcePurchased surface water

Owner typeLocal government

Primacy agencyNH state drinking water program

City servedGoffstown

StateNew Hampshire

ZIP—

CountyHillsborough County

How does Grasmere Wp/Landmark compare with other water systems in Hillsborough County?

By EPA's size categories, Grasmere Wp/Landmark is a very small system (500 people or fewer). Hillsborough County has 279 active public water systems. Its population served is well below the county average of 1,206 people per system, and accounts for less than 0.1% 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 Grasmere Wp/Landmark 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 27 New Hampshire systems (1.1%) list purchased surface water as their primary source.

Who owns and regulates Grasmere Wp/Landmark?

EPA lists Grasmere Wp/Landmark 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 Grasmere Wp/Landmark have drinking water violations?

EPA's records list 11 violations for this system; 2 are health-based, and the most recent began in July 2024. The violations listed here began between July 1993 and July 2024. By type: 7 monitoring and reporting, 2 public notice, recordkeeping or other and 2 contaminant level above the legal limit. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (4 of them). EPA lists 10 as resolved and 1 as archived. 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. 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.

Began	Violation	Contaminant or rule	Health-based	Status
2024-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2014-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
2012-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2012-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2005-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Total trihalomethanes (TTHM)code 2950	Yes	Resolved
2005-04-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Total trihalomethanes (TTHM)code 2950	Yes	Resolved
2005-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2005-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
1996-12-01	Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24	Total coliform bacteria (TCR)code 3100	No	Archived
1995-01-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
1993-07-01	Monitoring and reportingInitial Tap Sampling for Pb and Cu · code 51	Lead and Copper Rulecode 5000	No	Resolved

All 11 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.

Grasmere Wp/Landmark: frequently asked questions

Who runs Grasmere Wp/Landmark?

Grasmere Wp/Landmark (PWSID NH0911030) is a community water system owned by a local government. It is regulated by the NH state drinking water program.

How many people does Grasmere Wp/Landmark serve?

Grasmere Wp/Landmark reports serving 90 people through 16 service connections in Hillsborough County, New Hampshire.

Where does Grasmere Wp/Landmark get its water?

EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.

Does Grasmere Wp/Landmark have any drinking water violations?

EPA's records list 11 violations for this system; 2 are health-based, and the most recent began in July 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 Grasmere Wp/Landmark'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 11 violations for this system; 2 are health-based, and the most recent began in July 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 Grasmere Wp/Landmark's water quality report?

As a community water system, Grasmere Wp/Landmark 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, “Grasmere Wp/Landmark, PWSID NH0911030, New Hampshire”, https://aquacensus.com/water-systems/new-hampshire/grasmere-wp-landmark-nh0911030 (data as of October 1, 2026).