Public water system · NH0805010

Active

Building Block Commons

At a glance

Building Block Commons (PWSID NH0805010) is an active non-transient non-community water system in Rockingham County, New Hampshire. It reports serving 78 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in July 2014.

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

Population served

Service connections

Primary source

Groundwater

System type

NTNCWS

Non-transient non-community water system

System record

PWSIDNH0805010

System typeNon-transient non-community water system

Activity statusActive

Population served78

Service connections1

Primary water sourceGroundwater

Owner typePrivate

Primacy agencyNH state drinking water program

City servedExeter

StateNew Hampshire

ZIP—

CountyRockingham County

How does Building Block Commons compare with other water systems in Rockingham County?

By EPA's size categories, Building Block Commons is a very small system (500 people or fewer). Rockingham County has 554 active public water systems. Its population served is well below the county average of 492 people per system, and accounts for less than 0.1% 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 non-transient non-community water system reports serving 430 people, so Building Block Commons is well below that figure.

What does “non-transient non-community water system” mean?

A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. New Hampshire has 453 active non-transient non-community water systems, 18% 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 Building Block Commons?

EPA lists Building Block Commons as privately owned. 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. 477 of the 554 active systems in Rockingham County (86%) are also privately owned.

Does Building Block Commons have drinking water violations?

Of the 12 most recent violations in EPA's records, 5 are health-based, and the most recent began in July 2014. The violations listed here began between January 1995 and July 2014. By type: 7 monitoring and reporting and 5 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 of them). EPA lists 7 as archived and 5 as resolved. 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. 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
2014-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2011-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2008-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2007-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
2001-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
1995-01-01	Monitoring and reportingMonitoring, Regular · code 03	Xylenes, Totalcode 2955	No	Archived
1995-01-01	Monitoring and reportingMonitoring, Regular · code 03	1,2-Dichloroethanecode 2980	No	Archived
1995-01-01	Monitoring and reportingMonitoring, Regular · code 03	o-Dichlorobenzenecode 2968	No	Archived
1995-01-01	Monitoring and reportingMonitoring, Regular · code 03	Carbon tetrachloridecode 2982	No	Archived
1995-01-01	Monitoring and reportingMonitoring, Regular · code 03	cis-1,2-Dichloroethylenecode 2380	No	Archived
1995-01-01	Monitoring and reportingMonitoring, Regular · code 03	Chlorobenzenecode 2989	No	Archived
1995-01-01	Monitoring and reportingMonitoring, Regular · code 03	p-Dichlorobenzenecode 2969	No	Archived

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.

Building Block Commons: frequently asked questions

Who runs Building Block Commons?

Building Block Commons (PWSID NH0805010) is a non-transient non-community water system privately owned. It is regulated by the NH state drinking water program.

How many people does Building Block Commons serve?

Building Block Commons reports serving 78 people through 1 service connection in Rockingham County, New Hampshire.

Where does Building Block Commons 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 Building Block Commons 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 July 2014. 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 Building Block Commons' 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 July 2014. For current results, consult EPA ECHO, or the NH state drinking water program.

Where can I find Building Block Commons' water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Building Block Commons is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.

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
Salem Water Dept	Rockingham	21,000	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

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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, “Building Block Commons, PWSID NH0805010, New Hampshire”, https://aquacensus.com/water-systems/new-hampshire/building-block-commons-nh0805010 (data as of October 1, 2026).