Public water system · NH2082060
ActiveCornerstone Estates
At a glance
Cornerstone Estates (PWSID NH2082060) is an active community water system in Rockingham County, New Hampshire. It reports serving 202 people through 81 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
202
Service connections
81
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Cornerstone Estates compare with other water systems in Rockingham County?
By EPA's size categories, Cornerstone Estates is a very small system (500 people or fewer). Rockingham County has 554 active public water systems. Its population served is about 59% 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 community water system reports serving 6,703 people, so Cornerstone Estates 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. 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 Cornerstone Estates?
EPA lists Cornerstone Estates 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 Cornerstone Estates have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Cornerstone Estates. For the latest compliance status, check EPA ECHO for current compliance history.
Cornerstone Estates: frequently asked questions
Who runs Cornerstone Estates?
Cornerstone Estates (PWSID NH2082060) is a community water system privately owned. It is regulated by the NH state drinking water program.
How many people does Cornerstone Estates serve?
Cornerstone Estates reports serving 202 people through 81 service connections in Rockingham County, New Hampshire.
Where does Cornerstone Estates 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 Cornerstone Estates have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Cornerstone Estates' 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 Safe Drinking Water Act records list no violations for this system. For current results, consult the system's annual water quality report, EPA ECHO, or the NH state drinking water program.
Where can I find Cornerstone Estates' water quality report?
As a community water system, Cornerstone Estates 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 |
| 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, “Cornerstone Estates, PWSID NH2082060, New Hampshire”, https://aquacensus.com/water-systems/new-hampshire/cornerstone-estates-nh2082060 (data as of October 1, 2026).