Public water system · NH0112090
ActiveDearborn Ridge
At a glance
Dearborn Ridge (PWSID NH0112090) is an active community water system in Rockingham County, New Hampshire. It reports serving 27 people through 11 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 2 violations for this system; all are health-based, and the most recent began in April 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
27
Service connections
11
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Dearborn Ridge compare with other water systems in Rockingham County?
By EPA's size categories, Dearborn Ridge 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 community water system reports serving 6,703 people, so Dearborn Ridge 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 Dearborn Ridge?
EPA lists Dearborn Ridge 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 Dearborn Ridge have drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in April 2020. The violations listed here began between July 2001 and April 2020. By type: 2 contaminant level above the legal limit. The contaminants or rules involved are Arsenic and Total coliform bacteria (TCR). EPA lists 2 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 |
|---|---|---|---|---|
| 2020-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | 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 |
All 2 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.
Dearborn Ridge: frequently asked questions
Who runs Dearborn Ridge?
Dearborn Ridge (PWSID NH0112090) is a community water system privately owned. It is regulated by the NH state drinking water program.
How many people does Dearborn Ridge serve?
Dearborn Ridge reports serving 27 people through 11 service connections in Rockingham County, New Hampshire.
Where does Dearborn Ridge 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 Dearborn Ridge have any drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in April 2020. 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 Dearborn Ridge'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 2 violations for this system; all are health-based, and the most recent began in April 2020. For current results, consult the system's annual water quality report, EPA ECHO, or the NH state drinking water program.
Where can I find Dearborn Ridge's water quality report?
As a community water system, Dearborn Ridge 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, “Dearborn Ridge, PWSID NH0112090, New Hampshire”, https://aquacensus.com/water-systems/new-hampshire/dearborn-ridge-nh0112090 (data as of October 1, 2026).