Public water system · NH0381010
ActiveCarroll Water Works
At a glance
Carroll Water Works (PWSID NH0381010) is an active community water system in Coos County, New Hampshire. It reports serving 875 people through 350 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list one violation for this system; it is health-based, and the most recent began in January 1992.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
875
Service connections
350
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Carroll Water Works compare with other water systems in Coos County?
By EPA's size categories, Carroll Water Works is a small system (501 to 3,300 people). Coos County has 112 active public water systems. Its population served is about 138% above the county average of 368 people per system, and accounts for 2.1% of the 41,217 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 Carroll Water Works 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 Carroll Water Works?
EPA lists Carroll Water Works 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. 18 of the 112 active systems in Coos County (16%) are also owned by a local government.
Does Carroll Water Works have drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in January 1992. By type: 1 required treatment not met. The contaminant or rule involved is Surface Water Treatment Rule. EPA lists 1 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 |
|---|---|---|---|---|
| 1992-01-01 | Required treatment not metFailure to Filter (SWTR) · code 42 | Surface Water Treatment Rulecode 0200 | Yes | Resolved |
The one violation in EPA's records. 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.
Carroll Water Works: frequently asked questions
Who runs Carroll Water Works?
Carroll Water Works (PWSID NH0381010) is a community water system owned by a local government. It is regulated by the NH state drinking water program.
How many people does Carroll Water Works serve?
Carroll Water Works reports serving 875 people through 350 service connections in Coos County, New Hampshire.
Where does Carroll Water Works 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 Carroll Water Works have any drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in January 1992. 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 Carroll Water Works' 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 one violation for this system; it is health-based, and the most recent began in January 1992. For current results, consult the system's annual water quality report, EPA ECHO, or the NH state drinking water program.
Where can I find Carroll Water Works' water quality report?
As a community water system, Carroll Water Works 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 Coos County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Berlin Water Works | Coos | 9,575 | Community | Surface water |
| Groveton Water Sys | Coos | 2,650 | Community | Groundwater |
| Gorham Water and Sewer Dept | Coos | 2,630 | Community | Surface water |
| Lancaster Water Dept | Coos | 2,500 | Community | Surface water |
| Whitefield Water | Coos | 1,640 | Community | Groundwater |
| Colebrook Water Works | Coos | 1,300 | 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, “Carroll Water Works, PWSID NH0381010, New Hampshire”, https://aquacensus.com/water-systems/new-hampshire/carroll-water-works-nh0381010 (data as of October 1, 2026).