Public water system · NH0501010
ActiveConcord Water Dept
At a glance
Concord Water Dept (PWSID NH0501010) is an active community water system in Merrimack County, New Hampshire. It reports serving 44,215 people through 12,572 service connections. Its primary water source is surface water, 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 October 2003.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
44,215
Service connections
12,572
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Concord Water Dept compare with other water systems in Merrimack County?
By EPA's size categories, Concord Water Dept is a large system (10,001 to 100,000 people). Merrimack County has 244 active public water systems, and Concord Water Dept is the largest of them by population served. Its population served is about 87 times the county average of 509 people per system, and accounts for 36% of the 124,152 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 Concord Water Dept is about 6.6 times 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 39 New Hampshire systems (1.6%) list surface water as their primary source.
Who owns and regulates Concord Water Dept?
EPA lists Concord Water Dept 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. 40 of the 244 active systems in Merrimack County (16%) are also owned by a local government.
Does Concord Water Dept have drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in October 2003. By type: 1 required treatment not met. The contaminant or rule involved is Carbon, total. 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 |
|---|---|---|---|---|
| 2003-10-01 | Required treatment not metTreatment Technique Precursor Removal · code 46 | Carbon, totalcode 2920 | 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.
Concord Water Dept: frequently asked questions
Who runs Concord Water Dept?
Concord Water Dept (PWSID NH0501010) is a community water system owned by a local government. It is regulated by the NH state drinking water program.
How many people does Concord Water Dept serve?
Concord Water Dept reports serving 44,215 people through 12,572 service connections in Merrimack County, New Hampshire.
Where does Concord Water Dept get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Concord Water Dept have any drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in October 2003. 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 Concord Water Dept'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 one violation for this system; it is health-based, and the most recent began in October 2003. For current results, consult the system's annual water quality report, EPA ECHO, or the NH state drinking water program.
Where can I find Concord Water Dept's water quality report?
As a community water system, Concord Water Dept 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 Merrimack County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Franklin Water Works | Merrimack | 7,200 | Community | Groundwater |
| Pembroke Water Works | Merrimack | 5,200 | Community | Groundwater |
| Central Hooksett Water Pct | Merrimack | 4,650 | Community | Purchased surface water |
| Penacook Boscawen Water Pct | Merrimack | 3,800 | Community | Groundwater |
| New London Springfield Water | Merrimack | 3,250 | Community | Groundwater |
| Hooksett Village Water Pct | Merrimack | 3,000 | 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, “Concord Water Dept, PWSID NH0501010, New Hampshire”, https://aquacensus.com/water-systems/new-hampshire/concord-water-dept-nh0501010 (data as of October 1, 2026).