Public water system · NH2521010
ActiveWilton Water Works
At a glance
Wilton Water Works (PWSID NH2521010) is an active community water system in Hillsborough County, New Hampshire. It reports serving 1,790 people through 716 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 1995.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,790
Service connections
716
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Wilton Water Works compare with other water systems in Hillsborough County?
By EPA's size categories, Wilton Water Works is a small system (501 to 3,300 people). Hillsborough County has 279 active public water systems. Its population served is about 48% above the county average of 1,206 people per system, and accounts for 0.5% of the 336,507 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 Wilton 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 Wilton Water Works?
EPA lists Wilton 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. 36 of the 279 active systems in Hillsborough County (13%) are also owned by a local government.
Does Wilton Water Works have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 1995. The violations listed here began between January 1995 and January 1995. By type: 12 monitoring and reporting. The contaminants or rules involved are Styrene, Ethylbenzene, o-Dichlorobenzene and p-Dichlorobenzene. EPA lists 12 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 |
|---|---|---|---|---|
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Styrenecode 2996 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Ethylbenzenecode 2992 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | o-Dichlorobenzenecode 2968 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | p-Dichlorobenzenecode 2969 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Vinyl chloridecode 2976 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | trans-1,2-Dichloroethylenecode 2979 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloroethanecode 2980 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,1-Trichloroethanecode 2981 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloropropanecode 2983 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlorobenzenecode 2989 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toluenecode 2991 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
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.
Wilton Water Works: frequently asked questions
Who runs Wilton Water Works?
Wilton Water Works (PWSID NH2521010) is a community water system owned by a local government. It is regulated by the NH state drinking water program.
How many people does Wilton Water Works serve?
Wilton Water Works reports serving 1,790 people through 716 service connections in Hillsborough County, New Hampshire.
Where does Wilton 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 Wilton Water Works have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 1995. 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 Wilton 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. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 1995. For current results, consult the system's annual water quality report, EPA ECHO, or the NH state drinking water program.
Where can I find Wilton Water Works' water quality report?
As a community water system, Wilton 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 Hillsborough County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Manchester Water Works | Hillsborough | 123,500 | Community | Surface water |
| Pennichuck Water Works | Hillsborough | 88,853 | Community | Surface water |
| Merrimack Village Dist | Hillsborough | 25,500 | Community | Groundwater |
| Hudson Water Dept | Hillsborough | 16,700 | Community | Groundwater |
| Milford Water Utilities Dept | Hillsborough | 9,500 | Community | Purchased surface water |
| Litchfield | Hillsborough | 6,920 | Community | Purchased 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, “Wilton Water Works, PWSID NH2521010, New Hampshire”, https://aquacensus.com/water-systems/new-hampshire/wilton-water-works-nh2521010 (data as of October 1, 2026).