Public water system · NH2545100
ActiveWindham High Sch
At a glance
Windham High Sch (PWSID NH2545100) is an active non-transient non-community water system in Rockingham County, New Hampshire. It reports serving 1,110 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in October 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,110
Service connections
1
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Windham High Sch compare with other water systems in Rockingham County?
By EPA's size categories, Windham High Sch is a small system (501 to 3,300 people). Rockingham County has 554 active public water systems. Its population served is about 125% above the county average of 492 people per system, and accounts for 0.4% 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 non-transient non-community water system reports serving 430 people, so Windham High Sch is about 158% above that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. New Hampshire has 453 active non-transient non-community water systems, 18% 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 Windham High Sch?
EPA lists Windham High Sch 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. 70 of the 554 active systems in Rockingham County (13%) are also owned by a local government.
Does Windham High Sch have drinking water violations?
EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in October 2025. The violations listed here began between July 2010 and October 2025. By type: 3 monitoring and reporting, 1 required treatment not met, 1 monitoring and 1 reporting. The contaminant or rule involved most often is Lead and Copper Rule (2 of them). EPA lists 6 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 |
|---|---|---|---|---|
| 2025-10-05 | Required treatment not metOCCT/SOWT Treatment Installation/Demonstration · code 58 | Lead and Copper Rulecode 5000 | Yes | Resolved |
| 2025-01-11 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2019-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2018-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2018-08-01 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2010-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 6 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.
Windham High Sch: frequently asked questions
Who runs Windham High Sch?
Windham High Sch (PWSID NH2545100) is a non-transient non-community water system owned by a local government. It is regulated by the NH state drinking water program.
How many people does Windham High Sch serve?
Windham High Sch reports serving 1,110 people through 1 service connection in Rockingham County, New Hampshire.
Where does Windham High Sch 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 Windham High Sch have any drinking water violations?
EPA's records list 6 violations for this system; 1 is health-based, and the most recent began in October 2025. 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 Windham High Sch'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 6 violations for this system; 1 is health-based, and the most recent began in October 2025. For current results, consult EPA ECHO, or the NH state drinking water program.
Where can I find Windham High Sch's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Windham High Sch is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
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, “Windham High Sch, PWSID NH2545100, New Hampshire”, https://aquacensus.com/water-systems/new-hampshire/windham-high-sch-nh2545100 (data as of October 1, 2026).