Public water system · NH0768160
Active337 Calef Highway
At a glance
337 Calef Highway (PWSID NH0768160) is an active transient non-community water system in Rockingham County, New Hampshire. It reports serving 50 people through 2 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
50
Service connections
2
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does 337 Calef Highway compare with other water systems in Rockingham County?
By EPA's size categories, 337 Calef Highway 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 transient non-community water system reports serving 144 people, so 337 Calef Highway is about 65% below that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. New Hampshire has 1,291 active transient non-community water systems, 53% 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 337 Calef Highway?
EPA lists 337 Calef Highway 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 337 Calef Highway have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for 337 Calef Highway. For the latest compliance status, check EPA ECHO for current compliance history.
337 Calef Highway: frequently asked questions
Who runs 337 Calef Highway?
337 Calef Highway (PWSID NH0768160) is a transient non-community water system privately owned. It is regulated by the NH state drinking water program.
How many people does 337 Calef Highway serve?
337 Calef Highway reports serving 50 people through 2 service connections in Rockingham County, New Hampshire.
Where does 337 Calef Highway 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 337 Calef Highway have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is 337 Calef Highway'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 Safe Drinking Water Act records list no violations for this system. For current results, consult EPA ECHO, or the NH state drinking water program.
Where can I find 337 Calef Highway's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. 337 Calef Highway is a 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, “337 Calef Highway, PWSID NH0768160, New Hampshire”, https://aquacensus.com/water-systems/new-hampshire/337-calef-highway-nh0768160 (data as of October 1, 2026).