Public water system · NH0159050
ActiveGranite Dental Group
At a glance
Granite Dental Group (PWSID NH0159050) is an active transient non-community water system in Strafford County, New Hampshire. It reports serving 46 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list one violation for this system; it is health-based, and the most recent began in July 2011.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
46
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Granite Dental Group compare with other water systems in Strafford County?
By EPA's size categories, Granite Dental Group is a very small system (500 people or fewer). Strafford County has 131 active public water systems. Its population served is well below the county average of 825 people per system, and accounts for less than 0.1% of the 108,010 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 Granite Dental Group is well 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 Granite Dental Group?
EPA lists Granite Dental Group 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. 108 of the 131 active systems in Strafford County (82%) are also privately owned.
Does Granite Dental Group have drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in July 2011. By type: 1 contaminant level above the legal limit. The contaminant or rule involved is Total coliform bacteria (TCR). 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 |
|---|---|---|---|---|
| 2011-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | 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.
Granite Dental Group: frequently asked questions
Who runs Granite Dental Group?
Granite Dental Group (PWSID NH0159050) is a transient non-community water system privately owned. It is regulated by the NH state drinking water program.
How many people does Granite Dental Group serve?
Granite Dental Group reports serving 46 people through 1 service connection in Strafford County, New Hampshire.
Where does Granite Dental Group 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 Granite Dental Group have any drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in July 2011. 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 Granite Dental Group'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 July 2011. For current results, consult EPA ECHO, or the NH state drinking water program.
Where can I find Granite Dental Group's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Granite Dental Group 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 Strafford County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Dover Water Dept | Strafford | 29,000 | Community | Groundwater |
| Rochester Water Dept | Strafford | 25,000 | Community | Surface water |
| Unh/Durham Water Sys | Strafford | 16,000 | Community | Surface water |
| Somersworth Water Works | Strafford | 12,200 | Community | Surface water |
| Farmington Water Dept | Strafford | 3,250 | Community | Groundwater |
| Rollinsford Water Sewer Dist | Strafford | 1,688 | 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, “Granite Dental Group, PWSID NH0159050, New Hampshire”, https://aquacensus.com/water-systems/new-hampshire/granite-dental-group-nh0159050 (data as of October 1, 2026).