Public water system · NH0775020
ActiveEpsom Medical Center
At a glance
Epsom Medical Center (PWSID NH0775020) is an active non-transient non-community water system in Merrimack County, New Hampshire. It reports serving 100 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 7 are health-based, and the most recent began in March 2026.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
100
Service connections
1
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Epsom Medical Center compare with other water systems in Merrimack County?
By EPA's size categories, Epsom Medical Center is a very small system (500 people or fewer). Merrimack County has 244 active public water systems. Its population served is well below the county average of 509 people per system, and accounts for less than 0.1% 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 non-transient non-community water system reports serving 430 people, so Epsom Medical Center is well below 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 Epsom Medical Center?
EPA lists Epsom Medical Center 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. 194 of the 244 active systems in Merrimack County (80%) are also privately owned.
Does Epsom Medical Center have drinking water violations?
Of the 12 most recent violations in EPA's records, 7 are health-based, and the most recent began in March 2026. The violations listed here began between January 2018 and March 2026. By type: 7 contaminant level above the legal limit, 4 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Arsenic (7 of them). EPA lists 11 as resolved and 1 as unaddressed. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2026-03-31 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Unaddressed |
| 2026-02-23 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2026-01-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2022-07-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2019-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2019-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2019-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2019-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2018-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2018-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2018-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Arseniccode 1005 | Yes | Resolved |
| 2018-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | 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.
Epsom Medical Center: frequently asked questions
Who runs Epsom Medical Center?
Epsom Medical Center (PWSID NH0775020) is a non-transient non-community water system privately owned. It is regulated by the NH state drinking water program.
How many people does Epsom Medical Center serve?
Epsom Medical Center reports serving 100 people through 1 service connection in Merrimack County, New Hampshire.
Where does Epsom Medical Center 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 Epsom Medical Center have any drinking water violations?
Of the 12 most recent violations in EPA's records, 7 are health-based, and the most recent began in March 2026. 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 Epsom Medical Center'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. Of the 12 most recent violations in EPA's records, 7 are health-based, and the most recent began in March 2026. For current results, consult EPA ECHO, or the NH state drinking water program.
Where can I find Epsom Medical Center's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Epsom Medical Center 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 Merrimack County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Concord Water Dept | Merrimack | 44,215 | Community | Surface water |
| 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 |
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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, “Epsom Medical Center, PWSID NH0775020, New Hampshire”, https://aquacensus.com/water-systems/new-hampshire/epsom-medical-center-nh0775020 (data as of October 1, 2026).