Public water system · NH1197030
ActiveElm Brook Park
At a glance
Elm Brook Park (PWSID NH1197030) is an active transient non-community water system in Merrimack County, New Hampshire. It reports serving 500 people through 7 service connections. Its primary water source is groundwater, and EPA lists it as owned by the federal government. EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in May 2019.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
500
Service connections
7
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Elm Brook Park compare with other water systems in Merrimack County?
By EPA's size categories, Elm Brook Park is a very small system (500 people or fewer). Merrimack County has 244 active public water systems. Its population served is roughly in line with the county average of 509 people per system, and accounts for 0.4% 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 transient non-community water system reports serving 144 people, so Elm Brook Park is about 3.5 times 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 Elm Brook Park?
EPA lists Elm Brook Park as owned by the federal 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. 1 of the 244 active systems in Merrimack County (0.4%) are also owned by the federal government.
Does Elm Brook Park have drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in May 2019. The violations listed here began between May 2019 and May 2019. By type: 1 required treatment not met and 1 reporting. The contaminant or rule involved most often is Revised Total Coliform Rule (2 of them). EPA lists 2 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 |
|---|---|---|---|---|
| 2019-05-01 | Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2019-05-01 | ReportingReport Startup Procedures Cert Form (RTCR) · code 4C | Revised Total Coliform Rulecode 8000 | No | Resolved |
All 2 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.
Elm Brook Park: frequently asked questions
Who runs Elm Brook Park?
Elm Brook Park (PWSID NH1197030) is a transient non-community water system owned by the federal government. It is regulated by the NH state drinking water program.
How many people does Elm Brook Park serve?
Elm Brook Park reports serving 500 people through 7 service connections in Merrimack County, New Hampshire.
Where does Elm Brook Park 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 Elm Brook Park have any drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in May 2019. 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 Elm Brook Park'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 2 violations for this system; 1 is health-based, and the most recent began in May 2019. For current results, consult EPA ECHO, or the NH state drinking water program.
Where can I find Elm Brook Park's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Elm Brook Park 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 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, “Elm Brook Park, PWSID NH1197030, New Hampshire”, https://aquacensus.com/water-systems/new-hampshire/elm-brook-park-nh1197030 (data as of October 1, 2026).