Public water system · NH0269090
Active514 South St
At a glance
514 South St (PWSID NH0269090) is an active transient non-community water system in Merrimack County, New Hampshire. It reports serving 30 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 8 violations for this system; 4 are health-based, and the most recent began in October 2013.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
30
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does 514 South St compare with other water systems in Merrimack County?
By EPA's size categories, 514 South St 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 transient non-community water system reports serving 144 people, so 514 South St 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 514 South St?
EPA lists 514 South St 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 514 South St have drinking water violations?
EPA's records list 8 violations for this system; 4 are health-based, and the most recent began in October 2013. The violations listed here began between October 2008 and October 2013. By type: 4 contaminant level above the legal limit, 2 monitoring and reporting and 2 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (6 of them). EPA lists 8 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 |
|---|---|---|---|---|
| 2013-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2013-10-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2009-12-14 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2009-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2009-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2009-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2009-02-15 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2008-10-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 8 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.
514 South St: frequently asked questions
Who runs 514 South St?
514 South St (PWSID NH0269090) is a transient non-community water system privately owned. It is regulated by the NH state drinking water program.
How many people does 514 South St serve?
514 South St reports serving 30 people through 1 service connection in Merrimack County, New Hampshire.
Where does 514 South St 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 514 South St have any drinking water violations?
EPA's records list 8 violations for this system; 4 are health-based, and the most recent began in October 2013. 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 514 South St'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 8 violations for this system; 4 are health-based, and the most recent began in October 2013. For current results, consult EPA ECHO, or the NH state drinking water program.
Where can I find 514 South St's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. 514 South St 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, “514 South St, PWSID NH0269090, New Hampshire”, https://aquacensus.com/water-systems/new-hampshire/514-south-st-nh0269090 (data as of October 1, 2026).