Public water system · MD1121360
ActiveDarlington Library
At a glance
Darlington Library (PWSID MD1121360) is an active transient non-community water system in Harford County, Maryland. It reports serving 41 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list one violation for this system; it is not health-based, and the most recent began in January 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
41
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Darlington Library compare with other water systems in Harford County?
By EPA's size categories, Darlington Library is a very small system (500 people or fewer). Harford County has 226 active public water systems. Its population served is well below the county average of 956 people per system, and accounts for less than 0.1% of the 215,993 people reported by systems filed under the county. Across Maryland, the 2,992 active systems average 1,947 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Darlington Library 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. Maryland has 2,079 active transient non-community water systems, 69% of the state's 2,992 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,870 Maryland systems (96%) list groundwater as their primary source.
Who owns and regulates Darlington Library?
EPA lists Darlington Library as owned by a local government. The MD state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 45 of the 226 active systems in Harford County (20%) are also owned by a local government.
Does Darlington Library have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in January 2022. By type: 1 monitoring and reporting. The contaminant or rule involved is Nitrate. 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 |
|---|---|---|---|---|
| 2022-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | 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.
Darlington Library: frequently asked questions
Who runs Darlington Library?
Darlington Library (PWSID MD1121360) is a transient non-community water system owned by a local government. It is regulated by the MD state drinking water program.
How many people does Darlington Library serve?
Darlington Library reports serving 41 people through 1 service connection in Harford County, Maryland.
Where does Darlington Library 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 Darlington Library have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in January 2022. 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 Darlington Library'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 not health-based, and the most recent began in January 2022. For current results, consult EPA ECHO, or the MD state drinking water program.
Where can I find Darlington Library's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Darlington Library 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 Harford County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Harford County D.P.W. | Harford | 104,567 | Community | Surface water |
| City of Aberdeen | Harford | 18,006 | Community | Purchased surface water |
| Chapel Hill - Aberdeen Proving Grounds | Harford | 15,000 | Community | Groundwater |
| City of Havre De Grace | Harford | 14,000 | Community | Surface water |
| Maryland American Water Company | Harford | 13,200 | Community | Surface water |
| Harford Community College - Main Campus | Harford | 2,500 | Non-transient non-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, “Darlington Library, PWSID MD1121360, Maryland”, https://aquacensus.com/water-systems/maryland/darlington-library-md1121360 (data as of October 1, 2026).