Public water system · MD0120002
ActiveChapel Hill - Aberdeen Proving Grounds
At a glance
Chapel Hill - Aberdeen Proving Grounds (PWSID MD0120002) is an active community water system in Harford County, Maryland. It reports serving 15,000 people through 1,712 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 6 violations for this system; none is health-based, and the most recent began in October 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
15,000
Service connections
1,712
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Chapel Hill - Aberdeen Proving Grounds compare with other water systems in Harford County?
By EPA's size categories, Chapel Hill - Aberdeen Proving Grounds is a large system (10,001 to 100,000 people). Harford County has 226 active public water systems, and Chapel Hill - Aberdeen Proving Grounds is the 3rd-largest of them by population served. Its population served is about 16 times the county average of 956 people per system, and accounts for 6.9% 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 community water system reports serving 6,703 people, so Chapel Hill - Aberdeen Proving Grounds is about 124% above that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Maryland has 422 active community water systems, 14% 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 Chapel Hill - Aberdeen Proving Grounds?
EPA lists Chapel Hill - Aberdeen Proving Grounds 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 Chapel Hill - Aberdeen Proving Grounds have drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in October 2020. The violations listed here began between July 2010 and October 2020. By type: 6 monitoring and reporting. The contaminant or rule involved most often is Lead and Copper Rule (2 of them). EPA lists 6 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 |
|---|---|---|---|---|
| 2020-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2017-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2013-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2013-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2010-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2010-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
All 6 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.
Chapel Hill - Aberdeen Proving Grounds: frequently asked questions
Who runs Chapel Hill - Aberdeen Proving Grounds?
Chapel Hill - Aberdeen Proving Grounds (PWSID MD0120002) is a community water system owned by a local government. It is regulated by the MD state drinking water program.
How many people does Chapel Hill - Aberdeen Proving Grounds serve?
Chapel Hill - Aberdeen Proving Grounds reports serving 15,000 people through 1,712 service connections in Harford County, Maryland.
Where does Chapel Hill - Aberdeen Proving Grounds 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 Chapel Hill - Aberdeen Proving Grounds have any drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in October 2020. 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 Chapel Hill - Aberdeen Proving Grounds' 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 6 violations for this system; none is health-based, and the most recent began in October 2020. For current results, consult the system's annual water quality report, EPA ECHO, or the MD state drinking water program.
Where can I find Chapel Hill - Aberdeen Proving Grounds' water quality report?
As a community water system, Chapel Hill - Aberdeen Proving Grounds must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
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 |
| 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 |
| Greenridge Subdivision | Harford | 2,271 | Community | Purchased surface water |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Chapel Hill - Aberdeen Proving Grounds, PWSID MD0120002, Maryland”, https://aquacensus.com/water-systems/maryland/chapel-hill-aberdeen-proving-grounds-md0120002 (data as of October 1, 2026).