Public water system · MD0120003
ActiveMaryland American Water Company
At a glance
Maryland American Water Company (PWSID MD0120003) is an active community water system in Harford County, Maryland. It reports serving 13,200 people through 4,745 service connections. Its primary water source is surface water, and EPA lists it as privately owned. EPA's records list one violation for this system; it is health-based, and the most recent began in October 1994.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
13,200
Service connections
4,745
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Maryland American Water Company compare with other water systems in Harford County?
By EPA's size categories, Maryland American Water Company is a large system (10,001 to 100,000 people). Harford County has 226 active public water systems, and Maryland American Water Company is the 5th-largest of them by population served. Its population served is about 14 times the county average of 956 people per system, and accounts for 6.1% 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 community water system reports serving 6,703 people, so Maryland American Water Company is about twice 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 31 Maryland systems (1%) list surface water as their primary source.
Who owns and regulates Maryland American Water Company?
EPA lists Maryland American Water Company as privately owned. 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. 176 of the 226 active systems in Harford County (78%) are also privately owned.
Does Maryland American Water Company have drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in October 1994. By type: 1 contaminant level above the legal limit. The contaminant or rule involved is Fluoride. 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 |
|---|---|---|---|---|
| 1994-10-16 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Fluoridecode 1025 | Yes | 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.
Maryland American Water Company: frequently asked questions
Who runs Maryland American Water Company?
Maryland American Water Company (PWSID MD0120003) is a community water system privately owned. It is regulated by the MD state drinking water program.
How many people does Maryland American Water Company serve?
Maryland American Water Company reports serving 13,200 people through 4,745 service connections in Harford County, Maryland.
Where does Maryland American Water Company get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Maryland American Water Company have any drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in October 1994. 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 Maryland American Water Company'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 health-based, and the most recent began in October 1994. For current results, consult the system's annual water quality report, EPA ECHO, or the MD state drinking water program.
Where can I find Maryland American Water Company's water quality report?
As a community water system, Maryland American Water Company 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 |
| Chapel Hill - Aberdeen Proving Grounds | Harford | 15,000 | Community | Groundwater |
| City of Havre De Grace | Harford | 14,000 | 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 |
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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, “Maryland American Water Company, PWSID MD0120003, Maryland”, https://aquacensus.com/water-systems/maryland/maryland-american-water-company-md0120003 (data as of October 1, 2026).