Groundwater Rule (GWR) violations in Maryland
5 active public water systems in Maryland had a Groundwater Rule (GWR) violation in the past three years, 5 of them in the latest quarter of EPA's data. What Groundwater Rule (GWR) is and why it matters.
Systems with a Groundwater Rule (GWR) violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Baden Elementary Prince George's County |
300 | 3 | 2 | |
|
Concord Estates Mobile Home Park Frederick County |
150 | 1 | 1 | |
|
Tranquility at Fredericktowne Frederick County |
105 | 4 | 1 | |
|
Tebbston on Magothy Anne Arundel County |
52 | 5 | 4 | |
|
William Schmidt Outdoor Center Prince George's County |
50 | 1 | 1 |
About this data
A system is counted once if any of its violations in the past three years involved Groundwater Rule (GWR), including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Groundwater Rule (GWR) alone.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Maryland records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.