Arsenic violations in Maryland
17 active public water systems in Maryland had a Arsenic violation in the past three years, 1 of them in the latest quarter of EPA's data. What Arsenic is and why it matters.
Systems with a Arsenic violation
Latest quarter first, then largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
White Oak Mobile Home Park Garrett County |
32 | 4 | 1 | |
|
Caroline Acres Mobile Home Park Caroline County |
395 | 4 | 0 | |
|
Bay Country Estates Mobile Home Park Cecil County |
276 | 3 | 0 | |
|
Reeb Millwork (delmarva Sash & Door)1315 Queen Anne's County |
159 | 5 | 0 | |
|
Calvert Co. Industrial Park Calvert County |
158 | 1 | 0 | |
|
Town of Henderson Caroline County |
156 | 4 | 1 | |
|
Mount Pleasant Water Co., Inc. St. Mary's County |
150 | 2 | 0 | |
|
ST Johns Lutheran Church and School Baltimore County |
140 | 4 | 0 | |
|
Barrelville Allegany County |
130 | 7 | 2 | |
|
Lucrezias Childcare Calvert County |
89 | 2 | 0 | |
|
Dawn's Early Light Early Childhood Ctr Calvert County |
81 | 3 | 0 | |
|
Reeb Millwork of Maryland, Inc. 1302 Queen Anne's County |
70 | 4 | 0 | |
|
Stockton Head Start Worcester County |
68 | 3 | 0 | |
|
BB Apartments (prev Woc Village Apts) Worcester County |
40 | 5 | 0 | |
|
Harman Subdivision Caroline County |
35 | 3 | 0 | |
|
Powrmatic Inc. Carroll County |
35 | 4 | 1 | |
|
Calvert Gateway & McDonalds # 16243 Calvert County |
25 | 3 | 0 |
About this data
A system is counted once if any of its violations in the past three years involved Arsenic, including monitoring and reporting lapses. Rules violated and status in the table are for the whole system, not Arsenic 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.