State
Maryland: drinking water records
EPA lists 483 community water systems serving homes in Maryland. 78 took part in EPA's national PFAS survey (UCMR 5), and 26 found at least one PFAS above the level laboratories can measure.
In focus483community water systems
Public records. Clearer context.
0
ZIP reports published
483
community water systems
153
systems with a health-based violation since 2016
24
systems that reached the lead action level since 2016
Counties
- Allegany County 18 systems
- Anne Arundel County 27 systems
- Baltimore County 13 systems
- Baltimore city 4 systems
- Calvert County 29 systems
- Caroline County 17 systems
- Carroll County 23 systems
- Cecil County 32 systems
- Charles County 50 systems
- Dorchester County 19 systems
- Frederick County 30 systems
- Garrett County 16 systems
- Harford County 16 systems
- Howard County 4 systems
- Kent County 14 systems
- Montgomery County 5 systems
- Prince George's County 4 systems
- Queen Anne's County 16 systems
- Somerset County 12 systems
- St. Mary's County 37 systems
- Talbot County 8 systems
- Washington County 18 systems
- Wicomico County 22 systems
- Worcester County 19 systems
ZIP reports
Sources
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.