COUNTY WATER-SYSTEM LEDGER
Montgomery, Maryland
EPA’s September 2026 export lists 3 active community water systems serving Montgomery, Maryland, with 0 current-violation flags and 0 serious-violator flags among the covered systems.
Source: EPA SDWIS system-search export · Active community systems serving 2,500+ people · Snapshot 13 Sep 2026
01 / SYSTEMS
Water systems serving Montgomery, Maryland
EPA associates 3 covered systems with Montgomery, Maryland; their reported population-served values total 1,958,005 and may overlap.
Ordered by reported population served. Open any record for separate health, monitoring, notice, other, and serious-violator flags.
| Water system | Population served | Primary source | Current export status |
|---|---|---|---|
| Washington Suburban Sanitary CommissionMD0150005 | 1,900,000 | Surface water | No current violation flagged |
| City Of RockvilleMD0150003 | 52,000 | Surface water | No current violation flagged |
| Town Of PoolesvilleMD0150002 | 6,005 | Groundwater under influence of surface water | No current violation flagged |
02 / SOURCE MIX
Primary water sources for Montgomery, Maryland
EPA classifies 3 systems serving Montgomery, Maryland across 2 primary-source categories; Surface water is the largest category with 2 systems.
It is the sum of each listed system's reported population served, not a census estimate. Service areas can overlap and some systems list multiple cities or counties.