EPA EXPORT · 13 SEP 2026FEDERAL COMPLIANCE RECORDS · NOT A HOME WATER TEST
TAP WATERLEDGERPublic system compliance records

COUNTY WATER-SYSTEM LEDGER

Montgomery, Maryland

Compare active community water systems serving this county in EPA's public export. Systems can serve multiple places, so population totals may overlap.

Systems3active CWS · pop. 2,500+
Population served1,958,005reported total; may overlap
Current violation flag0.0%0 systems
Serious-violator flag0.0%0 systems

01 / SYSTEMS

Water systems serving Montgomery

Ordered by reported population served. Open any record for separate health, monitoring, notice, other, and serious-violator flags.

Water systemPopulation servedPrimary sourceCurrent export status
Washington Suburban Sanitary CommissionMD01500051,900,000Surface waterNo current violation flagged
City Of RockvilleMD015000352,000Surface waterNo current violation flagged
Town Of PoolesvilleMD01500026,005Groundwater under influence of surface waterNo current violation flagged

02 / SOURCE MIX

Surface water2 systems · 1,952,000 served
Groundwater under influence of surface water1 systems · 6,005 served
How to read the population total

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.