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

COUNTY WATER-SYSTEM LEDGER

Sonoma, California

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

Systems16active CWS · pop. 2,500+
Population served412,436reported total; may overlap
Current violation flag12.5%2 systems
Serious-violator flag0.0%0 systems

01 / SYSTEMS

Water systems serving Sonoma

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

Water systemPopulation servedPrimary sourceCurrent export status
Santa Rosa, City OfCA4910009175,396Ground waterNo current violation flagged
Petaluma, City OfCA491000660,781Ground waterNo current violation flagged
Rohnert Park, City OfCA491001443,821Ground waterNo current violation flagged
Windsor, Town OfCA491001725,561Ground waterNo current violation flagged
Valley Of The Moon Water DistrictCA491001323,107Ground waterNo current violation flagged
Sonoma, City OfCA491001211,725Ground waterCurrent monitoring/reporting flag
Sonoma State UniversityCA491002710,986Ground waterNo current violation flagged
Healdsburg, City OfCA491000510,985Groundwater under influence of surface waterNo current violation flagged
Cloverdale, City OfCA491000210,398Groundwater under influence of surface waterCurrent monitoring/reporting flag
California-American Larkfield (Puc)CA49100237,913Ground waterNo current violation flagged
Sebastopol, City OfCA49100117,522Ground waterNo current violation flagged
Cotati, City OfCA49100167,303Ground waterNo current violation flagged
Sweetwater Springs Cwd - GuernevilleCA49100046,000Ground waterNo current violation flagged
Russian River County Water DistrictCA49100084,150Ground waterNo current violation flagged
Forestville Water DistrictCA49100193,788Ground water purchasedNo current violation flagged
Sweetwater Springs Cwd - Monte RioCA49100283,000Ground waterNo current violation flagged

02 / SOURCE MIX

Ground water13 systems · 387,265 served
Groundwater under influence of surface water2 systems · 21,383 served
Ground water purchased1 systems · 3,788 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.