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

COUNTY WATER-SYSTEM LEDGER

DuPage, Illinois

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

Systems32active CWS · pop. 2,500+
Population served834,595reported total; may overlap
Current violation flag21.9%7 systems
Serious-violator flag0.0%0 systems

01 / SYSTEMS

Water systems serving DuPage

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

Water systemPopulation servedPrimary sourceCurrent export status
NapervilleIL0434670156,406Surface water purchasedNo current violation flagged
WheatonIL043105053,970Surface water purchasedNo current violation flagged
Downers GroveIL043030049,425Surface water purchasedNo current violation flagged
ElmhurstIL043035045,000Surface water purchasedNo current violation flagged
LombardIL043060044,476Surface water purchasedCurrent monitoring/reporting flag
Carol StreamIL043020039,854Surface water purchasedNo current violation flagged
AddisonIL043005038,017Surface water purchasedNo current violation flagged
WoodridgeIL043125033,566Surface water purchasedOther current violation flag
Glendale HeightsIL043040033,176Surface water purchasedNo current violation flagged
Glen EllynIL043045028,850Surface water purchasedOther current violation flag
West ChicagoIL043090025,166Ground waterNo current violation flagged
LisleIL043055124,223Surface water purchasedOther current violation flag
WestmontIL043095024,161Surface water purchasedNo current violation flagged
RoselleIL043482022,897Surface water purchasedNo current violation flagged
Villa ParkIL043080022,263Surface water purchasedNo current violation flagged
BloomingdaleIL043010022,018Surface water purchasedOther current violation flag
DarienIL043027021,751Surface water purchasedNo current violation flagged
BensenvilleIL043414018,537Surface water purchasedNo current violation flagged
HinsdaleIL043452017,900Surface water purchasedNo current violation flagged
Wood DaleIL043120014,012Surface water purchasedOther current violation flag
WarrenvilleIL043083312,350Ground waterNo current violation flagged
Burr RidgeIL043419011,192Surface water purchasedNo current violation flagged
WinfieldIL04311509,835Surface water purchasedNo current violation flagged
ItascaIL04305009,506Surface water purchasedNo current violation flagged
Oak BrookIL04307009,400Surface water purchasedNo current violation flagged
WillowbrookIL04311009,000Surface water purchasedCurrent monitoring/reporting flag
Clarendon HillsIL04302508,702Surface water purchasedNo current violation flagged
Southeast Regional Water FacilityIL04300606,940Surface water purchasedNo current violation flagged
Il American-Valley ViewIL04373506,721Surface water purchasedNo current violation flagged
Il American-Dupage UtilityIL04305526,613Surface water purchasedNo current violation flagged
Aqua Illinois-Oak BrookIL04300555,361Surface water purchasedNo current violation flagged
Il American-Liberty Ridge WestIL04356503,307Surface water purchasedNo current violation flagged

02 / SOURCE MIX

Surface water purchased30 systems · 797,079 served
Ground water2 systems · 37,516 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.