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

COUNTY WATER-SYSTEM LEDGER

DeKalb, Illinois

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

Systems6active CWS · pop. 2,500+
Population served82,142reported total; may overlap
Current violation flag16.7%1 systems
Serious-violator flag0.0%0 systems

01 / SYSTEMS

Water systems serving DeKalb

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

Water systemPopulation servedPrimary sourceCurrent export status
DekalbIL037010040,290Ground waterNo current violation flagged
SycamoreIL037055018,500Ground waterNo current violation flagged
SandwichIL03748507,156Ground waterCurrent monitoring/reporting flag
Northern Illinois University-DekalbIL03755006,500Ground water purchasedNo current violation flagged
GenoaIL03701505,298Ground waterNo current violation flagged
CortlandIL03700514,398Ground waterNo current violation flagged

02 / SOURCE MIX

Ground water5 systems · 75,642 served
Ground water purchased1 systems · 6,500 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.