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

COUNTY WATER-SYSTEM LEDGER

Natrona, Wyoming

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

Systems4active CWS · pop. 2,500+
Population served69,923reported total; may overlap
Current violation flag0.0%0 systems
Serious-violator flag0.0%0 systems

01 / SYSTEMS

Water systems serving Natrona

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

Water systemPopulation servedPrimary sourceCurrent export status
Casper, City OfWY560141559,000Surface water purchasedNo current violation flagged
Mills, City OfWY56000364,050Groundwater under influence of surface waterNo current violation flagged
Bar Nunn, Town OfWY56000674,000Surface water purchasedNo current violation flagged
Evansville, Town OfWY56000182,873Surface waterNo current violation flagged

02 / SOURCE MIX

Surface water purchased2 systems · 63,000 served
Groundwater under influence of surface water1 systems · 4,050 served
Surface water1 systems · 2,873 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.