County · Wyoming
Natrona County, Wyoming: drinking water records
This overview covers 12 ZIP codes and 21 community water systems in Natrona County. It also stands in for 5 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Mills, City of WY5600036 | 4,050 | 120 | 0 | 3 | 0 ppb |
| Casper, City of WY5601415 | 59,000 | 240 | 0 | 0 | 1 ppb |
| Bar Nunn, Town of WY5600067 | 4,000 | 120 | 0 | 0 | 1 ppb |
| Natrona County Int'L Airport WY5600079 | 423 | 0 | 0 | 1 | 0 ppb |
| Countryside Court WY5600756 | 125 | 0 | 0 | 2 | 1 ppb |
| Mile-Hi I&s District WY5601645 | 48 | 0 | 0 | 1 | 3 ppb |
| Broken Wrench LLC WY5600074 | 30 | 0 | 0 | 7 | 2 ppb |
| Evansville, Town of WY5600018 | 2,873 | 0 | 0 | 0 | 2 ppb |
| Vista West Water Company WY5600069 | 1,600 | 0 | 0 | 0 | 2 ppb |
| Pioneer Water & Sewer District WY5600828 | 1,500 | 0 | 0 | 0 | 2 ppb |
| Riverside Mobile Home Court WY5601641 | 330 | 0 | 0 | 0 | 0 ppb |
| Midwest, Town of WY5600201 | 325 | 0 | 0 | 0 | 2 ppb |
| Air Base Acres I&s District WY5600080 | 236 | 0 | 0 | 0 | 0 ppb |
| Poison Spider I&s District WY5600073 | 200 | 0 | 0 | 0 | 0 ppb |
| Edgerton, Town of WY5600017 | 195 | 0 | 0 | 0 | 1 ppb |
| Sandy Lake Estates I&s District WY5601581 | 150 | 0 | 0 | 0 | 0 ppb |
| Pleasant View Water Company WY5600082 | 130 | 0 | 0 | 0 | 1 ppb |
| South Riverside Acres Wtr Impr Dist WY5601072 | 125 | 0 | 0 | 0 | 1 ppb |
| Thirty-Three Mile Road I&s District WY5601579 | 100 | 0 | 0 | 0 | 1 ppb |
| Lakeview I&s District WY5601494 | 62 | 0 | 0 | 0 | 2 ppb |
| Central Wy Regional Water System Jpb WY5600009 | 25 | 0 | 0 | 0 | 0 ppb |
ZIP reports in Natrona County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 82620, 82630, 82638, 82646, 82648.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.