State
Wyoming: drinking water records
EPA lists 327 community water systems serving homes in Wyoming. 32 took part in EPA's national PFAS survey (UCMR 5), and 4 found at least one PFAS above the level laboratories can measure.
Data as of EPA UCMR 5 final release, August 2026 (file dated Aug 28, 2026) · EPA SDWIS 2026Q2 (file dated Jul 9, 2026). How we build these pages
PFAS in EPA’s final survey
4 of the 32 Wyoming systems in EPA’s national PFAS survey found at least one PFAS, and 0 had a PFOA or PFOS yearly average at or above EPA’s limit. See Wyoming’s PFAS results by system and compound.
Counties
- Albany County 10 systems
- Big Horn County 15 systems
- Campbell County 45 systems
- Carbon County 11 systems
- Converse County 8 systems
- Crook County 7 systems
- Fremont County 21 systems
- Goshen County 10 systems
- Hot Springs County 7 systems
- Johnson County 4 systems
- Laramie County 19 systems
- Lincoln County 28 systems
- Natrona County 25 systems
- Niobrara County 3 systems
- Park County 11 systems
- Platte County 6 systems
- Sheridan County 6 systems
- Sublette County 5 systems
- Sweetwater County 26 systems
- Teton County 37 systems
- Uinta County 6 systems
- Washakie County 4 systems
- Weston County 9 systems
ZIP reports
Sources
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. Database prepared 2026-09-03.