Wyoming
Johnson County drinking water quality
13 active public water systems serve 5,523 people in Johnson County. 3 are compliant, 10 had at least one EPA violation in the past three years, 0 are designated serious violators, and 1 carries a health flag.
Needs attention
Community water systems
4 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Buffalo, City of Buffalo |
4,419 | 1 | 0 | |
|
Kaycee, Town of Kaycee |
263 | 1 | 0 | |
|
Bald Mountain Trailer Court Buffalo |
150 | 1 | 1 | |
|
Bighorn Mountain Campground Buffalo |
29 | 1 | 0 |
Non-community systems (9: schools, campgrounds, workplaces, restaurants)
These systems serve places people visit rather than homes.
| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
HF Bar Ranch |
153 | 0 | 0 | |
|
Lake Stop LLC Buffalo |
112 | 1 | 0 | |
|
Paradise Guest Ranch Buffalo |
90 | 1 | 0 | |
|
Fort Phil Kearny ST Hist Site Story |
89 | 2 | 0 | |
|
South Fork Mountain Lodge Buffalo |
76 | 3 | 1 | |
|
Bighorn Nf-Leigh Creek Dump Station |
40 | 0 | 0 | |
|
YMCA of the Big Horns Camp Roberts Buffalo |
40 | 1 | 0 | |
|
Bhnf-Tie Hack CG Buffalo |
35 | 2 | 0 | |
|
WY Dot-Powder River RA Sheridan |
27 | 0 | 0 |
Inactive systems (8, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Wyoming records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.