Bolthole Index county-legal census · checked 2026-10-07
Septic permitting in Wyoming is mixed: 17 counties use county health departments, 4 go through a state agency, and 2 through regional districts.Every entry below names the approving authority for that county, cited to the authority’s own page.
Septic rules change and some cities run their own programs — treat this as a verified starting point, not legal advice. All states → Wyoming water rights & wells → Full Wyoming profile →
23 counties · mixed — varies by county · permit status scouted for 23
Albany County Planning Department (Small Wastewater / Water & Wastewater program, under WY DEQ Water Quality Division framework)
Planning - Wastewater FAQ ↗Big Horn County Land Planning Department (small wastewater systems, delegated under WY DEQ)
Septic Systems ↗Campbell County Public Works (Building, Planning & Zoning) - delegated by Wyoming DEQ
Small Wastewater (Septic) Systems ↗Wyoming Department of Environmental Quality (WY DEQ), Water Quality Division
WY DEQ Small Wastewater Systems ↗Converse County (Minimum Standards Governing Individual Small Wastewater Systems)
Converse County Minimum Standards Governing Small Wastewater Systems ↗Crook County Planning (Growth & Development)
Small Wastewater (Septic Systems 2000 gallons or less per day) ↗Fremont County Planning Department - Small Wastewater program (systems <2,000 gpd; WY DEQ handles larger)
Fremont County - Building Codes & Certificates of Occupancy ↗Goshen County Planning & GIS (small wastewater under DEQ delegation)
Goshen County Land Use Plan ↗Hot Springs County Planning Office
Planner - Hot Springs County Wyoming ↗Johnson County Planning Department (Small Wastewater / Septic Permitting)
Septic System Permitting ↗Laramie County Division of Environmental Health
Wyoming DEQ - Small Wastewater Systems ↗Lincoln County Office of Planning & Development
Planning & Development ↗Casper-Natrona County Health Department, Environmental Health Division
Licensing – Casper-Natrona County Health Department ↗Wyoming Department of Environmental Quality, Water Quality Division
Small Wastewater Systems ↗Park County Planning & Zoning (Small Wastewater Systems Administrator)
Small Wastewater Systems - Park County Wyoming ↗Wyoming Department of Environmental Quality (DEQ), Water Quality Division - Small Wastewater Systems
Platte County - Planning & Zoning FAQs ↗Sheridan County Public Works Department
sheridanwy.gov ↗Sublette County Planning & Zoning Department (delegated by Wyoming DEQ)
Sublette County Planning & Zoning ↗Sweetwater County Environmental Health (District Board of Health)
cms7files.revize.com ↗Teton County Engineering Department (Sanitarian) under WY DEQ Title 9
Teton County - Small Wastewater Facility Permit Portal ↗Uinta County Planning & Zoning (Small Wastewater program)
Wastewater / Septic System ↗Washakie County Planner (Small Wastewater, DEQ-delegated)
Washakie County SWTF Application ↗Wyoming Department of Environmental Quality (DEQ), Small Wastewater Systems
Wyoming DEQ - Small Wastewater Systems ↗Every county here has a full profile — its index score, water, land prices, and the rest of its building rules. See the Wyoming state page for all counties ranked, or the national septic guide.
Off-grid gear
Before the Wyoming septic office sees a parcel, you can test it yourself. What we'd bring:
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General guidance, not legal advice. Off-grid, building, and land-use rules are often set at the county level and change often. Verify with your county and state before acting. Data reviewed 2026-06-26.
