Bolthole Index county-legal census · checked 2026-08-08
Septic permitting in Ohio is mixed: 69 counties use county health departments, 0 go through a state agency, and 19 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 → Full Ohio profile →
88 counties · mixed — varies by county · permit status scouted for 22
Adams County Health Department (West Union, OH)
Adams County Health Department - Septic Program ↗Allen County Public Health (Allen County General Health District)
Allen County Public Health - Household Sewage Treatment ↗Ashland County Health Department
Ashland County Health Department - Sewage Treatment Systems ↗Ashtabula County Health Department (Home Sewage Treatment System / HSTS program)
Ashtabula County - HSTS (Home Sewage Treatment System) ↗Athens City-County Health Department (Environmental / Sewage Treatment Systems)
Athens City-County Health Department — Sewage Treatment Systems ↗Auglaize County Health Department
Auglaize County Health Department - New Home Construction ↗Belmont County Health Department - Environmental Health
Belmont County Health Department - Sewage Treatment Systems ↗Brown County Health Department, Environmental Health Division
Brown County Health Department ↗Butler County General Health District (Environmental Health & Plumbing Services)
Butler County Board of Health - Environmental Health ↗Carroll County General Health District - Environmental Health Division
Carroll County General Health District - Wastewater Treatment ↗Champaign Health District
Champaign Health District - Household Sewage Treatment Systems ↗Clark County Combined Health District
Clark County Combined Health District - Sewage & Septic Systems ↗Clermont County Public Health (Clermont County General Health District, Board of Health)
Clermont County Public Health - Septic Systems ↗Clinton County Health District
Clinton County Health District - Sewage Treatment Systems ↗Columbiana County General Health District
Columbiana County General Health District - Sewage ↗Coshocton County Health Department
Coshocton County Health Department - Private Sewage ↗Crawford County Public Health (local health district)
Ohio Department of Health - Sewage Treatment Systems ↗Cuyahoga County Board of Health
Cuyahoga County Board of Health - Household Sewage ↗Darke County General Health District (Health Department)
Darke County General Health District - Building Site Application ↗Defiance County General Health District (Board of Health, Environmental Health)
Defiance County General Health District - Septic O&M ↗Delaware Public Health District (general health district under Ohio Dept of Health)
Delaware Public Health District - Sewage ↗Erie County Health Department (Erie County General Health District)
Erie County Health Department - Sewage Treatment ↗Fairfield County Health Department, Environmental Division
Fairfield County Health Department - Sewage Treatment Systems ↗Fayette County Public Health
Fayette County Public Health - Environmental Health ↗Franklin County Public Health
Franklin County Public Health - Forms & Permits ↗Fulton County Health Department (Environmental Health)
Fulton County Health Department - HSTS/Sewage ↗Gallia County Health Department (Board of Health)
Gallia County Health Department - Sewage ↗Geauga Public Health (Geauga County General Health District)
Geauga Public Health ↗Greene County Public Health (Health District), Environmental Health
Greene County Public Health, Environmental Health ↗Cambridge-Guernsey County Health Department (Combined Health District)
Cambridge-Guernsey County Health Department STS Guidance ↗Hamilton County Public Health (General Health District)
Hamilton County Public Health - Sewage Treatment Systems ↗Hancock County Health Department (Hancock County General Health District)
Hancock County Health Department - Sewage ↗Kenton-Hardin Health Department (under Ohio Department of Health)
Kenton-Hardin Health Department - Household Sewage Treatment ↗Harrison County General Health District
Harrison County Health Department (Sewage) ↗Henry County General Health District
Henry County Health Department - Sewage Management ↗Highland County Health Department, Environmental Health (general health district under Ohio Department of Health)
Highland County Health Department - Household Sewage Systems ↗Hocking County Health Department
Hocking County Health Department - Building Permits ↗Holmes County General Health District (under Ohio DoH OAC 3701-29)
Holmes County General Health District - Sewage ↗Huron County Public Health - Environmental Health Division
Huron County Public Health - Sewage Program ↗Jackson County Health Department (local health district)
Jackson County Health Department (Ohio) — Household Sewage Treatment Systems ↗Jefferson County General Health District, Environmental Division
Jefferson County General Health District - Wells & Septic ↗Knox Public Health (Knox County Health Department) Environmental Health
Knox Public Health - Sewage ↗Lake County General Health District (LCGHD)
Lake County General Health District ↗Lawrence County Health Department (Environmental Services)
Lawrence County Health Department - Environmental Services ↗Licking County Health Department - Sewage Treatment Program (general health district under Ohio Dept. of Health)
Licking County Health Dept - Sewage Treatment Program ↗Logan County Health District (under Ohio DoH, ORC 3718 / OAC 3701-29)
Logan County Health District - Private Sewage Systems ↗Lorain County Public Health (Lorain County General Health District)
Lorain County Public Health - Household Sewage Treatment Systems ↗Toledo-Lucas County Health Department - Household Sewage Treatment System program
Toledo-Lucas County Health Department - Household Sewage Treatment System ↗Madison County Public Health - Environmental Health
Madison County Public Health - Septic and Sewage Systems ↗Mahoning County Public Health (District Board of Health)
Mahoning County Public Health - Septic ↗Marion Public Health (general health district)
Marion Public Health - Household Sewage Treatment Systems ↗Medina County Health Department (Environmental Division)
Medina County Health Department - Sewage Treatment Systems ↗Meigs County Health Department (Environmental Division)
Meigs County Health Department - Home Sewage ↗Mercer County Health District
Mercer County Ohio Health District - Household Sewage Treatment Systems ↗Miami County Public Health
Miami County Public Health ↗Monroe County Health Department (Sewage Treatment System Program)
Monroe County, OH - Health Department Environmental Services ↗Public Health - Dayton & Montgomery County
Public Health - Dayton & Montgomery County - Sewage Treatment Systems ↗Morgan County Health Department
Morgan County Engineer — Development ↗Morrow County Health District, Environmental Health (Ohio general health district)
Morrow County Health District - Sewage ↗Zanesville-Muskingum County Health Department - Sewage Treatment Systems
Zanesville-Muskingum County Health Department - Sewage Treatment Systems ↗Cambridge-Guernsey County Health Department (STS program for Noble County)
Noble County Health Department — Sewage ↗Ottawa County Health Department (Environmental Health)
Ottawa County Health Department - Environmental Applications ↗Paulding County Health Department - Environmental Health (under Ohio Department of Health)
Paulding County Health Department - Sewage Treatment Systems ↗Perry County Health Department (General Health District)
Perry County Health Department - Sewage Programs ↗Pickaway County Public Health
Pickaway County Public Health - Sewage Systems ↗Pike County General Health District
Pike County General Health District - Sewage ↗Portage County Health District (Ohio Dept of Health, ORC 3718)
Portage County Health District - Waste Water (Sewage Disposal) ↗Preble County Public Health (General Health District) - Environmental Health
Preble County Public Health - Sewage Treatment Systems ↗Putnam County Health Department, Environmental Health Division
Putnam County OH Health Department New Home Construction ↗Richland Public Health (Sewage Treatment Systems Program)
Richland Public Health - Sewage Treatment Systems ↗Ross County Health District (Environmental Division)
Ross County Health District - Household Sewage Treatment System Program ↗Sandusky County Health Department (Environmental Health Division)
Sandusky County Health Department - Environmental Health ↗Scioto County Health Department / Board of Health
Scioto County Health Department - Sewage Treatment Systems ↗Seneca County General Health District (Environmental Health Division)
Seneca County General Health District - Home Sewage Treatment Systems ↗Sidney-Shelby County Health Department (general health district)
Sidney-Shelby County Health Department - Sewage Treatment Systems ↗Stark County Combined General Health District (Public Health) - Environmental Health
Stark County Health Department Sewage Treatment Systems ↗Summit County Public Health - Water Quality (Household Sewage Treatment System program)
Summit County Public Health - Sewage Treatment Systems ↗Trumbull County Combined Health District
Trumbull County Health Department - Residential Home Sewage Program ↗Tuscarawas County Health Department
Tuscarawas County Health Department - Water Quality Program (Well and Septic) ↗Union County Health Department (under Ohio DoH, ORC 3718 / OAC 3701-29)
Union County Health Department - Septic Systems ↗Van Wert County General Health District
Van Wert County General Health District - Household Sewage Treatment Systems ↗Vinton County Health Department
Vinton County Health Department - Sewage Systems ↗Warren County Health District - Environmental Health (under Ohio Dept of Health / OAC 3701-29)
Warren County Health District - Sewage Treatment Systems ↗Washington County Health Department (Environmental Health)
Washington County Health Department - Sewage Program ↗Wayne County Health Department, Environmental Health Unit
Wayne County Health Department - Sewage Treatment Systems ↗Williams County Combined Health Department (Environmental Health)
Williams County Health Department - Septic ↗Wood County Health Department
Wood County Health Department, Sewage Treatment Systems ↗Wyandot County Public Health
Wyandot County Public Health - Home Sewage Treatment ↗Every county here has a full profile — its index score, water, land prices, and the rest of its building rules. See the Ohio state page for all counties ranked, or the national septic guide.
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.
