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Click on any county below to explore septic regulations for that area:

Idaho's septic system regulations are administered by 7 regional health districts, each covering multiple counties. Below you'll find comprehensive information about each district.

Panhandle District

Coverage: 5 Northern Counties

  • Boundary
  • Bonner
  • Kootenai
  • Benewah
  • Shoshone

Headquarters: Coeur d'Alene

Documents Available: 7 PDFs including applications, installer lists, and technical guidance

📁 View All Documents 📄 README

North Central District

Coverage: 5 North-Central Counties

  • Clearwater
  • Idaho
  • Latah
  • Lewis
  • Nez Perce

Headquarters: Lewiston

Documents Available: 24 PDFs including extensive training materials, DIY homeowner resources, and technical specifications

📁 View All Documents 📄 README

Southwest District

Coverage: 7 Western Counties

  • Adams
  • Canyon
  • Gem
  • Owyhee
  • Payette
  • Valley
  • Washington

Headquarters: Caldwell

Documents Available: 7 PDFs with permit applications and district-specific requirements

📁 View All Documents 📄 README

Central District (CDH)

Coverage: 4 Counties (Boise Metro)

  • Ada (Boise)
  • Boise
  • Elmore
  • Valley

Headquarters: Boise

Documents Available: 19 PDFs including county-specific applications, fee schedules, and lawful presence verification requirements

📁 View All Documents 📄 README

South Central District

Coverage: 8 South-Central Counties

  • Blaine
  • Camas
  • Cassia
  • Gooding
  • Jerome
  • Lincoln
  • Minidoka
  • Twin Falls

Headquarters: Twin Falls

Documents Available: 15 PDFs including May 2025 rule changes and gravelless systems guidance

📁 View All Documents 📄 README

Southeastern District

Coverage: 9 Southeastern Counties

  • Bannock (Pocatello)
  • Bear Lake
  • Bingham
  • Butte
  • Caribou
  • Franklin
  • Oneida
  • Power

Headquarters: Pocatello

Documents Available: 17 PDFs with comprehensive permit procedures and technical requirements

📁 View All Documents 📄 README

Eastern Idaho District

Coverage: 6 Eastern Counties

  • Bonneville (Idaho Falls)
  • Clark
  • Custer
  • Fremont
  • Jefferson
  • Lemhi
  • Madison
  • Teton

Headquarters: Idaho Falls

Documents Available: 10 PDFs including October 2025 updates

📁 View All Documents 📄 README

The Idaho Department of Environmental Quality (DEQ) provides statewide oversight and technical guidance applicable across all districts:

  • Technical Guidance Manual (350+ pages) - Authoritative reference for complex systems
  • IDAPA Regulations - Idaho Administrative Code governing septic systems
  • 20 Guidance Memorandums (1993-2021) - Policy interpretations and technical bulletins
  • Approved Products Database - 50+ manufacturers of alternative system components

The Idaho State Tax Commission maintains an interactive portal with GIS parcel map links for all 44 Idaho counties. These maps are essential for property research and understanding parcel boundaries:

👉 State of Idaho County Parcel Maps →

Click on any county to view their official parcel mapping system. Each county maintains its own GIS platform with property boundaries, tax information, and other geographic data.

Use the interactive map above or check this quick reference:

Panhandle: Boundary, Bonner, Kootenai, Benewah, Shoshone

North Central: Clearwater, Idaho, Latah, Lewis, Nez Perce

Southwest: Adams, Canyon, Gem, Owyhee, Payette, Valley, Washington

Central (CDH): Ada, Boise, Elmore, Valley

South Central: Blaine, Camas, Cassia, Gooding, Jerome, Lincoln, Minidoka, Twin Falls

Southeastern: Bannock, Bear Lake, Bingham, Butte, Caribou, Franklin, Oneida, Power

Eastern Idaho: Bonneville, Clark, Custer, Fremont, Jefferson, Lemhi, Madison, Teton

While all districts follow Idaho state code (IDAPA), each has unique characteristics:

  • Urban Districts (Central/CDH): Higher permit fees, stricter requirements, multiple office locations
  • Rural Districts (North Central, Panhandle): Extensive DIY resources, homeowner installer programs, single office locations

Permit fees vary significantly:

  • Central District (CDH): $94-$1,505 depending on system complexity
  • Other Districts: Generally lower fees, contact district for current rates
  • Central District: Lawful presence verification required (as of July 2025)
  • North Central: Comprehensive homeowner training materials available
  • All Districts: Site evaluation, soil testing, and engineered plans for complex systems
  1. Identify your district using the map or county list above
  2. Review district-specific documents in the collection
  3. Contact your local health district to verify current requirements
  4. Check for updates - This collection represents regulations as of November 2025

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