📍 Service Area
This collection contains authoritative statewide technical resources from Idaho DEQ:
- Technical Guidance Manual (350+ pages, 15 MB) - The definitive reference
- 20 Guidance Memorandums (1993-2021) - Regulatory interpretations
- Approved Products Database - 50+ manufacturers
- Nutrient Pathogen Evaluations Guide (26 pages)
Two massive training manuals (23 MB combined):
- Basic Installer Training (98 pages, 13 MB)
- Complex Installer Training (63 pages, 10 MB)
These are the most comprehensive installer training resources in the entire knowledgebase.
Unique 7-page Homeowner Installer Manual for DIY property owners doing their own work - rare among health districts.
All documents open in a new tab. Click any PDF below to view the original document.
Public Health – Idaho North Central District
215 10th Street
Lewiston, ID 83501
Phone: 208-799-3100
Fax: 208-799-0349
Hours: Monday - Friday, 8:00 AM - 5:00 PM
Environmental Health: By appointment only
Now offered online through Idaho DEQ:
https://www.deq.idaho.gov/water-quality/wastewater/septic-and-septage/
- Basic installer training (required for standard systems)
- Complex installer training (required for advanced systems)
- Refresher training courses (in-person only)
- Bond requirement (see bond form)
- Issue permits for new and repaired septic systems
- Enforce DEQ Rules for Individual and Subsurface Sewage Disposal Systems
- Conduct site evaluations for on-site sewage disposal suitability
- Perform system installation inspections
- Investigate sewage complaints and recommend corrective actions
- Provide installer training and refresher courses
North Central Public Health District serves rural and mountainous Idaho:
- Idaho County - Idaho's largest county by area, very rural
- University presence - University of Idaho in Moscow (Latah County)
- Lewiston - District headquarters, regional hub
- Clearwater - Remote mountain communities
- Agricultural areas - Lewis County farming communities
- High reliance on septic systems throughout the district
- DIY Installation: Homeowner installer manual
- System Care: Homeowner's guide to septic systems
- Permits: Step-by-step application instructions
- Certification: Complete basic and complex training courses
- Reference: Technical Guidance Manual (DEQ)
- Licensing: Installer registration application with bond
- Current Standards: Training materials and guidance memos
- Design Standards: DEQ Technical Guidance Manual (350+ pages)
- Alternative Systems: Complex installer training manual
- Nutrient Management: Nutrient Pathogen Evaluations Guide
- Diagrams: 85 technical diagrams available
- Regulatory History: 20 guidance memorandums (1993-2021)
- Technical Evolution: Training material updates
- Groundwater Protection: Nutrient pathogen assessment program
This collection uniquely includes authoritative statewide materials applicable to all Idaho counties:
The 350-page DEQ manual is the official reference for:
- System designers across all health districts
- Engineers working anywhere in Idaho
- Installers needing definitive guidance
- Health district staff making determinations
20 interpretive documents (1993-2021) provide regulatory clarification on specific issues.
Database of 50+ manufacturers with products approved for use in Idaho.
Collection archived November 3, 2025. Always verify current requirements with the health district and DEQ.
Clearwater County - Rural mountain communities • GIS Map →
Idaho County - Idaho's largest county by area • GIS Map →
Latah County - Home to University of Idaho (Moscow) • GIS Map →
Lewis County - Rural agricultural area • GIS Map →
Nez Perce County - Lewiston (district headquarters) • GIS Map →
