• Visit the Environmental Health Codes, Regulations and Hearing Requests page for the most up to date Fee Schedule
• Common Septic and Conditional Site Approval Fees

• Craft 3 - Loans to Replace Failing Septic Systems - Craft 3 Community Partners administer low-interest loans to help residents who live in Thurston County repair failing septic systems.
• Low Income Grants - Need financial assistance for basic septic system maintenance? Thurston county has a small grant program for Thurston County homeowners who live in the shellfish growing areas of Dana Passage, Totten, Eld, Henderson, Nisqually, and northern portion of Budd Inlet. The Grant provides funds to qualifying homeowners for septic system inspections, tank pumping, tank access riser installation, and minor system repairs.
• Riser Rebate Request Form and Information - This program offers up to $200 for the installation of septic tank risers and secondary safety devices over septic system manholes. Risers make future inspections and pumping much easier, with little to no digging required. This rebate is available for existing septic systems only. For questions, call 360-867-2626.

On-site Evaluation

• Supplemental Application-Onsite Evaluation (Guidelines)
• Property Information
• Hydrogeologic Report & Assimilative Capacity Guidance

New On-Site Septic System, Tank Placement and Septic System Repair Project Application (both Supplemental and Master Applications required)

• Supplemental Application
• Property Information
• On-Site Septic Design Revision Submittal Form
• On-Site Sewage System Abandonment Application (Guidelines) 

• Record Drawing Request Form
• Winter Water Study Application
• Installer Completion Form
• Drainfield Easement Agreement
• Septic System Easement (for parcels with the same ownership)
• Administrative Hearing Process
• Request for Appeal
• Request for Appeal to the Thurston County Board of Health
• Request for Waiver or Variance from Sanitary Code Provisions - Article III and IV
• Request for Waiver or Variance from Sanitary Code Provisions - General
• Refund Request Form

• Thurston County On-Site Septic System Management Plan (December 2025) 

• On-site Sewage System (OSS) Management Plan Infographic 

• Submitted Public Comment (pending)