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Environmental Health Home

Septic Home

On-site Waste Water Regulations (246-272A WAC)
On-site Sewage Regulations
On-site Standards
Environmental Health Fees
On-site Sewage System Management Plan
Requirements for Home Sales
Records Request Form
 
On-site Sewage Permits & Designs
Procedures for Obtaining an On-site Sewage Permit
Septic System Designers
Septic System Installers
Septic Record Drawing (Asbuilt) Form
Recreation Vehicle Holding Tanks
Recording Forms
Waiver/Appeal Form
Environmental Health Review (Loan Certification or Property Evaluation)
On-site Sewage System Operation & Maintenance

Information & Resources To Help You Maintain Your Septic System
O& M Program
Maintenance Schedule
Pumpers
Operation & Maintenance Specialists
Homeowner Inspection Forms
User’s Manual: Care and Feeding of Your On-site Sewage System
 
On-site Sewage System Maintenance Requirements for Home Sales


Selling your home?
You need to know …

The Revised Mason County On-site Sewage Regulations, Chapter 6.76, approved by the Board of County Commissioners on 4/7/2009, states:

  • Transfer of resident ownership shall require a current inspection service report on the status of the on-site sewage system, prior to closing, using the form prescribed by the Director.
  • Current shall mean within three years with a system consisting solely of a septic tank and drainfield and annually for all other on-site septic system.
  • Service for an on-site sewage system consisting solely of a septic tank and gravity drainfield shall be performed by a Mason County Certified Pumper or a Mason County Certified Operation and Maintenance Specialist. All other on-site sewage systems will require a report from a Mason County Certified Operation & Maintenance Specialist.

Click to see a list of Mason County Certified Pumpers or Operation & Maintenance Specialists.