Mason County Washington - Government Information
Mason Couty Home Mason County Employment Mason County Forms and Brochures Mason County Phone  Numbers and Addresses Mason County Campus Map
Mason County Code & Regulations Mason County Community Links Mason County Tourism Mason County Site Search Mason County Advisory Boards Ask questions
Public Health Home What is Public Health? Board of Health Contact Information
Health Information Office of the Director Environmental Health Community and Family Health
Public Health Home
On-Site Sewage Systems

Codes & Regulations

Environmental Health Fees

On-site Sewage System Permit Application Process

Maintaining your On-site Sewage System

Maintenance Requirements for Home Sales

Septic System Professionals

On-site Sewage & Water Review  (Loan Certification)

Property Evaluation for On-site Sewage System Suitability

Recreation Vehicle Holding Tanks

Requesting Your On-site Sewage System Records

On-Site Sewage System Educational Information


Search Maintenance Records

Holding Tanks for Recreational Use Vehicles

Holding tanks for Recreational Use Vehicles are permitted through a state and local waiver process.  The vehicle must be licensed and able to be moved. All liquid waste water, including grey water, must not be dumped on the ground or in surface water.

A Mason County Certified Installer must install the RV holding tank. The tank must be on the Washington State Department of Health Registered List of Sewage Tanks and be at least 1200 gallons. The tank must be installed with audio & visual alarms and risers.

Holding tanks are not allowed for park-model trailers. They require a complete on-site sewage system.

Click here for a printer-friendly packet of permit application forms and application procedures.

Environmental Health Home Public Health Home Mason County Home Search Our Site