Subsurface Drip System (SSD)

Your system should be inspected 30 days after the system is operational and annually thereafter.

A more stringent monitoring frequency may be recommended by the manufacturer. For more information, see the Washington State Department of Health List of Registered On-Site Treatment and Distribution Products.

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1. Gravity System
2. Low Pressure Distribution System (LPD)
3. Low Pressure Distribution System (LPD) with an Aerobic Treatment Unit (ATU)
4. Subsurface Drip System (SSD)
5. Subsurface Drip System (SSD) with an Aerobic Treatment Unit (ATU)
6. Oscar System
7. Mound System
8. Sand Filter System