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1. How often do I need my septic tank pumped?

Your tank should be checked to measure the solids accumulation in the tank every 3 years. Learn how to inspect your tank, how to measure the solids and how to install access risers for ease of maintenance, by viewing the Monitoring / Inspection (EES) page.

2. Who should I call to pump my septic tank?

We certify septic tank pumpers for on-site sewage systems and have a list of currently licensed individuals. You can also look in the phone book under septic tanks and systems-cleaning. Ask if they are licensed in Jefferson County. View the Certified Septic System Professionals list.

3. How much does it cost to have my tank pumped?

Between $300 and $400; it depends on tank size because they pay for disposal based on gallons pumped.

4. What can I plant on my drain field?

Generally you want to use plants with a shallow root system that can be mowed or maintained. Trees and shrubs should be planted at least 10 feet away. Washington State University (WSU) has some written information on landscaping over drain fields.

If you have a specific plant you want to know about you can call WSU at 360-379-5610 and leave a message for a Master Gardener. They can tell you about the particular plant and if it would be appropriate.

5. Where else can I go for information?

Pamphlets are available on different types of systems and basics of caring for your septic system.

Check our “Quick Links” for other useful sites. They have information on different types of septic systems, landscaping and caring for your system, and controlling erosion and stabilizing banks.

View the Resources for Homeowners page.