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King County Washington home

Maintaining your on-site sewage/septic system

Tips and resources to help you maintain your sewage/septic system.

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About septic systems

Find common questions and answers about on-site sewage/septic systems.

On-site sewage/septic system inspections

Learn the benefits of regular inspections and what the process looks like.

Professionals who can help

Find a list of on-site sewage/septic system professionals.

Landscaping with an on-site sewage/septic system

Find ways to landscape your yard with an on-site system, including suggested plants.

Sewage spills and septic system failure

Learn what to do if you have a sewage/septic system spill or failure.

What to do during a power outage

Find out what you should do during a power outage.

Other on-site sewage/septic system resources

Septics101 (Full Course): A Guide to Septic System Maintenance

Learn how on-site sewage systems (septic systems) function and how to take care of them. This video shows the entire course (5 video chapters) and runs about 19 minutes. You can also view each video chapter separately.

Happy “Septic” Hour Workshop: Everything Food Facilities Should Know about Septic Care!

Do you own or operate a food-handling facility on septic system? This workshop gives you everything you should know to maintain your septic system work well and prevent it from failing! Understand how septic system works and specific septic maintenance tips for food facilities, know where you can find the septic record, and be aware of financial assistance you can utilize for septic system repairs or replacement.

Join your local septic team to help keep our water clean

Public Health – Seattle & King County is recruiting neighbors to join local Septic Teams to help share information and answer questions about septic systems. We're looking for community members in Carnation, Fall City, Federal Way, Auburn, and Enumclaw who are interested in partnering with Public Health to help their neighbors with septic systems protect their health, the environment, and save money.