Septic Systems

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Program Overview 

Our on-site sewage program provides permitting, review, inspection, and education services to support safe and compliant septic systems in Yakima County.

What is a Septic System?

A septic system is an underground wastewater treatment system for homes that are not connected to a public sewer line.  

When water is used through sinks, toilets, showers, or laundry, the wastewater flows into a septic tank and then into a drain field.

How do I Know if I Have a Septic System? 

You may have a septic system if: 

• You do not receive a sewer bill
• Your neighbors have a septic system
• You have well water

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