Reliable Septic Solutions When You Need Them

Inspection and pumping frequency depends on the type of septic system, household size, wastewater use, tank capacity, and the amount of solids that accumulate. Washington requirements may also call for more frequent inspection of systems with pumps, mechanical components, or other advanced treatment equipment.

A regular maintenance schedule makes it easier to identify developing problems before they turn into backups, drainfield damage, or expensive repairs.

• Gravity systems in Washington generally require inspection at least once every three years.
• Other system types may require annual inspection.
• EPA guidance commonly places household septic pumping in the three-to-five-year range.
• Larger households and heavier water use can require more frequent pumping.

Septic problems can show up inside the home or outdoors around the tank and drainfield. Slow drains, sewage odors, unusually wet ground, or wastewater surfacing on the property should not be ignored.

A failing system can affect both public health and the surrounding environment, so early evaluation is important when something appears abnormal.

• Multiple slow drains or recurring plumbing backups.
• Sewage or septic odors around the home or yard.
• Standing water or unusually saturated soil near the drainfield.
• A septic alarm that activates repeatedly.
• Unusually lush or rapidly growing vegetation over part of the drainfield.

A septic system is designed to treat household wastewater, but it is not designed to handle every material that can be flushed or poured down a drain. Items that do not break down properly can contribute to clogs, excess solids, or treatment problems.

Careful everyday use can reduce stress on both the septic tank and the drainfield while helping the system perform more reliably.

• Avoid flushing wipes, paper towels, hygiene products, or other non-biodegradable materials.
• Do not pour grease, cooking oil, or large amounts of food waste down drains.
• Keep paints, solvents, pesticides, and harsh chemicals out of the septic system.
• Use water efficiently to avoid unnecessarily overloading the system.

Washington regulates on-site sewage systems through state rules that are administered in coordination with local health jurisdictions. New systems and many alterations or replacement projects can involve site evaluation, system design, permitting, and inspection requirements.

In Chelan and Douglas Counties, the local health district oversees septic permitting and final inspections, so property-specific requirements should be confirmed before work begins.

• New septic installations require local permitting.
• Site and soil conditions affect which system designs are acceptable.
• Some designs must be prepared by a licensed designer or professional engineer.
• Final installation inspections are handled by the local health jurisdiction.

The drainfield receives wastewater that has already passed through the septic tank and distributes it into the surrounding soil for additional treatment. Soil conditions, drainage, water use, and the type of septic system can all affect how effectively this process works.

Protecting the drainfield from compaction, excess water, and physical damage can help preserve the long-term performance of the entire septic system.

• Do not drive or park vehicles over the drainfield.
• Direct roof drains and surface runoff away from the septic area.
• Avoid structures or landscaping that can damage buried components.
• Know what type of septic system is installed on your property.
• Have drainage or performance problems evaluated before they become more severe.