Frequently Asked Questions (FAQs)

No. Work that is conducted within the septic/pump tank does not require a permit generally. Examples of this type of work that do NOT require a permit includes cleaning, changing, or retrofitting your tank with an effluent filter, measuring sludge accumulation, pumping the septic tank/pump chamber, or cleaning of the back-flow prevention valve. If the tank needs to be replaced, this DOES require a permit for tank placement.

The permit application fees are available here (see "Fees" at the bottom of the page).

Yes. Any work outside of the septic tank requires a permit.

Stop by the Lewis County Public Services Building (2025 NE Kresky in Chehalis) and fill out a public records request. If the system was permitted, we should be able to provide you with the as-built drawing.

Call Lewis County Code Enforcement at 360-740-2718.

You can find information on Washington State Department of Health's website.

You can find information on caring for your septic system here.

Here are some of the signs of septic system failure. If you suspect your septic system is failing, contact a Professional. Most often the first step is to get your tank(s) pumped in order to assess the failure.