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On-Site Sewage Systems (OSS)
The Environmental Health Unit of the Health & Human Services Departments administers the on-site sewage program through the Rules and Regulation of the State Board of Health, Chapter 246-272A WAC.

Staff performs a wide variety of activities to carry out this regulatory oversight, including:
  • plan reviews,
  • site evaluations
  • final inspections of individual on-site sewage systems
  • technical assistance to home owners on maintenance and repair of existing systems

The Environmental Health Unit oversees the annual licensing of:

The section also maintains a list of OSS designers and engineers who regularly practice in our County.

There are brochures available with more information about septic systems.

Staff investigates all complaints of failing septic systems.

Permit application forms are available for downloading on our Forms Page. Site evaluations are done by a licensed engineer or on-site septic designer. After the site evaluation is completed, a copy of the evaluation, the septic system design and permit application, along with the appropriate fee will need to be submitted to our office.


Contact Us
Environmental Health Unit
For questions concerning septic systems:
Email

207 4th Ave. N.
Kelso, WA 98626

Ph: 360-414-5599
Fx: 360-425-7531

TTY / VCO
711 or 800-833-6384
Washington Relay

Hours
Monday - Thursday
7:30 a.m. - 5:30 p.m.
Closed from 12 to 1 for lunch

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