Clallam County Environmental Health will offer advances classes for septic systems in late March and Septic 101, a free informational septic system class, in April.

Pre-registration for the Septic 101 class is required. To register visit www.clallam.net or call environmental health at 360-417-2258. The class will be from 6-8:30 p.m. Wednesday, April 25, at the Dungeness River Audubon Center at Railroad Bridge Park, 2151 W. Hendrickson Road.

The class is an introduction geared towards homeowners wishing to learn more about their septic systems. The course describes different types of septic systems, general system care and maintenance, and do’s and don’ts for a healthy system.

Area residents interested in becoming certified to inspect their own septic system are encouraged to attend Septic 201 “Do-It-Yourself (DIY) Self-Inspection” classes.

Pre-registration for the classes is required. To register visit the website or call environmental health.

Environmental health will offer the free classes in March, May, and June.

Septic 201 classes give an overview of the what, why and how of safely inspecting a septic system, with an instructional video, a brief demonstration and a short exam.

According to a news release: “Not all septic systems are eligible for homeowner inspection, county officials note, and systems located in the Marine Recovery Area — between Bagley Creek watershed and the eastern county boundary — must have an initial inspection by a licensed septic inspector.”

Septic inspections are required by state law. Conventional gravity septic systems need to be inspected every three years; all other systems need to be inspected annually.

Local Septic 201 classes are scheduled as follows:

• 6-7:30 p.m. Thursday, March 22, in commissioner’s meeting room (160) at the Clallam County Courthouse, 223 E. Fourth St., Port Angeles.

• 6-7:30 p.m. Wednesday, June 13, at the Dungeness River Audubon Center at Railroad Bridge Park, 2151 W. Hendrickson Road, Sequim.