15 Years of Service and Quality

BIA of Clark County

Onsite Septic Systems

Areas We Serve

  • Clark County, WA
  • Battle Ground
  • Camas
  • Hazel Dell
  • Orchards
  • Ridgefield
  • Vancouver
  • Wahkiakum County, WA
  • Cathlamet
  • Grays River
  • Puget Island
  • Cowlitz County, WA
  • Castle Rock
  • Cougar
  • Kalama
  • Kelso
  • Longview
  • Ryder
  • Woodland
  • Yale
  • Skamania County, WA
  • North Bonnevile
  • Stevenson

Onsite Septic Systems (OSS): Proper Care of Your Septic System

Almost one quarter of the homes in the United States utilize on-site septic systems (OSS) to dispose of wastewater. In Clark County, septic systems make up the majority of the sewage disposal systems in rural, un-sewered areas. Septic systems, unlike public sewer systems, require regular maintenance and inspection in order to remain working properly.

Septic systems are made up of two main components: the septic tank and the drainfield. These two separate parts work together to dispose of waste and filter wastewater. The septic tank removes solids to prevent clogging the drainfield, and stores up to half of these solids in the bottom of the tank. The drainfield further treats the waste and spreads it out to allow it to decompose and filter through the soil, removing contaminants.

If you own an on-site septic system, you are responsible for properly monitoring and maintaining the system. This reduces the risk of problems or system failure.

Maintaining Your Septic System

  • Have your septic tank pumped regularly.
  • Have your septic tank inspected regularly.
  • Keep records of all septic maintenance and repair.
  • Learn the location of your septic system and drain-field. Keep this information with your maintenance records.
  • If you experience problems with your septic system, contact a professional.
  • Conserve water to avoid overloading the system.
  • Divert other sources of water away from system.
  • Don't use septic tank additives.
  • Don't dispose of non-biodegradable trash in your septic system.

Have questions about your septic system? Check out our FAQ.

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Seppanen Construction, LLC
La Center, WA
(360) 263-7950
Washington: SEPPACL974JC
Oregon: CCB 155619