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Lagoon Fact Sheet

Listing of Certified Installers



A lagoon is a treatment method that utilizes a septic tank for primary treatment with the clarified effluent from the tank being discharged into a lagoon where sunlight, temperature, and wind provide the final treatment.

Tips to keep your Lagoon working properly:

  • Have your septic tank pumped periodically.

  • A permanent vegetative cover should be established on the lagoon dike as soon as possible to prevent erosion.

  • Vegetative growth should be controlled to assure necessary sunlight exposure and air movement. Mow regularly.

  • Do not allow trees to grow around the lagoon.

  • Do not allow livestock to graze around the lagoon. Livestock can damage the dikes.

  • A fence should be constructed to discourage entry and control access.

Signs of Lagoon System Malfunction:

  • Sewage should never discharge from the lagoon.

  • Lagoon too full? Check your home for any leaky faucets or toilets.

  • Lagoon levels look low? Check the lagoon dikes for any leaks.

  • Lift station alarm activated (if a lift station included in design)

  • Scum layer forming on surface of lagoon

  • Sewage odors

Water DropOn-site treatment systems are designed to treat and disperse a set number of gallons of wastewater a day. If the amount of wastewater is exceeded, then your on-site system may malfunction. It is recommended that water-conserving fixtures be installed in residences. Please contact your local DEQ office for additional information concerning maintenance of your on-site system.