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Surface Water Management Division
Pollution Investigation and Technical Assistance Program
Failed Septic Systems
The Problem
Failed septic systems release wastewater from houses and businesses before it receives full treatment. The most noticeable effect of a failing septic system is the smell at the point of surfacing effluent. If the system has been failing for some time, or the effluent is concentrated, gray slimy algae can be associated with the discharge. Improperly treated wastewater contains high levels of pathogens that can cause diseases in humans who contact the water. Excessive nutrients in wastewater deplete oxygen in the streams and contribute to algae blooms in lakes.
To Correct the Problem
Call the Water Quality Assistance Line at Snohomish County Surface Water Management 425-388-6481.
Prevention
For specific information about your septic system and how to maintain it, contact the Snohomish Health District at 425-339-5250.
Inspect septic tanks every 2-3 years.
Do not put household and industrial chemicals in drains that lead to septic systems.
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