The City of Yelm manages the wastewater collection system in Yelm, Washington, using a unique pressurized system called a STEP system, which stands for Septic Tank Effluent Pump. This system includes a holding tank, a screen chamber, and a small pump that conveys wastewater to the Water Reclamation Facility for treatment to meet Class A Reclaimed Water standards.
Residents are advised to avoid flushing non-organic materials, such as disposable diapers, sanitary napkins, and paper towels, as well as fats, oils, and greases, to prevent the failure of the STEP system. Additionally, maintaining clearances around tank lids and the electrical alarm box is necessary to ensure proper access for maintenance and avoid damage to landscaping items.
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