Stormwater Source Control (SC) Program

The City of Redmond is launching a Stormwater Source Control and business inspection program to help prevent stormwater pollution from businesses and government properties. This program implements federal and state requirements, but more importantly, it helps keep our streams, lakes, and groundwater healthy for residents, businesses, and wildlife.

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What is Stormwater Source Control?  

Stormwater source control is an approach to finding potential pollution sources and stopping them from mixing with rainwater and entering a stormdrain. Depending on your location within Redmond, runoff from your property will either infiltrate (flow into groundwater), flow to the City’s stormwater drainage system, or travel directly to a nearby creek, river, wetland, or lake. Redmond Stormwater Source Control staff work with businesses and property owners to identify potential pollution sources before the stormwater drainage system or surface waters are impacted. Stormwater Source Control staff share information on stormwater Best Management Practices (BMPs)   to help reduce and remove these potential pollution sources and help enforce city pollution prevention codes.

What are Source Control Best Management Practices (also called BMPs)?

BMPs are devices and actions that reduce or prevent pollution. Some stormwater BMPs make sense to implement at every location:


Spill Kit

Be prepared for spills by preparing a spill kit and spill plan. Here is a Spill Plan Template for your use.



Always close dumpster lids. Swap out dumpster/trash compactors if they have holes or leaks.


Hazardous Materials

Store hazardous materials (oil, gas, etc.) inside your building, or provide cover and containment. Never store near a stormwater drain.


Only Rain in Drains

Never wash or allow pollutants like soap, mop water, or oil into storm drains.

Other BMPs are specific to the types of activities that occur at your site. The Department of Ecology provides information on business activity-specific BMPs. Visit the Source Control BMP Library for more information