Stormwater management on campus is regulated by the State Water Resources Control Board (SWRCB) and the Central Coast Regional Water Quality Control Board (CCRWQCB) through the Phase II Municipal Separate Storm Sewer System (MS4) Program. UCSB’s MS4 program is implemented through the UCSB Storm Water Management Plan. The goal of stormwater management is to protect and restore the physical, chemical, and biological integrity of our nation’s waterways by controlling and limiting discharges of pollutants to these waterways.
Non-Stormwater Illicit Discharges
"Only Rain in the Drain". An illicit discharge is any unauthorized discharge other than clean stormwater. Learn examples of illicit discharges, how to prevent them, and who to notify if you see one.
What is an illicit discharge?
An illicit discharge is any unauthorized discharge other than clean stormwater. The Federal Environmental Protection Agency (EPA) defines an illicit discharge as “…any discharge to an MS4 that is not composed entirely of stormwater…” MS4 stands for Municipal Separate Storm Sewer System. UCSB is considered to be an MS4 and our watershed includes the campus storm drain system, the Campus Lagoon, the Goleta Slough, the Devereux Slough and tributaries, and the Pacific Ocean. The campus storm drain system directs all runoff that enters the storm drain to the ocean, lagoon, or the sloughs. The runoff is not treated so whatever enters the storm drain goes directly to our waterways and can possibly carry pollution.
What are examples of an illicit discharge?
Examples of an illicit discharge include:
- Sanitary wastewater.
- Effluent from septic tanks.
- Car wash wastewaters.
- Improper oil disposal.
- Radiator flushing disposal.
- Laundry wastewaters.
- Improper disposal of auto and household toxics.
- Sediment and pollutants from construction sites.
- Hosing down roads and sidewalks.
- Everything except clean stormwater and authorized non-stormwater discharges.