The RWQCB prohibits non-storm water discharges from entering the receiving waters with few exceptions for residential purposes. Residents are encouraged to prevent non-stormwater discharges from entering the storm drain system, including reducing landscape irrigation runoff and minimizing car-washing runoff into the street.

Click here for more information on how to prevent residential stormwater pollution.

Click here for more information on best practices to maintain healthy lawns and residential landscaping while preventing over irrigation and pollution in our water ways.

Click here for more information on best practices on vehicle maintenance and washing to prevent polluted wash water from entering the storm drain system.

Swimming Pools and Decorative Fountains

Dechlorinated/debrominated swimming pool/spa discharges or decorative fountain dewatering are not permitted into the street or storm drain inlets within the City of El Segundo.  A permit may be obtained here from the City for discharge into the sewer system, in accordance with Municipal Code.

Industrial and commercial facilities, including restaurants, automotive services, retail gasoline outlets, nurseries, USEPA “Phase I” facilities, and other Federally mandated facilities, are required to comply with the RWQCB MS4 permit by preventing illicit discharges into the MS4 and receiving waters. In addition to the MS4 permit, certain industrial facilities are required to comply with the Industrial General Permit issued by the State Water Quality Control Board. Attachment A of the IGP provides a list of facilities that are required to apply for and obtain coverage under the Industrial General Permit.

As part of the program, the City of El Segundo conducts inspections of industrial and commercial facilities to ensure compliance with the MS4 permit.  The City collects a fee for stormwater-related inspections as identified in the City’s Master Fee Schedule. 

Business Assistance Program

The City of El Segundo implements a Business Assistance program to provide technical information to businesses to reduce the discharge of pollutants in stormwater. 

Click on the links to learn more about stormwater best management practices on the following topics:

• Restaurants
• Auto Shops
• Lawn Care
• Parking Lots

Assistance may also be provided to businesses upon a determination that their activities may contribute a substantial amount of pollutants to stormwater.  Activities may include, but are not limited to, power washing services, mobile carpet/drape/upholstery cleaning services, swimming pool, water softener and spa service, portable sanitary services, and commercial applicators and distributors of pesticides, herbicides, and fertilizers. 

Each business should regularly inspect its activities to ensure pollutants are not discharging to the street or storm drain inlets.  Businesses should not hose down any spills or pollutants to keep our waterways clean.  Contact the city if you have additional questions related to the stormwater business assistance program.

For stormwater requirements related to private development, refer to Planning & Building Safety Requirements. 

Best Management Practices for Construction Sites

The Los Angeles Regional Water Board and USEPA are considering potential regulatory requirements for stormwater runoff from certain commercial, industrial, and institutional (CII) facilities in the Dominguez Channel/Greater Los Angeles and Long Beach Harbor Watershed and the Los Cerritos Channel/Alamitos Bay Watershed to reduce pollutant levels in stormwater runoff that flows from these facilities. 

For more information, please click here.