South Gate, CA Environmental Rules: Stormwater Management (2026)

The purpose of this chapter is to protect the public health, welfare and safety and to reduce the quantity of pollutants being discharged to the waters of the United States. This chapter has the following objectives:

1. The elimination of non-stormwater discharges to the municipal separate storm sewer system;

2. The elimination of spillage, dumping and disposal of pollutants into the municipal separate storm sewer system;

3. The reduction of pollutants in stormwater discharges to the maximum extent practicable;

4. The protection and enhancement of the quality of the waters of the United States in a manner consistent with the provisions of the Clean Water Act (CWA);

5. The reduction and contribution of pollutants from the MS4 through interagency coordination.

B. Definitions. For the purpose of this chapter, unless it is plainly evident from the context that a different meaning is intended, certain terms used herein are defined as follows:

1. "Best management practices" ("BMPs"). BMPs are practices or physical devices or systems designed to prevent or reduce pollutant loading from stormwater or non-stormwater discharges to receiving waters, or designed to reduce the volume of stormwater or non-stormwater discharged to the receiving water.

2. "Biofiltration"