The South Coast Air Quality Management District collects data on current air quality, provides forecasts and analyzes trends in levels of pollutants. -supply for sale or use in the South Coast Air Quality Management.Keep the Spill Prevention Control and Countermeasure (SPCC) Plan up-to date. Train employees in proper cleanup procedures of spills and leaks. A summary of environmental impacts, mitigation measures, and the level of significance after mitigation is provided on the following pages. Air quality in Riverside and surrounding neighborhoods is worsening. South Coast AQMD acts as the pollution control agency for vast portions of Los Angeles, Orange, San Bernardino, and Riverside Counties. Make the clean air zone as large as possible, focusing on areas of highest pollution exposure. Choose efficient appliances and heating systems.