Oxides of Nitrogen (NOx)			
Air Basin	Facility Name	City	Tons/Year
San Francisco Bay Area	Martinez Refining Company	Martinez	5354
Mojave Desert	Riverside Cement Co.	Oro Grande	5030
Mojave Desert	Southdown (Cement)	Apple Valley	4483
San Francisco Bay Area	Chevron Products Company	Richmond	3031
San Francisco Bay Area	Southern Energy California	Pittsburg	2995
San Francisco Bay Area	"Tosco Corp, Avon Refinery"	Martinez	2643
San Francisco Bay Area	Exxon Corporation	Benicia	2625
Mojave Desert	Cal Portland Cement Co.	Mojave	2246
Mojave Desert	"IMC Chemicals, Inc."	Trona	2101
Mojave Desert	Southern California Gas Company	Needles	2056