Oxides of Nitrogen (NOx)		
Facility Name	City	Tons per Year
Riverside Cement Co.	Oro Grande	5030
Southdown (Cement)	Apple Valley	4483
Cal Portland Cement Co.	Mojave	2246
"IMC Chemicals, Inc."	Trona	2101
Southern California Gas Company	Needles	2056
Mitsubishi Cement	Lucerne Valley	1794
Calaveras Cement Co.	Monolith	1562
National Cement Co.	Lebec	1524
PG&E Hinkley Compressor Station	Hinkley	1078
Reliant Energy	Daggett	875


Reactive Organic Gases (ROG)		
Facility Name	City	Tons per Year
Reliant Energy	Daggett	217
Riverside Cement Co.	Oro Grande	127


Particulate Matter (PM10)		
Facility Name	City	Tons per Year
U.S. Borax	Boron	614
"IMC Chemicals, Inc."	Trona	526
Mitsubishi Cement	Lucerne Valley	472
Southdown (Cement)	Apple Valley	277
Riverside Cement Co.	Oro Grande	251
National Cement Co.	Lebec	234
Cal Portland Cement Co.	Mojave	117