Oxides of Nitrogen (NOx) Facility Name City Tons per Year Duke Energy Morro Bay Morro Bay 437 Orcutt Hill IC Engines (Petroleum) Santa Maria 306 Procter & Gamble Paper Products Oxnard 151 Celite (Minerals) Lompoc 146 Cat Canyon IC Engines (Petroleum) Cat Canyon Fields 132 Tosco Santa Maria Refinery Arroyo Grande 121 Reactive Organic Gases (ROG) Facility Name City Tons per Year Aera Energy Ventura 181 Tosco Santa Maria Refinery Arroyo Grande 140 Chevron Estero Marine Morro Bay 127 Gaviota Oil & Gas Plant Goleta 102 Particulate Matter (PM10) Facility Name City Tons per Year Celite (Minerals) Lompoc 164