Inicio Departments City Manager Vector Control Vector Control The Orange County Vector Control District (OCVCD) is 1 of over 100 agencies state-wide specifically dedicated to protecting public health by controlling rats, flies, mosquitoes, fire ants and other vector related problems. The OCVCD provides service to all of Orange County or 798 square miles. If you are experiencing vector-related problems, or for more information, contact OCVCD or visit the OCVCD website. Orange County Vector Control District New number: 714 971-2421 CITY MANAGER Animal Services Vector Control Community Choice Aggregation SWLF Neighborhood Improvement Needs Assessment