The city of Concord is located in the county of Contra Costa. It covers a total area of 79.0 sq. km. Industries related to advertising, aviation, alternative medicine, household appliances, automotive, boat equipment, construction, manufacturing of chemicals, household cleaning, information technology, cosmetics, pharmaceuticals, insurance, metal, oil and lubrication, publishing, real estate and telephone communication, enhance the local economy in a positive way. Businesses related to supplying swimming pool equipments, contracting in ceramic, truck repairing, website designing, wireless communication and supplies of women’s clothing, enhance the local economy of the inhabitants.