Costa Mesa Sanitary District | Utilities | Government Officials/Agencies - Costa Mesa Chamber of Commerce, CAThe Costa Mesa Sanitary District (CMSD) was established in 1944 as a special district under the Sanitary District Act. CMSD service area covers approximately 15.7 square miles with a population of approximately 118,300 residents.  The District provides wastewater services and solid waste collection services. 

Contact Information   

  • Address: 290 Paularino Avenue                        Costa Mesa, CA 92626

  • Year Established: 1944

  • Phone: (949) 645-8400

  • Website: www.cmsdca.gov

  • Hours:Mon-Thur 7:30 a.m.- 4:30 p.m.    Friday: 7:30 a.m. – 3:30 p.m.                 

About CMSD

District’s Boundary Map

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Google Maps

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District’s Sphere of Influence

CMSD's SOI