Home About Engineering ENGINEERING At Your Service Mesa Water is here to support your development project. Our staff reviews plans to ensure new development and improvements meet the needs of both commercial and residential customers. Please check the interactive service area map to make sure your property is within our service area. Mesa Water’s Plan Check Desk is located in the lobby of our offices at 1965 Placentia Ave. in Costa Mesa. Our Engineering team is available to help with your plans or answer questions or concerns. Hours of operation Monday-Thursday 7:30 a.m. to 5:00 p.m. Friday 8:00 a.m.- 3:30 p.m. Contact Engineering at 949.631.1291 About Us Customer Survey Engineering Development Services Rules and Regulations for Water Service Standard Specifications Financial Services Human Resources Operations Operational Efficiency Orange County Groundwater Basin Our History Transparency
