A recent study is recommending a water rate increase for users within the Carlsbad Municipal Water District. The cost of service study is requesting the CMWD fall in line with industry standards for its revenue, which consists of 30 percent from fixed rate funds and 70 percent of rate per unit of water used. Currently, the city collects 27 percent from fixed rates and 73 percent from rate per unit. A public hearing will be held Nov. 29 at 6 p.m. at City Hall, 1200 Carlsbad Village Drive. CMWD customers have until Nov. 29 to submit protest letters.