The Emerald Coast Utility Authority has approved a 2-percent rate increase for water, sewer and sanitation customers effective October 1st. For the single-family residential household with an average consumption of 6,000 gallons a month the increase would be 64 cents per month. For sewer, the base rate increase will be $1.01 for the average residential customer. A family residential customer with one 90-gallon or smaller container, the sanitation rate will increase 91 cents.