Minor ripples in the regional economy pushed Riverside County’s unemployment rate up slightly last month, state officials said recently.The jobless rate in October, based on preliminary estimates, was 3.9%, compared to 3.8% in September, according to the California Employment Development Department.The rate was nearly a half-percentage point lower than the year-ago level, when countywide unemployment stood at 4.3%, figures showed.Roughly 43,000 residents were out of work in October, and 1,062,800 were employed, according to the EDD.Coachella had the highest unemployment rate countywide at 11.2%, followed by the unincorporated community of Cabazon at 8.8% and the unincorporated community of Highgrove at 6.7%.The combined unemployment rate for Riverside and San Bernardi
