CO-MO Electric Cooperative is bumping up its service charge to customers. The cooperative says the increase is needed to fund continuing improvements to reliability and efficiency. The cooperative’s board of directors approved a $4-dollar monthly increase to the amount typical residential members pay to have service available when they flip the switch or need to heat their home. Officials say the monthly increase will allow the cooperative to generate an additional four percent in revenue annually, which will enable them to invest in needed system improvements. CO-MO has had one rate increase of 3.5 percent since 2010. The 2014 adjustment goes into effect in April.