Public Service Company of New Hampshire says they expect to ask the Public Utilities Commission to increase rates. PSNH is required to forecast what it will be asking for in rate increases, when the rate comes up for review at the end of the year. However, if the current predictions hold, spokesman Martin Murray says residential customers using 500 kilowatt hours a month would see their monthly electric bill rise by $4.30. PSNH customers are already paying the highest rate out of all other states utility customers. Murray blamed government mandates for the higher costs, saying the company’s rates 10 years ago were among the lowest in New England before mandates were introduced that other utilities do not pay for.