Business Green: Southern California has imposed price increases on its water supply as it battles ongoing drought conditions in a move that will affect roughly 19m business and residential customers. The Metropolitan Water District of Southern California has also slashed the available water supply to water providers in the state for the first time since 1991. The price hike, which takes effect on July 1, will increase the cost of water by 8.8 per cent, well above the rate of inflation. …