Stratford News Union Gas rates going up 28 per cent tomorrow SHARE ON: Patrick Grapes, staff Monday, Mar. 31st, 2014 If you’re a Union Gas customer get ready to dig deeper into your pockets. The company is raising its rates 28 per cent starting tomorrow. The Ontario Energy Board approved the hike last week. The incredibly cold winter is being blamed for a gas shortage which led to the request for the increase.