AUGUSTA — A revised bedbug ordinance would allow the city to take action when rental properties become so infested they risk spreading the pests to neighboring properties, city officials said Thursday. City councilors discussed the revised bedbug ordinance, which, unlike an emergency ordinance passed previously, would apply to all rental buildings in the city, not just multi-units, and would allow tenants who don’t cooperate with efforts to get rid of bedbugs to be held responsible for the cost of treating an infestation. Councilors expressed support for the ordinance Thursday, and the proposal is expected to go to them for a first of two required readings at their next business meeting. Changes were made to the emergency ordinance adopted May 5 after a bedbug infestation was discovered at two Water Street boarding homes.