Sen. George Edwards, R-Garrett, said he wasn't pleased with the idea, but that ratepayers will end up paying one way or another. He also cited safety and environmental concerns.
"I'm not thrilled with $2, but I can tell you a lot of these pipes need repair," Edwards said.
Lawmakers also are weighing a proposal by O'Malley to help develop offshore wind that would add about $1.50 each month to residential rates.
Maryland analysts estimated the surcharge on gas bills could raise $36 million a year, if the maximum charge is assessed on all existing gas customers, with about $24.6 million of that coming from residential customers. About $11.4 million would come from non-residential customers.