Lawmakers in Pennsylvania, the second-largest U.S. natural gas-producing state, last week signed a bill increasing tax credits by $30 million for in-state fertilizer and petrochemical manufacturers that use locally-produced natural gas.

House Bill 1059, dubbed the Pennsylvania Economic Development for a Growing Economy (PA EDGE), amends the Keystone State’s tax code, boosting the natural gas use tax credits from more than $26.6 million to around $56.6 million.

Companies that have invested a minimum of $400 million into an in-state fertilizer, natural gas liquids or petrochemical project could be eligible to receive the credit at a rate of 47 cents/Mcf of purchased dry gas by filing an application to the state’s Department of Revenue by March 1, once the tax credits come into...