Texas and Colorado approved rules today requiring oil and natural-gas operators to report the chemical ingredients used in new hydraulically fractured wells beginning next year.

The Texas Railroad Commission, which oversees the industry in the state, said any well receiving an initial drilling permit beginning Feb. 1 will be subject to the new chemical-disclosure rules, according to an e-mailed statement today.

The Colorado Oil and Gas Conservation Commission will require similar reporting two months later, Dave Neslin, director of the commission, said today in a telephone interview. Both require the operators to report chemicals to the public website FracFocus.org.