HOUSTON (AP) — Texas regulators have adopted rules requiring oil and gas drillers to disclose on a website the chemicals used in hydraulic fracturing operations.
The Texas Railroad Commission adopted rules Tuesday to enforce a law passed by the Legislature earlier this year.
Texas wants drillers to be more open about chemical-laced water used to crack dense rock formations to withdraw oil and gas. The process is known as fracking and some environmental groups say the chemicals taint the water and pollute the air.
Some companies have argued the chemical mix is proprietary.
Texas will require companies to disclose chemicals but not concentrations. Other states, such as Colorado, require disclosure of concentrations.
Beginning Feb. 1, the companies in Texas must list the chemicals on a national registry, www.fracfocus.org .