Colorado has experienced significant air emissions and methane leakage caused by gas drilling that uses a combination of old equipment that is not well maintained and the failure to install available best pollution control technology. As a result of these bad practices that had been allowed under the current regulations, the increased emissions from gas drilling in the counties gas drilling are documented and have contributed to unhealthy air quality in some counties.
On Monday, Colorado proposed a new set of regulations compelling the industry to cut substantially air emissions and methane leakage. Mark Brownstein's analysis of the rules is here:
Technology exists to slash air emissions from gas drilling by about 90%, but the gas industry has not broadly implemented the best pollution controls. Colorado has had enough and now will compel a clean up. State and federal regulators should follow Colorado's lead!