A new proposal would allow states to decide whether the public can weigh in on so-called “minor” sources of air pollution.

On July 1, the Environmental Protection Agency proposed a rule eliminating federal requirements for public participation for minor sources under the Clean Air Act. This would allow state and local air quality regulators to decide whether to notify the public or allow feedback on many types of facilities.

For the oil and gas industry, “minor” sources often include production sites, compressor stations, natural gas processing plants, storage stations, and terminals. It could also include diesel generators, about the size of a tractor trailer, used by data center developers, according to the Sierra Club.

“Every single person in this country deserves clean air, and the EPA’s plan opens the door to silence communities concerned about the serious air quality and health impacts of thousands of diesel generators and other sources of pollution,” said Jeremy Fisher, Sierra Club senior advisor.

A public hearing is scheduled for 10 a.m. – 4 p.m. Eastern on July 22, with the last day to pre-register on July 19. Comments on the proposed rule are due Aug. 21.