Denver (AP) — Noise is the biggest source of oil and gas complaints among residents in the state of Colorado.

During the past eight years, as houses and well pads inched closer across the state, complaints to the Colorado Oil and Gas Conservation Commission boomed, especially complaints about noise.

In 2010, state regulators fielded 240 complaints. By 2013, that number had risen only to 252, the Denver Post reported (http://dpo.st/2fWKV3X ). But last year, 419 complaints were filed with the state. Through July of this year, the tally is already higher — 704 complaints.

The biggest reason for t...