EVERETT, Wash. (AP) - Seattle-based Cedar Grove Composting Inc. has been given a deadline to track down the sources of offensive odors coming from its Smith Island site in Snohomish County and tell how it plans to deal with them.

The Puget Sound Clean Air Agency has given the business until Sept. 30 to have a plan in place.

After that, the agency and the business will negotiate a timeline for action, according to Jim Nolan, the agency's compliance officer.

The agency has the power to fine the company.

Complaints about a foul stench coming from Smith Island increased in June. People who live in Marysville and north Everett complained of an odor that went from occasional and bearable to persistent and overpowering.