The federal Environmental Protection Agency has issued an administrative penalty complaint against the Utah city of Duchesne for alleged failure to comply with its wastewater discharge permit.

Duchesne's discharge permit, issued under the Clean Water Act, requires both twice-monthly and more intensive semiannual monitoring for ammonia toxicity, the EPA said in a release.Except for sporadic monitoring on five occasions since February 1987, the city has failed to comply with the requirement, the agency said.

The EPA has proposed a penalty assessment of $4,000, which accounts for the nature and gravity of the violations, Duchesne's prior history of compliance and other factors.

The city may request a hearing within 30 days after receiving the complaint in order to contest specific facts related to the EPA's findings and the appropriateness of the proposed penalty.

If the city does not request a hearing, EPA will issue a final penalty order.