Tetra Tech Inc. said Wednesday that it has signed a contract with the U.S. Environmental Protection Agency worth an estimated $15 million.


The contract is to provide technical support as the Pacific Southwest Region implements water programs associated with the Clean Water Act, Marine Protection and Sanctuaries Research Act, and Safe Drinking Water Act, the Pasadena-based company said.


The contract expands Tetra Tech's technical work with the EPA's west coast and coastal protection programs. The EPA's western region includes Arizona, California, Hawaii, Nevada, and the Pacific Islands.


Shares in Tetra Tech were up 10 cents to $18.48 in early trading Tuesday.

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