BALTIMORE (AP) — The owner of a coal plant on a river north of Maryland may have to pay a $1 million fine over pollution leaking into the river and flowing into the Chesapeake Bay.

Talen Energy and its Brunner Island coal plant reached a consent decree with environmental groups and regulators that’s expected to be filed in federal court this week. The plant is about 50 miles (80 kilometers) upstream of the Chesapeake on the Susquehanna river. The river sends fresh water to the Maryland bay.

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The paper says that last year, groups raised concerns about chemicals leaking into groundwater from coal waste. In the settlement, the plant owner agreed to investigate and address contamination.

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Talen official Debra Raggio said it’s committed to complying with environmental regulations.

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