Louisiana adds and updates its list of waterways with high mercury levels in fish

By: Elise Plunk

Outlets: Louisiana Illuminator

Published: September 24, 2026

Words: 305

Last Updated: 2 weeks, 3 days ago

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Two new waterways have been added to a list where Louisiana officials warn people should limit or avoid eating certain fish species after high levels of mercury were detected in samples.

The two new warnings are for Mermentau River and Lake Arthur as well as the Vermillion River and Bayou Tortue. Existing warnings, first issued more than 20 years ago, have been updated for five areas:

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