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Mercury and Fish Consumption Advisories Issued for Six Louisiana Waterways

Louisiana Department of Wildlife and Fisheries

The Louisiana Departments of Health, Environmental Quality, and Wildlife and Fisheries issued a series of fish consumption advisories for six bodies of water.

Posted: May 21, 2021 10:34 AM

The Louisiana Departments of Health, Environmental Quality, and Wildlife and Fisheries  issued a series of fish consumption advisories for six bodies of water. These most recent advisories include one new warning and updates to five previously issued warnings.

The State issues precautionary advisories when unacceptable levels of mercury are detected in fish or shellfish.

The Department of Environmental Quality conducts fish sampling. LDH then uses this data to determine the need for additional advisories or to modify existing advisories. Each advisory lists the specific fish, makes consumption recommendations and outlines the geographic boundaries of the affected waterways.

Bayou Chene and Bayou Lacassine

Includes Bayou Chene from its headwaters near Jennings to its confluence with Bayou Lacassine, and Bayou Lacassine from its headwaters near Lacassine to its confluence with Bayou Misere
Women of childbearing age and children less than 7 years of age should consume no more than one meal per month* of largemouth bass and bowfin (choupique, grinnel) combined from the advisory area; OR should consume no more than two meals per month of crappie, freshwater drum (gaspergou), smallmouth buffalo and warmouth combined from the advisory area.
Other adults and children 7 years of age and older: no advisory

Bayou Nezpique

From the headwaters of Bayou Nezpique to its confluence with the Mermentau River
Women of childbearing age and children less than 7 years of age should consume no more than one meal per month of largemouth bass and bowfin (choupique, grinnel) combined from the advisory area; OR should consume no more than two meals per month of freshwater drum (gaspergou), crappie, and warmouth combined from the advisory area.
Other adults and children 7 years of age and older should consume no more than 3 meals per month of bowfin.

Big Alabama Bayou

Includes the Big Alabama Bayou for its entire length from the boat landing at Hwy 975 to its southern end near the Atchafalaya River Pilot Channel
Women of childbearing age and children less than 7 years of age should not consume flathead catfish. Do not consume more than one meal per month of any other species from the advisory area.
Other adults and children 7 years of age and older should consume no more than two meals per month of flathead catfish from the advisory area.

Little Alabama Bayou

Includes Little Alabama Bayou from its headwaters near East Krotz Springs to its confluence with Big Alabama Bayou
Women of childbearing age and children less than 7 years of age should consume no more than one meal per month of bowfin (choupique, grinnel) and largemouth bass combined from the advisory area; OR should consume no more than three meals per month of black crappie and freshwater drum (gaspergou) combined from the advisory area.
Other adults and children 7 years of age and older: no advisory

Calcasieu River Drainage Basin

Includes the Calcasieu River from Hwy 26 to the Saltwater barrier north of Lake Charles, the West Fork Calcasieu River, Houston River, Hickory Creek, Beckwith Creek, English Bayou and Little River
Women of childbearing age and children less than 7 years of age should consume no more than one meal per month of black crappie, largemouth bass, bowfin (choupique, grinnel), freshwater drum (gaspergou), spotted bass, and flathead catfish combined; OR should consume no more than two meals per month of other species caught from the advisory area.
Other adults and children 7 years of age and older should consume no more than three meals per month of largemouth bass, freshwater drum (gaspergou), and bowfin (choupique, grinnel) combined from the advisory area.

Old River (Niblett Bluff in Calcasieu Parish)

Includes the Old River from its headwaters to the confluence with the Sabine River
Women of childbearing age and children less than 7 years of age should not consume bowfin (choupique, grinnel) or freshwater drum (gaspergou); and should consume no more than one meal per month of any other species from the advisory area.
Other adults and children 7 years of age and older should consume no more than two meals per month of freshwater drum (gaspergou) and bowfin (choupique, grinnel) combined
A meal is considered to be half a pound of fish for adults

Because of mercury contamination, there are now fish consumption advisories for 49 waterways in Louisiana and one for the Gulf of Mexico.

Louisiana fish consumption advisories are based on the estimate that the average resident eats four meals of fish per month. Consuming more than this from local water bodies may increase health risks.

Mercury is an element that occurs naturally in the environment. Consequently, there are small amounts of mercury in the sediments of streams, lakes, rivers and oceans. Nearly all fish contain trace amounts of mercury. They absorb mercury as they feed on aquatic organisms. Larger predator fish contain more mercury than smaller fish. It is recommended that smaller fish be consumed instead of larger ones.

People are exposed to low levels of mercury throughout their lives. Eating contaminated fish is one way we are exposed to mercury. Health effects from harmful levels of mercury can include nervous system and kidney damage. Young children and developing fetuses are more sensitive to the toxic effects of mercury. Therefore, consumption advisories are issued at lower fish tissue concentrations for women of childbearing age and children under 7 years of age.

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