A recently created interactive map shows people where pollution has created a Louisiana waterway that is not safe for swimming. It also tells fishermen if it is safe to eat their catch.
The map shows 58 lakes, bayous and other waterways where contaminated fish are contaminated, the bottom is too dirty for safe swimming or both. Most points prevent eating fish or shellfish; two also warned against swimming. The two others warn against swimming.
The biggest advice covers all state waters in the Gulf of Mexico. That's nearly 1,200 square miles.
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Clicking on a fish-and-fish-hook icon brings advisory. Zoom in, and larger bodies of water in the affected areas appear in dark blue. Those areas may be clickable but estimates; The adjacent areas of dark and pale blue are not boundaries, scientists Al Hindrichs of the Department of Environmental Quality said on Friday (February 8). "Be sure to read the details," he said. That's because the recommendations depend on what fish finds from a place and how much it has, so their diversity varies from place to place.
For example, the state says that no one should eat any fish from Capitol Lake in Baton Rouge, while in Upper Calcasieu Estuary, the only crab fat is on the do-not-eat list. For 83 miles along the Tensas River, the consultation only states, "Long-term fish use can cause health hazards."
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flurry. Most people are advised against eating more than a total of four eight ounce meals a month of fish caught in the state water, except the king mackerel. People should eat at least twice a month of the king mackerel ̵
In spoken language, "a meal" means 8 ounces. ] Advisories also describe which chemical, heavy metal or other substance is causing the problem. In Capitol Lake, these are the man-made chemicals called PCBs. In the Calcasieu and Cameron constituents, PCBs, dioxins and furans were found in crab fat. Together with the Tensas River in Madison, Tensas and Catahoula parishes, the prohibited DDT and toxaphene pesticides are contaminants.
These are just the exceptions of one type: The nine advisories are for organic compounds of one kind or another, while the other 49, including the waters of the Gulf of Mexico, is for mercury , Hindrichs said.
Golf refinement is likely because the fish is "high predator," not because there is more mercury in the ocean, Hindrichs said. He said that even some mercury may be acquired in other waterways – including parts of the Ouachita basin – from old oil and gas meters, in most areas all out into the environment. If the conditions are correct for it to change from elemental mercury to highly toxic organic compound called methylmercury, it can easily be used in the food chain, he said.
Every advisory results from state departments of Environmental Quality, Health and the Wildlife and Fisheries that work together. Hindrichs said the map went on in December. Sibley Lake, the reservoir for Natchitoches, was removed since early January, after enough fish samples proved to be purest in polychlorinated biphenyls.
Most advisories suggest limits anywhere from eight ounces a week to six eight-ounce meals a year. Recommendations depend on where a species is in the food chain, because fish that eat other fish are caught in the mercury they eat.
Advisories for Bayou Bonfouca on St. Tammany Parish and Bayou Olsen in Lake Charles avoid swimming or contact the sediment. Two others for Swamp Swamp, Swamp Lake and Bayou Baton Rouge, and one for Bayou d & # 39; Inde and part of the Calcasieu Ship Channel – advice against both fish food and swimming or handling sediments.
"Do not eat fish or crawfish from this place," reads counseling for the Devil Swamp and related places. Fish advice is for PCBs and mercury; Swimming is for mercury, lead, arsenic, benzene and butadiene.
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Story of Janet McConnaughey.