Human health protection through fish consumption and swimming advisories in Louisiana.
(Last Updated February 9, 2018)
Note: One meal is considered to be one half pound of fish.
|Mercury Advisory Map Key and Links to Advisory Details|
|Map Number||Water Body Name||Map Number||Water Body Name|
|1||Amite River Drainage Basin||25||Chicot Lake|
|2||Bayou Bartholomew||26||Clear Lake (Lake Edwards)|
|3||Bayou Bonne Idee||27||Cocodrie Lake|
|4||Bayou Chene and Bayou Lacassine||28||Corney Lake|
|5||Bayou De L’outre and Associated Lakes||29||Crooked Creek Reservoir|
|6||Bayou De Siard||30||Grand Bayou Reservoir|
|7||Bayou des Cannes||31||Gulf of Mexico off Louisiana Coast|
|8||Bayou Dorcheat||32||Henderson Lake area including Lake Bigeux|
|9||Bayou Liberty||33||I-10 Canal and Work Canal and Bayou Bristow|
|10||Bayou Nezpique||34||Iatt Lake|
|11||Bayou Plaquemine Brule||35||Ivan Lake|
|12||Bayou Queue De Tortue||36||Kepler Creek Lake|
|13||Big Alabama Bayou||37||Lake Bistineau|
|14||Black Bayou Lake (Caddo Parish)||38||Lake Louis (Lovelace Lake) and Bayou Louis|
|15||Black Bayou Lake (Ouachita Parish)||39||Lake Vernon|
|16||Black Lake||40||Old River (Niblett Bluff)|
|17||Blind River||41||Ouachita River|
|18||Boeuf River||42||Pearl River|
|19||Bogue Chitto River||43||Saline Bayou and Saline Lake|
|20||Bogue Falaya and Tchefuncte Rivers||44||Seventh Ward Canal|
|21||Caddo Lake||45||Tangipahoa River|
|22||Calcasieu River Drainage Basin||46||Tew Lake|
|23||Catahoula Lake, Little River, Old River, Black River, Saline Lake, Larto Lake (Saline/Larto Complex), Shad Lake & Associated Water Bodies||47||Tickfaw River Drainage Basin|
|24||Cheniere (Brake) Lake||48||Toledo Bend Reservoir|
Location and Condition of Louisiana's Mercury Related Fish Consumption Advisory Signs. If you see a damaged or missing advisory sign, please contact the LDEQ at (225) 219-3189 or by e-mail to Water Planning and Assessment Division.
The Louisiana Department of Health (LDH) Health/Fish Consumption Advisories Program, in conjunction with the Louisiana Department of Environmental Quality (LDEQ), issues fish consumption and swimming advisories to help ensure the safe enjoyment of Louisiana's water resources. The Louisiana Department of Wildlife and Fisheries (LDWF), and the Louisiana Department of Agriculture and Forestry (LDAF) are also consulted during the course of advisory development and dissemination. An Interagency Agreement between the four agencies was agreed upon July 9, 2012.
Louisiana's fish consumption advisories are developed using a risk based public health assessment method which establishes consumption levels designed to prevent adverse effects. This approach is used to determine safe consumption levels for different segments of the population. For example, children and pregnant or breast-feeding women are often considered separately in developing consumption advisories because these populations are generally considered to be at greater risk from consumption of contaminated seafood. Therefore, consumption advisories will often be stricter for these populations.
In most cases fish are sampled by the LDEQ in areas of suspected chemical contamination such as near facilities that have experienced spills or had poor wastewater management practices in the past. Where such problems are found LDEQ is active in remediating contaminated areas where this is appropriate and in correcting the actions that caused the contamination to occur. Due to the widespread occurrence of mercury in Louisiana and the nation, popular fishing areas and many other water bodies statewide have been sampled to determine the extent of risks due to mercury. Procedures developed by the LDH, LDEQ, LDWF and LDAF are then implemented to determine if a risk to human health exists. If it is determined there is a need for a health advisory, press releases are prepared for public dissemination of the information. Advisories are also published in LDWF's annual fishing regulations. However, because this is produced once a year it is likely that new advisories have been established following release of the regulations. The document, "Protocol for Issuing Public Health Advisories for Chemical Contaminants in Recreationally Caught Fish and Shellfish," presents details about how fish advisories are developed in Louisiana.
In addition to fish consumption advisory development and dissemination, LDH, in cooperation with LDEQ, issued a brochure describing how to choose, clean and cook recreationally caught fish and shellfish. The brochure, entitled Eating Recreationally Caught Seafood in Louisiana, describes ways to reduce the potential for consuming hazardous compounds that may be present.
The Tissue Screening Level (TSL) document is a companion document to "Protocol for Issuing Public Health Advisories for Chemical Contaminants in Recreationally Caught Fish and Shellfish." This document provides screening levels for commonly encountered contaminants in seafood tissues. The TSL were developed based on exposure assumptions used in the advisory process. These levels are not intended to be applied as regulatory standards but rather are being proposed as a tool to assist regulated parties in identifying acceptable analytical detection limits for chemicals of concern (COC) in fish/shellfish tissue, evaluating sediment remedial strategies and alternatives, evaluating biomonitoring data, etc.
For more information regarding mercury and other fish consumption advisories contact the LDH hotline at 1-888-293-7020 or call the LDEQ at (225) 219-3189.