Data on Mercury in Louisiana
Fish tissue and related mercury data for over 500 locations statewide are available for a variety of species and media (tissue, water, sediment, vegetation). Some locations have periodic data going back to 1994. This data is available by accessing the Louisiana Environmental Data Center, below, under the "Water" and "Mercury" headers. For questions regarding mercury data please contact the Water Planning and Assessment Division.
Additional data for 2017 will be posted as it becomes available.
(Data provided in these spreadsheets is raw data only. Fish consumption advisories based on the data can be found here.)
Fish Consumption and Swimming Advisories
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.
Statewide Mercury Remediation Sites
LDEQ's FY 17 Mercury Budget
|LDEQ FY 17 Mercury Budget|
|Category Description||$ Amount|
|Operating Expenses: Including NEWMOA/IMERC membership||$14,764.02|
|Professional Services: Including lab analysis by University of Louisiana Monroe||$11,700.00|
|Related Benefits: Including retirement, insurance, Medicare, FICA, etc.||$7,150.84|
The Mercury Awareness-Prevention and Protection Video won an American Advertising Federation Gold Addy Award in 2006 in the category of Sales Promotion of Audio/Visual Sales Presentation. This award winning video was produced by Digital FX, Inc., a local Baton Rouge company.
For more information on DEQ's Mercury Initiative please contact Albert Hindrichs, Environmental Scientist Senior, Water Permits Division at 225-219-3189 or email him at firstname.lastname@example.org.