Bioaccumulation of Pollutants in Fish Tissue

Fish and shellfish are nutritious and good for you to each. But some fish and shellfish may take in toxic chemicals from the water they live in and the food they eat. Some of these chemicals build up in the fish and shellfish - and in the humans that eat fish and shellfish - over time. Although the chemical levels are usually low, it is a good idea to learn about advisories and monitoring in water bodies where you fish, and for fish or shellfish you eat.

Fish Consumption Advisories
Can I eat fish or shellfish caught in my lake, stream or ocean location?

The Office of Environmental Health Hazard Assessment (OEHHA) evaluates contaminant levels in sport fish and issues Fish Consumption Advisories for water bodies in California. Click on the map icon to the left to see an interactive map of current fish consumption advisories issued by OEHHA for specific lakes, rivers or coastal fishing areas. Fish consumption advice is also available for lakes, reservoir, and coastal areas that do not currently have site-specific advice, as well as for fish that migrate.

Contaminant Levels and Long Term Trends in Sport Fish
What are the levels, trands and long-term trends in my lake, stream or ocean location?

Click on the map icon to the left to see an interactive map that allows you to explor fish contaminant data for your favorite fishing locations.

Data are available from extensive monitoring by the Surface Water Ambient Monitoring Program's Bioaccumulation Monitoring Program and from other studies.

Impaired Water Bodies
Which lakes, streams and ocean locations are listed by the state as impaired for fish or shellfish consumption?

Click on the map icon to the left to see an interactive map showing California waters placed on the 2006 impaired Water Bodies list as impaired for uses related fish or shellfish consumption.

Note: an updated version of this map that includes listings from 2010-2016 Integrated Report is under development.

Monitoring Fish and Shellfish for Contaminants at Levels of Concern
Does my lake, stream, or ocean location have fish or shellfish with contaminants at levels of concern?

View the studies conducted by the Bioaccumulation Oversight Group and USGS that identify locations with contaminants at levels of concern.

Water Quality and Exposure Reduction Programs
What is being done to reduce these problems?

Check out the programs that address existing water quality problems affecting the safety of eating fish and shellfish - including programs in which you can get involved to be part of the solution.

FOR MORE INFORMATION: Visit the Bioaccumulation Monitoring Program website for interpretative reports, fact sheets, monitoring plans, and more information about monitoring contaminants in sport fish.