Launch the map and click on a fishing site to see which fish were collected and if the concentration of either mercury, DDT, PCB or selenium exceeded an OEHHA consumption restriction guideline. For much more information on these guidelines we suggest you review the fish advisory information published by the State of California.


This question addresses the human health risk of consuming fish caught by recreational anglers at popular fishing locations in the watershed. Hundreds of fish have been collected from eight waterbodies since 2006. The goal of the fish consumption program is to evaluate fish species that are of greatest concern for human consumption in the San Gabriel River Watershed. The data generated from this monitoring effort is providing watershed managers with the information necessary to educate the public regarding the safety of consuming the fish they catch. Fish tissues were collected following guidelines established by OEHHA (2005) using a combination of techniques depending on the water body and included boat drawn seines, hand seines, hook and line, and electro shocking.

You can learn more about fish sampling methods here.