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Fish advisory for Lewiston Lake.

Fish advisory for Anderson Lake (Anderson Reservoir).

Fish advisory for Bon Tempe Reservoir in Marin County.

Advisory based on mercury.

Fish advisory for Lafayette Reservoir based on mercury and PCBs.

Advisory based on selenium.

For information relating to biotoxins from harmful algal blooms (HABs) that may be found in California water bodies, see below.

Fish advisory for East Park Reservoir.

Fish advisory for Lake Nacimiento.

Impervious surfaces impact the hydrology, water quality and aquatic and riparian habitat within a watershed.  OEHHA has developed impervious surface coefficients useful in stormwater management runoff analyses, in watershed assessment as an indicator of watershed health, and in land use planning to identify areas of higher or lower imperviousness and opportunities to reduce impervious cover.

Comment period on the notice of intent to list the chemical, 4-Methylimidazole (CAS No. 822-36-6) as known to the State to cause cancer.