Herbicide use in California waters

Well, any of you that are biologists. I have a concern and If you know the answer please post up. The DWR has been using herbicides to kill underwater growth that are chocking our waterways. The question I have is how safe are these herbicides to humans? And are the fish safe to consume? I am not asking for much, am I?  ;D

FYI O'niel Forebay has been sprayed in August this year and I was told it was a 3 year program.

Here is the link to the plan:
The Department of Water Resources Aquatic Pesticides Application Plan

Table of Contents
INTRODUCTION AND LOCATION

TABLE 1. Aquatic Weed and Algal Bloom Control Programs in the State Water Project

PROJECT BACK
GROUND

1. SOUTH BAY AQUEDUCT

2. CLIFTON COURT FOREBAY

3. PATTERSON RESERVOIR

4. DYER RESERVOIR

5. O’NEILL FOREBAY

6. COASTAL BRANCH AQUEDUCT

7. EAST BRANCH AQUEDUCT

8. PYRAMID LAKE

9. CASTAIC LAKE

10. SILVERWOOD LAKE

11. LAKE PERRIS

12. QUAIL LAKE