Emergency Exemption to Apply Aquatic Herbicides to Waters in the Lahontan Region


SCH Number
Public Agency
California Department of Water Resources (DWR)
Document Title
Emergency Exemption to Apply Aquatic Herbicides to Waters in the Lahontan Region
Document Type
NOE - Notice of Exemption
Document Description
DWR anticipates an impending need to apply aquatic herbicides this year to the East Branch Aqueduct, Silverwood Lake, and Quail Lake to control harmful algal blooms and aquatic weeds that cause negative impacts to public health and safety such as elevated tastes and odors, algal toxin production, clogged filtration systems, and reduced water flows.

Contact Information

Diane Shimizu
Agency Name
California Department of Water Resources
Contact Types
Lead/Public Agency


Los Angeles, San Bernardino

Notice of Exemption

Exempt Status
Emergency Project
Type, Section or Code
Reasons for Exemption
The aquatic herbicide applications will be made this year as needed to prevent an emergency situation by managing these water bodies in a timely and appropriate manner to maintain regular conveyance of water. Aquatic herbicide applications are essential to DWR's ability to meet its public health, safety and welfare obligations of protecting drinking water quality and supply from degradation resulting from elevated tastes and odors, production of algal toxins, clogging filtration systems, and reducing water flows.

Disclaimer: The document was originally posted before CEQAnet had the capability to host attachments for the public. To obtain the original attachments for this document, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613.

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