Welcome to the California Regional Water Quality Control Board, Central Valley Region Welcome to the California Environmental Protection Agency

Central Valley Pesticide TMDL and Basin Plan Amendment - Water Quality Criteria Method Development

Public Comments on Phase I and II reports.

Phase II report

The Phase II report details a method to derive pesticide water quality criteria for the protection of aquatic life. The report also includes a derivation of water quality criteria for chlorpyrifos using the methodology. The Phase II Peer Review Addendum describes the peer review process and provides the peer review comments and the responses to those comments. For additional information, please contact Paul Hann at (916) 464-4628 or by e-mail at phann@waterboards.ca.gov.

Phase I report

The Phase I Method Evaluation Report provides a comparison and evaluation of existing water quality criteria derivation methodologies from around the world. The Phase I Peer Review Addendum describes the peer review process and provides the peer review comments and the responses to those comments. For additional information, please contact Paul Hann at (916) 464-4628 or by e-mail at phann@waterboards.ca.gov.

UC Davis Contract, Scope of Work, 42 KB, PDF (PDF info)
Provides the scope of work for the contract between the Central Valley Water Board and UC Davis to perform research into potential methods to establish numerical water quality criteria that can be used as the basis for pesticide water quality objectives in the Central Valley. For additional information, please contact Paul Hann at (916) 464-4628 or by e-mail at phann@waterboards.ca.gov.

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--Web page updated 08/16/2007