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Water Quality Planning Tool
This Water Quality Planning Tool was designed for Caltrans to use applicable water
quality standards while developing strategies for achieving regulatory compliance
with storm water permits.
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Using the tool
The information on water quality is divided in to hydrologic sub-areas (HSAs).
To find a HSA use the HSA name or post-mile of the road in an HSA.
HSA name or number
Post-Miles
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For more information contact
Division of Environmental Analysis, Stormwater Unit
California Department of Transportation
P.O. Box 942874, MS-27
Sacramento, CA 94274-0001
Email:
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