Santa Ynez River basin TMDL addressing nutrient pollution
Information
Problem Statement - Surface waters in the Santa Ynez River basin are impaired due to one or more of the following conditions: excessive concentrations of nitrogen compounds such as nitrate, total nitrogen, and un-ionized ammonia, and low dissolved oxygen. These surface waters do not meet the Basin Plan water quality objectives and therefore municipal and domestic water supply, groundwater recharge, and aquatic habitat beneficial uses are not protected.
- Preliminary map of the project area
- Designated beneficial uses of surface waterbodies in the river basin (municipal supply, groundwater recharge, cold freshwater habitat, and agricultural supply).
Documentation
- April 3, 2025 – Approved by US Environmental Protection Agency (documents available upon request)
- May 1, 2024 – Approved by Office of Administrative Law (documents available upon request)
- May 1, 2024 – Concise Summary of Regulatory Provisions
State Board Hearing
- January 17, 2024 – State Board Resolution approving the TMDL
- Agenda
- Comments Summary and Responses
TMDL Documents Available for Public Review and Comment
- June 22, 2023 – Signed Resolution
- Attachment A - Adopted Basin Plan amendment
- TMDL Report
- CEQA Check List and Analysis
TMDL Development Documentation
- June 8, 2023
Notice of hearing Aviso de audiencia publica
Staff report
Attachment 1 – Proposed Resolution and Basin Plan amendment
Attachment 2 - TMDL report
Attachment 3 - CEQA checklist and analysis
Attachment 4 - Notice of opportunity to comment - May 2, 2016 - Meeting Presentation
- April 21, 2016 - Scoping Report to support development of TMDLs addressing nutrient pollution in streams of the Santa Ynez River basin.
- August 4, 2015 - Fact Sheet
- July 21, 2015 - Nutrient pollution: an overview of the problem
- Video - What is a TMDL?
For Additional Information
- Many or all of the documents available on this webpage are presented in a Portable Document Format (PDF). You will need Adobe Acrobat Reader, or similar software, to view these documents. You can download the latest version of Adobe Acrobat Reader, free of charge, by clicking here. Users with visual disabilities can visit the Adobe accessibility webpage here for conversion tools and information to help make PDF files accessible.
Subscribe to our Email Lists
- To be notified of updates and meetings regarding this TMDL please subscribe to the Santa Ynez River basin nutrient TMDL email subscription list
Contacts
- Daniel Ellis
805-549-3889
Daniel.Ellis@waterboards.ca.gov
Status and Public Notices
- Status: Appproved and effective, May 1, 2024
- Report Card (2018)
- Public Notice: None at this time
Approval status
- Central Coast Water Board
- adopted June 22, 2023. - State Water Resources Control Board
- approved January 17, 2024. - Office of Administrative Law
- approved May 1, 2024. - US Environmental Protection Agency
- approved April 3, 2025.
