The Town is required by the National Pollutant Discharge Elimination System (NPDES) Permit for the Joint Wastewater Treatment Plant to expand the recycled water system by December 2013. The Town has hired GHD, Inc. to prepare a Feasibility Study / Master Plan, environmental documents, and bid documents to construct new pipelines to potential new customers. The attached flier describes the Recycled Water Project.

Click to view flier summarizing proposed Recycled Water Project [PDF]

The following fact sheet has information about the anticipated acerage of vineyard irrigated with recycled water, storage volumes in vineyard ponds, and the volume of recycled water delivered to vineyard customers:

Click to view flier summarizing recycled water used for irrigation purposes [PDF]

On June 12, 2012 the U. S. Bureau of Reclamation and the Town of Yountville released a Draft Environmental Assessment/Initial Study-Proposed Mitigated Negative Declaration (Draft EA/IS-Proposed MND) for the Town of Yountville Recycled Water Expansion Project, which can be viewed at the link below.

Yountville Draft Recycled Water Project EA/IS-MND  6-15-12  [PDF]

A Final Mitigated Negative Declaration (FMND) was prepared and it was adopted by the Town Council Agenda on 8/7/12. The FMND includes responses to comments on the Draft EA/ IS - Proposed MND, revised mitigation measures, and a Mitigation Monitoring and Reporting Plan.

Yountville FINAL Recycled Water Project MND [PDF]

On June 15, 2012 the Town submitted the “Draft Feasibility Study and Facilities Planning Report” to the U. S. Bureau of Reclamation and State Water Resources Control Board as part of the request for federal construction grant funding and state loan financing, respectively. The document can be viewed at the link below.

Yountville Draft Feasability and Facilities Planning Report [PDF]

On March 23, 2012 the following Recycled Water Rate Study was completed and describes the current and proposed rates for purchasing recycled water. The Rate Study also describes project alternatives, potential users, project funding options, and the approach to structuring the rates.

Recycled Water Rate Study – 2012 [PDF]

The following paper and presentation are a summary of the existing recycled water system, proposed project alternatives, and potential rates that may be charged for recycled water. This presentation was made at the WateReuse California Annual Conference on March 27, 2012.

Paper: Economics of Sustainable Water Reuse In The Napa Valley [PDF]

Presentation: Economics of Sustainable Water Reuse In The Napa Valley [PDF]


Recycled Water Program Manual & Notice of Intent 

The Town of Yountville has been moving towards maximizing the reclamation of highly treated wastewater through the Recycled Water Program. The Recycled Water Program Manual that lists the current recycled water users as well as the operating procedures/terms for usage and distribution of the Towns recycled water. Appendix A contains the user agreements for the purchase and sale of reclaimed water. Appendix B contains forms and applications that may be required by the Town to purchase and use recycled water. Appendix C contains the cross-connection control program. Appendix D contains the California Regional Water Quality Control Board requirements for recycled water.  Appendix E contains the recycled water program engineering report. 

Recycled Water Manual and Notice of Intent

Appendix A

Appendix B

Appendix C

Appendix D

Appendix E

Feasability Report

In 2005, the Town prepared a Feasibility Study for the upgrading of the Wastewater Treatment Plant to provide Title 22 unrestricted recycled water through tertiary treatment and to expand the recycled water distribution system. In 2010, the Town completed a $1.2 million upgrade project. In 2011, the Town will plan for the expansion of the recycled water distribution system by preparing a feasibility study and applying for grant funding. It is anticipated that the environmental document will be completed in 2012 and construction will be completed in 2013.

Feasability Report


Mixing Zone Study

The following report is the "Effluent Mixing Zone / Dilution Credit Study" that was the basis for the requirments listed in the NPDES permit for the Joint Treatment Plant discharges to the Napa River.

Part 1 - Table of Contents & Introduction

Part 2 - Methods for Delineating the Mixing Zones

Part 3 - Data Assessment and Model Input Values

Part 4 - Simulation Results

Part 5 - Compliance Assessment and Feasibility Analysis

Part 6 - List of Tables & Figures

Self Monitoring Reports

The following “Self Monitoring Reports” from 2007 through 2010 include information about daily flow rates and water quality data.

2011 Self Monitoring Report

2010 Self Monitoring Report

2009 Self Monitoring Report

2008 Self Monitoring Report

2007 Self Monitoring Report