Confined Animal Facilities - Groundwater Monitoring

Representative Monitoring

The Central Valley Dairy Representative Monitoring Program (CVDRMP) is a region-wide groundwater monitoring program approved by the Executive Officer as an alternative to individual groundwater monitoring at all dairies. The CVDRMP installs wells and collects and analyzes samples of first-encountered groundwater at dairies chosen as respresentative of other, non-monitored, dairies with respect to features such as herd size, soil conditions, depth to groundwater, pond construction, and cropland management practices.

The goals of the CVDRMP are to:

  •   Examine current groundwater conditions and how they relate to historical operations;
  •   Identify, as possible, past practices and any recent changes to those practices that contributed to currently observed groundwater quality conditions;
  •   Generate results that are applicable beyond areas of monitored dairies (to other non-monitored dairies); and ultimately
  •   Identify practices that are protective of groundwater quality.

There are over 1,100 dairy members of the CVDRMP. Monitoring data are being collected at 42 representative dairies, using 443 monitoring wells.

If you have questions please contact:

Dairy Representative Monitoring Program

Dairy Summary Representative Monitoring Report

Report summarizing the results of representative groundwater monitoring from 2012 through 2018, including an evaluation of current dairy management practices and recommendations for improved management practices.

The original Summary Representative Monitoring Report was submitted on 2 April 2019. A revised Summary Representative Monitoring Report was submitted on 19 April 2019 that includes two corrections regarding cost estimates reflected in Table ES3 on page vi, Table 15 on page 72, and the associated narrative on page 71.

Evaluation of Earthen Liquid Dairy Manure Lagoons

Evaluation of Earthen Liquid Dairy Manure Lagoons in the Central Valley of California: Seepage, Mass Emissions, and Effects on Groundwater Quality (6 April 2017)

Dairy Lagoon Seepage Rates (30 November 2015)
  • Report **NOTE: THIS IS A VERY LARGE FILE AND MAY TAKE TIME TO DOWNLOAD
2014 Dairy Lagoon Perimeter Subsurface Hydrogeologic Investigation (27 March 2015)
Evaluation of Dairy Representativeness (15 May 2013)

Bovine Representative Monitoring Program

Bovine Feedlot Workplans and Well Installation Reports
  • Year 2 Annual Report (2021) - PDF copies are available upon request
  • Year 1 Annual Report (2020) - PDF copies are available upon request