Water-Energy Team of the Climate Action Team (WET-CAT)

Recent News

  • SAVE THE DATE: The Climate Registry will host the second stakeholder outreach workshop for the Water-Energy Nexus Registry on October 11, 2018 at the East Bay Municipal Utility District. Please register for this event here if you would like to attend.
  • The Climate Registry hosted the first stakeholder outreach workshop for the Water-Energy Nexus Registry on June 26, 2018 at the San Diego Foundation in San Diego, CA. See the the California Water-Energy Nexus Registry further information.
  • February 2018: Cal EPA has awarded the contract for the Water-Energy Greenhouse Gas Nexus Registry to The Climate Registry. The contract is for 3 years and work is expected to begin in March 2018.
  • The request for proposal (RFP) for the Water-Energy Nexus GHG Registry has been posted and we expect work to begin in March 2018.
  • Senate Bill 1425 (SB 1425) updates: the California Environmental Protection Agency (Cal EPA) held informational webinars on SB 1425 on May 11, 2017 and June 21, 2017
  • SB 1425 requires Cal EPA to contract with a qualified non-profit to develop a registry of greenhouse gas emissions resulting from the water-energy nexus using the best available data.
  • Cal EPA has drafted a Request for Proposal process and hopes to release the RFP for competitive bid shortly
  • For further information regarding SB 1425, please contact Ryan Radford, Climate Change Advisor, Ryan.Radford@calepa.ca.gov, 916-322-7179


The storage, transport and delivery of water for agricultural, residential, and commercial needs have significant energy and greenhouse gas implications. The Water-Energy Team of the Climate Action Team (WET-CAT) is tasked with coordinating efforts to reduce greenhouse gas (GHG) emissions associated with the energy intensity of water use, and with coordinating how such efforts to reduce the energy intensity of water use can help with efforts to address potential climate change impacts to water. Climate change risks to water include changes in precipitation and runoff impacting both water supply and water quality; diminished snowpack and natural water storage; increased hydrologic variability and extreme events including flood, drought and sea level rise resulting in salinity intrusion; changing water demand; potential for subsidence and reduced flows from intensified groundwater use; potential impacts to drinking water; wildfire and erosion impacting watersheds; thermal changes affecting aquatic habitat; impacts to hydroelectric power generation; potential increases in water-borne infectious diseases; and negative impacts on recreational opportunities and businesses. Some climate impacts are already unfolding in California.

The goal of reducing greenhouse gas emissions associated with the energy intensity of water use is part of a larger suite of water management objectives for the State of California.

WET-CAT focuses on information sharing to inform actions that help reduce the energy intensity of water use.

See the following for background on the water-energy nexus:

Opportunities for Greenhouse Gas Savings in the Water Sector

  • Water Use Efficiency
  • Recycled Water
  • Water Systems Efficiency
  • Stormwater Reuse
  • Renewable Development



John Blue,
Manager of Climate Programs, Cal EPA
(916) 445-9478

Current Roster of Participating Agencies

  • California Air Resources Board
  • California Environmental Protection Agency
  • California Department of Food and Agriculture
  • California Department of Public Health
  • California Department of Water Resources
  • California Public Utilities Commission
  • California Energy Commission
  • California Natural Resources Agency
  • Governor's Office of Planning and Research
  • State Water Resources Control Board
  • Strategic Growth Council

In addition to state entities listed above, regular WET-CAT participants also include, among others, utilities, federal agencies, non-profit organizations, and academic institutions.

Additional Information