OUR MISSION: To provide our customers with high-quality, efficient and reliable water, power and sewer services in a manner that values environmental and community interests and sustains the resources entrusted to our care.
525 Golden Gate Avenue, 13th Floor
San Francisco, CA 94102
T 415.554.3155
F 415.554.3161
TTY 415.554.3488
Date: May 17, 2024
To: C ommissioner Tim
Paulson, President
Commissioner Anthony Rivera, Vice President
Commissioner Newsha K. Ajami
Commissioner Kate H. Stacy
Through: Dennis J. He
rrera, General Manager
Barbara Hale, Assistant General Manager, Power
Michael Hyams, Deputy AGM, CleanPowerSF and Power Resources Catherine Spaulding, Deputy AGM, Programs and Planning
From: Dan Willis, Reg
ulatory and Legislative Compliance
James Hendry, Regulatory and Legislative Compliance
Sandra Hamlat, CleanPowerSF Operations
Colten Krieg, CleanPowerSF Operations
Subject: Annual Report
to the California Energy Commission by Hetch
Hetchy Power and CleanPowerSF on their Sources of Electric Energy and Greenhouse Gas Intensity
Summary
Hetch Het
chy Power and CleanPowerSF will submit their respective Power Source Disclosure reports for calendar year 2023 to the Californ ia E nergy Commission no later than June 3, 2024, as required by statute. 1 The Power Source Disclosure report shows the sources of energy used to meet electric demands as well as the greenhouse gas intensity of each retail electricity product. All Calif ornia retail providers of electric energy are required to use a consistent method to calculate the greenhouse gas intensities of their products.
This memo summarizes the data reports that will be provided to the California Energy Commission.
1 California Public Utilities Code Sections 398.4 and 398.5. for MH
CleanPowerSF
CleanPowerSF provides three electric ity supply products for which separate power source disclosure reports are required:
• Green
• SuperGreen
• SuperGreen Saver
While the energy mixes reported below are final for the SuperGreen and SuperGreen S aver products, the product content for the Green prod uct is estimated. This is due to software problems affecting the Western Renewable Energy Generation Information System (WREGIS), an independent renewable energy generation tracking system for the Western Interconnect ion. WREGIS is California’s renewable energy accounting s ystem of record . The software problems are preventing some power generators from accurately reporting their sales throughout the market . For CleanPowerSF, the software problem is specifically affecting power generators supplying our Green product. As a result, t he Green product figures reported below are prelimin ary based on estimated generation. We anticipate presenting final validated figures in the Attestation of Verac ity for CleanPowerSF’s 2023 Power Source Disclosure Reports and Power Content Label that will be submitted for Co mmission approval in September 2024.
Green
For calendar year 2023, CleanPowerSF estimates the Green product energy mix was:
• 57.7 percent CA Renewable Portfolio Standard Energy Resources 26.8 percent Solar
18 percent Geothermal
10.9 percent Wind
1.1 percent Biomass and Biowaste
0.9 percent Eligible Hydroelectric
• 42.7 percent Greenhouse gas-free hydroelectric generation • 100.4 percent Total Green Product
Staff estimate the Green product’s greenhouse gas intensity was approximately
14.8 pounds of carbon dioxide equivalents per megawatt -hour (CO2e/MWh) of electricity delivered . By comparison, the state- wide average for California in 2022 (latest available data) was approximately 422 pounds of CO2e/MWh.2
2 This number is an average of all load serving entities across California in 2022. This figure was included on the 2022 Power Content Label sent to customers by October 1, 2023. The Power
In its 2022 Integrated Resource Plan, CleanPowerSF established annual renewable energy planning targets to guide procurement activity to achieve a 100 percent renewable supply by 2025. The 2023 target was 63 percent of supply from California Renewable Portfolio Standard eligible renewable energy and 31 percent additional greenhouse gas free hydroelectric resour ces.
According to our estimate, CleanPowerSF e xceeded its target, supply ing 100.4% clean and renewable energy in 2023 (versus a target of 94%). Due to a number of factors including higher than projected SuperGreen product sales , more hydroelectric energy suppli es due to the historically wet winter in California in 2022 to 2023, and historically high Renewable Portfolio Standard eligible renewable energy prices, the estimated Green product power content contains more hydroelectric energy and less Renewable P ortfolio Standard eligible energy than targeted in CleanPowerSF’s 2022 Integrated Resource Plan.
SuperGreen
For calendar year 202 3, Clean PowerSF’s S uperGreen product energy mix was:
• 100 percent CA Renewable Portfolio Standard Eligible Resources 50 percent Solar
50 percent Wind
All SuperGreen generation came from new renewable energy facilities built in California that either first r eached commercial operation since CleanPowerSF began serving customers in 2016 or are located within San Francisco (Suns et Reservoir, which began operating in 2010).
The greenhouse gas emissions intensity of the Super Green product was 0 pounds of CO
2e/MWh.
Content Label allows customers to easily compare the resource breakdown and emissions intensity of their electricity product with the State’s as a whole.
SuperGreen Saver
SuperGreen S aver is a product available for CleanPowerSF low-income customers3 who live in the top 25 percent most disadvantaged communities (DACs)4 in San Francisco. CleanPowerSF’s service terr itory includes 17 disadvantaged community census tracts.
Figure 1. Disadvantaged Community Census Tracts
*Customers living in the census tract on Treasure Island are entirely served by Hetch Hetchy Power, San Francisco’s municipal electric utility, and are therefore not part of CleanPowerSF’s service territory. Image from CalEPA, accessed January 24, 2024
< https://oehha.ca.gov/calenviroscreen/sb535 >
For calendar year 2023, CleanPowerSF’s SuperGreen Saver energy mix was:
• 100 percent CA Renewable Portfolio Standard Eligible Resources 100 percent Solar
SuperGreen Saver gen eration came from a new (less than 15 years old) renewable energy facility built in California and located in a disadvantaged community.
The greenhouse gas emissions intensity of the SuperGreen Saver product was 0 pounds of CO
2/MWh.
3 Low-income eligible customers must be eligible for and enrolled in either the California Alternate Rates for Energy Program (CARE) or Family Electric Rate Assistance Program (FERA). These programs provide monthly discounts on energy for income-qualified customers. 4 Disadvantaged communities are determined as such by the California Communities Environmental Health Screening Tool, developed by the California Environmental Protection Agency’s Office of Environmental Health Hazard Assessment. Commonly known as CalEnviroScreen, the tool is a screening methodology that can be used to identify California communities that are disproportionately burdened by multiple sources of pollution.
Hetch Hetchy Power
Hetch Hetchy Power provides two products for which separate power source disclosure reports are required:
• Hetch Hetchy Power
• Hetch Hetchy Premium
Hetch Hetchy Power
For calendar year 2023, Hetch Hetchy Power’s energy mix was:
• 100% Greenhouse gas-free hydroelectric generation
Hetch Hetchy Power generation came from its Holm, Moccasin, and Ki rkwood hydroelectric power plants meeting 99% of customer needs with the remaining 1% consisting of zero-greenhouse gas hydroelectric power deliv ered by the Western Area Power Administration to serve Treasure and Yerba Buena Islands.
The greenhouse gas emissions int ensity of Hetch Hetchy Power was 0 lbs CO2e/MW.
Hetch Hetchy Power generated Renewable Portfolio Standard -eligible electricity above its retail needs from in-city solar installations, biomass energy from the S outheast Cogeneration Pl ant, and from the Kirkwood hydroelectric facility. This surplus generation, totaling about 40,000 MWh, was sold i nto California's energy markets with Hetch Hetchy Power retaining the associated renewable energy credits. These credits can be used to meet Hetch Hetchy Power’s Renewable Portfolio Standard obligations in future years if needed.
Hetch Hetchy Premium
For calendar year 2023, Hetch Hetchy Premium Service’s energy mix:
• Was 100% Greenhouse gas-free hydroelectric generation; and • Met the requirements of the California Air Resources Board’s (CARB) Low Carbon Fuel Standard Program (LCFS)
Hetch Het chy Premium generation came from the Kirkwood and Moccasin hydroelectric power plants at a ratio of approximately 50% each.
The greenhouse gas emissions intensity of Hetch Hetchy Premium was 0 lbs CO2e/MWh.
This Premiu m service allows the San Francisco Municipal Transport ation Agency, the San Francisco International Airport, and the Port of San Francisco to receive additional credits under CARB’s LCFS program. This progr am rewards these entities that use clean electric energy, instead of fossil fuels, for transportation-related uses.
NEXT STEPS
Attestation of Veracity in September
After the SFPUC’s Power Enterprise and other retail sellers of electricity submit their Power Source Disclosure reports , the California Energy Commission will compile the reports and calculate the state -wide average of energy resources by type and greenhouse gas-intensity. Power Enterprise staff will then develop the CleanPowerSF and Hetch Hetchy Power Power Content Labels that compare the results sum marized here against the state- wide average in 2023.
Power Enterprise staff will post the Power Content Label for each program on the SFPUC’s website. The California Energy Commission requires this to occur by October 1. Power Enterprise staff will also provide the Power Content Labels to our customers by mail by the end of December’s billing cycle.
California Energy Commission regulations require that the Commission attest to the veracity of both the Power Source Disclosure report as well as the Power Content Label by October 1 of each calendar year. As the Power Content Label template will not be available by the June 3, 2024 Power Source Disclosure report submission date, staff are providing this memo advising the Commission and the public of the sources of power for our two programs. Staff will bring two resolutions for the Commission’s approval that will attest to the veracity of the CleanPowerSF and Hetch Hetchy Power Power Source Disclosure reports and Power Content Labels, respectively , to a September 2024 Commission meeting.