San Francisco Public Utilities Commission: Water, Power, and Sewer

The San Francisco Public Utilities Commission (SFPUC) operates one of the most structurally complex municipal utility systems on the West Coast, delivering drinking water, wastewater treatment, and electric power across a service area that extends well beyond San Francisco's city limits. As a department of the City and County of San Francisco, the SFPUC manages infrastructure valued at billions of dollars and serves both retail customers within the city and wholesale customers across the Bay Area. This page covers the commission's definition, structure, how its three core service areas interact, the tradeoffs embedded in its governance model, and common points of confusion about its authority and accountability.

Definition and scope

The San Francisco Public Utilities Commission is a department of San Francisco city-county government established under the San Francisco City Charter and governed by a five-member commission appointed by the Mayor. Its mandate spans three enterprise divisions: Water, Power, and Sewer. Each enterprise operates as a financially separate unit with its own rate structure, capital program, and regulatory obligations, though all three share administrative infrastructure under a single general manager.

The Water Enterprise delivers drinking water sourced primarily from the Hetch Hetchy Regional Water System — a network of reservoirs, tunnels, pipelines, and treatment facilities extending from Yosemite National Park in Tuolumne County to the Bay Area. The Power Enterprise operates the Hetch Hetchy Power system, which generates hydroelectric power from facilities on the Tuolumne River, and also manages the CleanPowerSF community choice aggregation program. The Sewer (Wastewater) Enterprise operates 3 combined sewer systems, 26 pump stations, and 2 wastewater treatment plants that together process tens of millions of gallons of combined sewage and stormwater daily.

Scope and geographic coverage: The SFPUC's retail water service area covers the City and County of San Francisco. Wholesale water is provided to 26 wholesale customers — municipal utilities and water districts across San Mateo, Santa Clara, and Alameda counties — under long-term agreements. The wastewater system serves only San Francisco's city-county geography. The CleanPowerSF program serves electricity customers within San Francisco. Customers and systems outside these defined service areas are not covered by SFPUC jurisdiction. State-level water rights regulation falls under the California State Water Resources Control Board, not the SFPUC, and federal oversight of Hetch Hetchy facilities falls under the National Park Service and Bureau of Reclamation. Activities, disputes, or service requests involving East Bay MUD, San Jose Water, or other independent utilities are outside SFPUC's operational scope.

Core mechanics or structure

The SFPUC's governance structure separates policymaking from administration. The five-member Commission sets rates, approves major contracts, and adopts capital improvement programs. The General Manager, a civil service executive appointed by the Commission, oversees day-to-day operations across the three enterprise divisions and a set of cross-cutting bureaus including External Affairs, Finance, and Infrastructure.

Water Enterprise mechanics: Hetch Hetchy water originates in the Sierra Nevada snowpack. It flows by gravity through the Early Intake and Cherry Lake diversions into the O'Shaughnessy Dam reservoir in Yosemite, then travels approximately 167 miles via two main transmission pipelines — the Irvington Tunnel route and the Coast Range Tunnel — to the Bay Division Pipelines, which serve the Peninsula and the city. Chloramination and fluoridation are applied before delivery. The SFPUC completed a 10-year, $4.8 billion Water System Improvement Program (WSIP) by 2015 (SFPUC WSIP documentation) to upgrade seismic resilience across this infrastructure.

Power Enterprise mechanics: The Hetch Hetchy Power system operates hydroelectric generating facilities at Moccasin, Holm, and Kirkwood powerhouses on the Tuolumne River, with a combined licensed capacity exceeding 400 megawatts. Power generated flows to city facilities and Hetch Hetchy customers via a transmission network. CleanPowerSF, launched under California Assembly Bill 117's community choice aggregation framework, procures electricity on the wholesale market and delivers it through Pacific Gas & Electric's (PG&E) grid infrastructure under a Distribution Services Agreement.

Sewer Enterprise mechanics: San Francisco's combined sewer system — which carries both stormwater and sanitary sewage in the same pipes — is one of the oldest infrastructure systems in the city. The Southeast Treatment Plant and the Oceanside Treatment Plant together process flows before discharge. The SFPUC's Sewer System Improvement Program (SSIP), a capital investment initiative exceeding $6.9 billion (SFPUC SSIP overview), is the primary vehicle for modernizing this system over multiple decades.

Causal relationships or drivers

Three structural factors drive SFPUC's capital and operational priorities.

Seismic risk is the dominant physical driver. The 1989 Loma Prieta earthquake identified critical vulnerabilities in both the water transmission system and the sewer infrastructure. That event was the direct cause of the WSIP and shapes ongoing SSIP planning, as the city sits within a seismically active region where a major rupture on the Hayward or San Andreas fault could disable service delivery across all three enterprise areas simultaneously.

Regional population growth affects wholesale water demand and wastewater capacity. The 26 wholesale customer agencies serve a regional population in the millions, and growth in Santa Clara and San Mateo counties puts pressure on water allocation decisions governed by the 1984 Master Water Sales Contract between SFPUC and its wholesale customers.

California water law and drought conditions force allocation tradeoffs. The SFPUC holds pre-1914 appropriative water rights on the Tuolumne River (California State Water Resources Control Board), which are senior in priority but subject to regulatory review. Multi-year droughts reduce Hetch Hetchy reservoir storage and require activation of groundwater and recycled water alternatives.

State energy policy drives the CleanPowerSF expansion. California's Renewables Portfolio Standard (RPS), which requires utilities to procure a rising percentage of electricity from renewable sources under Senate Bill 100 (2018), creates a compliance obligation that shapes CleanPowerSF's procurement mix.

Classification boundaries

The SFPUC's three enterprise divisions are legally and financially distinct:

The Commission's authority does not extend to solid waste collection (managed through separate franchise agreements overseen by the Department of the Environment), street maintenance (managed by San Francisco Public Works), or stormwater quality regulation beyond the combined sewer system's municipal separate storm sewer system (MS4) permit.

Tradeoffs and tensions

Rate affordability versus capital investment: The WSIP and SSIP together represent more than $11 billion in capital investment, the costs of which flow through to ratepayers via tiered rate structures. Low-income ratepayers can access the SFPUC's Customer Assistance Program (CAP), but the structural tension between funding infrastructure replacement and keeping rates affordable is a persistent source of Commission debate and public comment.

Hetch Hetchy power revenues versus City General Fund demands: Hetch Hetchy Power serves City departments at below-market rates, effectively subsidizing municipal operations. Expanding the customer base or selling excess power at market rates could increase revenues, but doing so requires navigating PG&E's distribution monopoly and CPUC service territory rules.

Combined sewer system versus separate sewer goals: Separating stormwater from sanitary flows is a recognized long-term environmental goal — it reduces wet-weather overflows into San Francisco Bay — but full separation across the city's 900-mile combined sewer network is estimated to cost far more than the SSIP's current scope. The SFPUC must balance incremental separation against near-term reliability improvements.

Wholesale customer rights versus San Francisco retail needs: The 26 wholesale customers have contractual water rights totaling roughly 184 million gallons per day (MGD) in aggregate entitlement. During droughts, allocating supply between retail and wholesale customers creates legal and political tension that surfaces in arbitration proceedings and state water board proceedings.

Common misconceptions

Misconception: SFPUC is an independent authority separate from city government.
Correction: The SFPUC is a department of the City and County of San Francisco. Its Commission members are appointed by the Mayor and confirmed by the Board of Supervisors. Budget decisions are integrated into the San Francisco annual budget process, and major capital bonds require voter approval.

Misconception: Hetch Hetchy water is unfiltered and therefore not treated.
Correction: The U.S. Environmental Protection Agency (EPA) granted San Francisco a filtration avoidance determination for the Hetch Hetchy system under the Surface Water Treatment Rule (40 CFR Part 141), recognizing source water quality and watershed protection standards. However, the water is chemically treated with chloramine and fluoride before distribution and must still meet all Safe Drinking Water Act standards.

Misconception: CleanPowerSF generates its own electricity.
Correction: CleanPowerSF is a procurement and billing program. It contracts for electricity on wholesale markets and delivers it through PG&E's existing grid. PG&E remains the provider of transmission and distribution services. A customer on CleanPowerSF still receives PG&E wires service and pays PG&E a separate delivery charge.

Misconception: The SFPUC operates the Bay Area's entire water grid.
Correction: The SFPUC operates the Hetch Hetchy system and delivers water to 26 wholesale agencies, but those agencies — including the San Francisco Public Utilities Commission does not manage operations within their local distribution systems. East Bay MUD, Valley Water, and other agencies operate their own separate distribution infrastructure.

Checklist or steps

Steps in the SFPUC rate-setting process (structural sequence):

  1. The General Manager's office initiates a rate study, typically every 4 to 5 years per enterprise.
  2. The rate study analyzes capital needs, debt service projections, operating costs, and reserve targets across a 5-year planning horizon.
  3. Draft rates are presented at public workshops across the service territory.
  4. The SFPUC Commission holds at least one noticed public hearing on proposed rates.
  5. Proposition 218 protest procedures apply: written protest ballots are distributed to ratepayers, and a majority protest can block rate increases for water and sewer services.
  6. The Commission votes on final rate schedules by resolution.
  7. Approved rates take effect no sooner than the period required by Proposition 218 notice timelines.
  8. Rate schedules are posted publicly and filed with applicable state agencies.

Reference table or matrix

Enterprise Primary Water/Energy Source Service Area Key Regulator Capital Program
Water Hetch Hetchy Reservoir (Tuolumne River) SF retail + 26 wholesale agencies CA State Water Resources Control Board; EPA Water System Improvement Program (WSIP) — $4.8B completed 2015
Power (Hetch Hetchy) Hydroelectric — Tuolumne River City departments; Hetch Hetchy customers FERC; CA Energy Commission Ongoing relicensing and transmission upgrade
Power (CleanPowerSF) Wholesale renewable procurement SF electricity customers CPUC (CCA oversight) CleanPowerSF resource portfolio
Sewer/Wastewater Combined sewage + stormwater City and County of San Francisco only CA Regional Water Quality Control Board; EPA (NPDES) Sewer System Improvement Program (SSIP) — $6.9B+

Additional governance context, including how the SFPUC's Commission relates to other appointed bodies, is available on the San Francisco Commissions and Advisory Bodies page. For a broader orientation to San Francisco's municipal structure, the San Francisco metro authority index provides a structured entry point to all city-county departments and services.

References

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