Everything You
Need Is Already
There

The operating principle of this series has never been stated explicitly. It should be. Nature has no garbage. Everything that exists is a resource waiting for the right question. This series has demonstrated that principle on the anode side of the battery — contaminated soil, spent filters, industrial waste streams, all of them carrying value the moment someone asked what was inside rather than where to put it. The cathode side of the battery has been waiting for the same question. The answers, it turns out, are in the same place.

Part 7 of this series laid out the cathode problem in full. The elements required to build a lithium iron phosphate battery cathode — lithium, iron, and phosphate — are not exotic. They are not rare. They are not controlled by geology or locked behind Chinese technology. What they lack is not abundance. What they lack is a domestic industrial process that assembles them into battery-grade cathode active material without touching a Chinese refinery.

This piece is about where those materials come from. The answer, for the LFP chemistry that is rapidly becoming the mass-market standard, turns out to be concentrated in one location with remarkable specificity. The Salton Sea in Imperial County, California is simultaneously the largest known domestic lithium deposit in the nation, a century-long accumulation of phosphate from agricultural runoff, and the site of one of California's most persistent and politically visible environmental justice crises.

The lithium is underneath it. The phosphate is in it. The federal mandate to fix both problems already exists. And a California governor — without a single vote from Congress, without a single executive order from Washington — has the legal authority and the policy tools to begin connecting these dots right now.

The Principle Behind the Series

Every piece in this series has arrived at the same structural insight from a different direction. The graphite tariff series documented a $685 per vehicle cost embedded in contaminated American soil. The PFAS series found that the filter solving one environmental crisis becomes the feedstock for a carbon recovery process. The municipal water piece showed that spent infrastructure, written off as a disposal problem, carries industrial value the moment you ask what it contains rather than where to put it.

This is not a coincidence of subject matter. It is a pattern. The United States has systematically misclassified its environmental liabilities as costs rather than assets. The contamination is real. The remediation obligation is real. But embedded inside every one of these problems is a material that someone, somewhere, needs — and is currently buying from China because the domestic version hasn't been extracted from the waste stream it's hiding in.

The Salton Sea is the largest single expression of this pattern in the country. It is an environmental crisis, a public health emergency, an economic development problem, and a federal remediation obligation all in one location. It is also, examined closely, a complete domestic LFP cathode supply chain waiting to be assembled.

What the Salton Sea Contains

The Salton Sea is California's largest lake by surface area — a 316-square-mile body of hypersaline water in the desert of Imperial County, fed almost entirely by agricultural runoff from the surrounding Imperial and Coachella valleys. It has been shrinking for decades as water transfers to San Diego and evaporation outpaces inflow. As the shoreline recedes, it exposes a playa of lakebed sediment laced with a century of agricultural chemistry — pesticides, heavy metals, nitrates, and phosphate. The dust from that exposed sediment is currently causing pediatric asthma hospitalization rates more than double the California state average in surrounding communities.

That is the surface story. Underneath it is a different one.

The geothermal brine beneath the Salton Sea — the same superheated fluid that has been generating electricity at the site since 2012 — contains one of the most concentrated lithium deposits on the planet. The Department of Energy estimates potential lithium production from the Salton Sea Known Geothermal Resource Area may exceed four million metric tons, sufficient to produce more than 10,000 gigawatt-hours of battery capacity. A California Energy Commission study found the site could theoretically produce more than 600,000 metric tons of lithium carbonate equivalent per year at full development — exceeding total global lithium production from all sources as recently as 2020.

The phosphate is less dramatic but equally documented. Salton Sea sediment cores show increasing concentrations of phosphorus in younger layers, reflecting a century of accelerating eutrophication from agricultural runoff. Peer-reviewed research confirms that virtually all of the phosphorus discharged to the Sea still resides within its bottom sediment — bound to calcite that is actively precipitating and concentrating it. The lake is phosphorus-limited at the surface and phosphorus-saturated at the bottom. It has been accumulating this material since 1905 and has nowhere to send it.

Iron is domestically abundant and requires no further explanation. It is the least complicated input in the LFP equation and the one America has never had to worry about.

The Lithium Story: What Is Already Being Built

The lithium extraction story at the Salton Sea is not theoretical. It is underway.

Project ATLiS, operated by EnergySource Minerals, received full permitting in 2021 and a conditional $1.4 billion DOE loan commitment in January 2025. The project uses Direct Lithium Extraction technology — a process that pulls lithium from geothermal brine as it circulates through an existing power plant, extracts the lithium, and reinjects the brine — to produce battery-grade lithium hydroxide at a site that has been generating electricity continuously since 2012. Ford has already secured a long-term offtake agreement for lithium from this project.

The process is genuinely lower-impact than conventional lithium mining. It requires approximately 30 acres of total land footprint. It co-locates with existing geothermal infrastructure. It produces renewable electricity as a primary product and lithium as a value-added byproduct of the same brine circulation. The CO2 emissions profile is among the lowest of any lithium resource type in the world.

The environmental questions are real and deserve honest treatment. Community groups and Earthworks have raised legitimate concerns about water consumption in an already water-stressed desert environment, air quality impacts from project construction, and the distribution of economic benefits to the communities — predominantly low-income Latino agricultural workers and Indigenous tribes — who have been living with the Salton Sea's decline for decades. These concerns are not frivolous. They are the difference between a supply chain solution and a supply chain solution that creates a new environmental justice problem in the same ZIP code as the old one.

The answer to those concerns is not to stop the extraction. It is to design the extraction so that the community that has absorbed the cost of the Salton Sea's decline receives a proportionate share of the value created by its recovery. That is a solvable policy problem. California already has the legislative framework — the lithium excise tax, the Salton Sea Management Program, the environmental justice requirements embedded in state permitting law — to make it solvable.

The Phosphate Story: What Nobody Has Connected Yet

The phosphate story is different. Nobody is building it yet. Nobody has publicly connected it to the LFP supply chain problem. This is that connection.

Battery-grade purified phosphoric acid is an emerging bottleneck in global LFP production. The IEA projects a purified phosphoric acid deficit as early as 2030. China currently controls approximately three-quarters of global PPA production. An American LFP cathode industry — one that could actually claim the 45X manufacturing credit without routing through Chinese processing — needs a domestic phosphate source and a domestic purification pathway.

The Salton Sea lakebed contains phosphate in documented, measured concentrations, accumulated over more than a century of continuous agricultural runoff. It is currently classified entirely as a pollution problem. The dust it generates when the lakebed dries and the wind picks it up is a public health crisis. The phosphate dissolved in the water column is driving the hypereutrophication that kills fish and creates algal blooms. Every environmental review of the Salton Sea treats phosphate as something to be removed, reduced, or controlled.

The reframe is simple. The phosphate is not a waste product to be managed. It is a raw material to be recovered. Phosphate recovery from wastewater and sediment is established industrial chemistry — the same hydrometallurgical processes used in fertilizer production and municipal wastewater treatment can be adapted to extract and purify phosphate from Salton Sea sediment. The purification pathway from recovered phosphate to battery-grade phosphoric acid exists. What does not yet exist is the imagination to do it.

This is not a solved problem. The phosphate in Salton Sea sediment is mixed with heavy metals, organochlorine pesticides, and other agricultural contaminants that would require separation before the phosphate could be upgraded to battery grade. That separation chemistry is real work. The capital cost of a phosphate recovery and purification facility is real money. The timeline from concept to battery-qualified material is measured in years, not months.

But the feedstock is there. It is sitting in the mud of a shrinking lake in a community that desperately needs the economic activity. And the federal government already has a mandate to spend money remediating that lake — money that could be structured to fund recovery rather than just disposal.

The Full Sourcing Picture: Honest About the Gaps

The Salton Sea provides lithium and a path to domestic phosphate. It does not provide nickel, cobalt, or manganese — the transition metals required for NMC cathode chemistry. For those, the honest answer is Canada.

Vale's operations in Sudbury, Voisey's Bay, and Thompson produce nickel sulfate from Canadian ore under existing agreements with GM. Glencore's Ontario and Quebec operations produce cobalt as a byproduct of nickel mining. Both are FEOC-compliant under the USMCA framework — not Chinese, not Russian, not subject to the adversarial nation designation that triggers FEOC exclusion. They do not qualify for the 45X manufacturing credit, which requires production on American soil. But they provide a clean supply chain bridge while domestic refining capacity is built.

Manganese remains the hardest problem. The USGS states explicitly that the United States has essentially no known manganese resources of suitable extraction grade. China controls 95% of global battery-grade manganese sulfate production. There is no elegant solution here yet — and PolicyTorque is not going to manufacture one for the sake of a complete answer.

Before we arrive at manganese, one observation worth planting for a future piece. The Salton Sea's phosphate accumulation is the downstream result of a century of unfiltered agricultural drainage. Every farm tile drain in America is currently discharging phosphate, heavy metals, and agricultural chemistry directly into the watershed. Crushed limestone and dolomite — among the most abundant and cheapest industrial minerals on earth, running roughly $10 to $20 per ton at the quarry — are documented sorbents for phosphate, cadmium, lead, copper, and arsenic. A designed calcite filter bed at the base of agricultural drainage, sized and positioned to intercept tile drainage before it reaches the ditch, would bind those materials for periodic harvest rather than dispersing them through the watershed. The Salton Sea lakebed is what happens when you run a continent of agricultural drainage through a calcite basin for a hundred years without harvesting what accumulates. The question worth asking is whether the bottom of every American farm should have a small, inexpensive calcite filter designed not just to protect the watershed — but to collect what the watershed has been carrying all along. That is a different series. It is noted here because the principle is the same one running through this entire body of work: nature has no garbage.

The honest position is this: the global manganese supply chain is in serious flux. South African and Australian processing investments are advancing. LMFP chemistry — which adds manganese to the standard LFP formula to increase energy density — is emerging as a potential successor to standard LFP, which would increase manganese demand further, not reduce it. Chinese export restriction risk on manganese is real and is accelerating non-Chinese investment in processing capacity. The landscape that exists today is likely to look materially different in six to eighteen months. Forcing a definitive domestic manganese solution onto the page right now would be premature analysis dressed up as policy insight. By the time Governor Newsom's office reads this article, the solution may have already presented itself. Manganese deserves its own piece, written when the landscape has settled enough to say something true about it. That piece is coming. This one doesn't need to wait for it.

What California Can Do Without Washington

Here is the part of this analysis that is different from everything else written about the domestic battery supply chain. The federal government is not a prerequisite.

California has a governor who has publicly committed to the EV transition, who has called Imperial Valley "Lithium Valley" for three years, who presides over the world's fifth-largest economy, and who has the legal authority under existing state law to initiate most of what this article describes. The Salton Sea Management Program exists. The lithium extraction excise tax exists. The California Infrastructure Bank exists. The state's clean energy procurement authority exists. The environmental justice framework exists.

What a California governor could initiate without a single federal vote:

Direct the California Energy Commission to commission a feasibility study on phosphate recovery from Salton Sea sediment as a battery-grade material input — not as a remediation project, but as a critical minerals project with remediation benefits. Frame it correctly and the federal critical minerals designation, which does not require congressional action, follows automatically.

Structure the lithium excise tax revenue so that a defined percentage funds lakebed remediation activities — including pilot-scale phosphate recovery — rather than dispersing it in the general fund. The communities of Imperial County have been subsidizing California's agricultural economy with their health for decades. The lithium under their feet should pay for cleaning up the phosphate on top of it.

Use California's state EV procurement authority to offer conditional offtake agreements for domestically-sourced LFP cathode material — creating the demand signal that private capital needs to finance the first commercial phosphate recovery facility. No subsidy required. A purchase commitment from the state's own fleet electrification program is sufficient to de-risk the first mover.

Convene the supply chain. The lithium producer, the phosphate recovery developer, the iron supplier, the CAM manufacturer, and the OEM battery qualifiers are not sitting in the same room. A governor's convening authority costs nothing and can accelerate by years the timeline for a supply chain that the market will eventually build anyway.

None of this requires the current administration in Washington. None of it requires a cooperative Congress. It requires a governor who has read this article and understands that the supply chain California's EV mandate depends on is sitting in a lake in Imperial County, waiting for someone to ask the right question about what's in the mud.