Every credit tracked from issuance to retirement on a single verifiable record with public sector validation

Problem

Buying a mitigation or nutrient credit isn’t optional – federal and state law require developers to offset the streams, wetlands, and pollution their projects disturb. Yet Virginia’s market ran on fragmented records. Fewer than 1% of commercial trades had an observable price, the top two nutrient sellers controlled 58% of visible trades, and reliance on stopgap advance credits nearly tripled – strain no one could measure because no one held the full picture.

Solution

Virginia Department of Environmental Quality (DEQ) selected Water Ledger to build SWaN, the Stream, Wetland and Nutrient Credit Exchange, on Hedera. Rather than another broker, SWaN provides one accounting layer – which credits exist, who holds them, what they’ve satisfied – that no single participant owns, yet everyone can trust. Every credit is tracked from issuance to retirement on a single record, with permit and supply data syncing weekly so the ledger reflects live regulatory reality.

Water Ledger’s platform gives us the infrastructure to modernize Virginia’s environmental credit markets while maintaining the highest standards of accountability.

Mike Rolband

Director

A mandatory market with no shared record

When a development project disturbs a stream or wetland, or adds nitrogen, phosphorus, or sediment to a waterway, federal and state law generally require that impact to be offset before the permit can proceed. Restoring equivalent land directly is slow, so the market allows the obligation to be bought instead: mitigation banks restore and preserve land at scale, generating credits that regulators certify, and permit holders purchase the credits they need. For a developer whose project triggers the requirement, buying a credit isn’t a choice – it’s how the permit gets satisfied.

That makes Virginia’s mitigation and nutrient credit market a real, mandatory one, with a combined value of at least $472.5 million between 2021 and 2025. But it was built to be opaque. The Department of Environmental Quality (DEQ) regulates permits and the U.S. Army Corps of Engineers shares authority over stream and wetland banks; each side runs its own administrative system, and neither was designed to show the market that emerges when the two meet. Commercial prices were observable for a fraction of one percent of trades, supply concentrated in a handful of sellers, and no participant could see the whole.

One ledger, tracking every credit end to end

SWaN provides one accounting layer, not several. It records which credits exist, who holds them, and what obligations they’ve satisfied – and it’s that shared record, updated in real time by the legitimate actions of everyone using it, that a trading environment sits on top of. A market can survive high prices, thin liquidity, even sharp disagreement between buyer and seller. What it can’t survive is every party holding its own private version of the same facts, where every dispute becomes an argument about whose records are right rather than what to do next.

On SWaN, every credit is tracked through its full lifecycle, from issuance to retirement, on a single record. Asset owners, the brokers or consultants acting for them, and the regulator all see that same record rather than separate copies. Permit data syncs weekly from DEQ’s CEDS system and supply data syncs weekly from RIBITS, so the ledger reflects current regulatory and supply status instead of a static snapshot filed months earlier. Because that record is anchored on Hedera, it is immutable, independently verifiable, and owned by no single participant – a shared set of facts that is simply what’s there, the same for everyone who looks.

What changes when the facts exist

Within its first six months, SWaN became a key intelligence platform for Virginia’s credit buyers and sellers. In May 2026 it recorded the market’s first confidentially-priced trade – a price that existed and was visible where that had essentially never happened before – and in July 2026 Water Ledger published the first Mitigation & Nutrient Market Quarterly, an analysis built entirely from SWaN’s transaction data.

What changes is what people can now do. A developer facing a mitigation requirement can shop the market instead of sole-sourcing from whichever bank it has always used. DEQ can see a coverage shortfall building in a specific watershed while there’s still time to act, rather than discovering it once projects start missing deadlines. A bank operator can price into a market it can actually see. None of that required a new law or a new permit process; it required the facts to exist somewhere the market could use them. SWaN 2.0 followed in July 2026, extending the same model with deeper intelligence and a recurring Market Quarterly built on a record that grows every quarter the exchange operates.

Why Hedera

SWaN’s whole job is to give asset owners, brokers, and a state regulator one shared, real-time record of environmental credits – so the ledger underneath it has to be neutral, tamper-evident, and dependable in production. Hedera provides that. Its consensus service produces an immutable, independently verifiable record that no single participant controls, which is precisely what turns “whose records are right” into a settled question. Fast finality and throughput let the ledger update continuously as trades occur, while fixed, USD-denominated fees keep costs predictable at scale – a real requirement when you’re running a live market for a government agency rather than a pilot.

For a market that is entirely about environmental credits, Hedera’s carbon-negative footprint also matters: the infrastructure accounting for water quality and habitat restoration doesn’t work against the outcomes it measures. That combination – environmental credibility and enterprise-grade performance – is why development was supported by the Hedera Foundation, and why Hedera was the right foundation for public market infrastructure operating at state scale.