The receipts layer

For press and organisers

Nobody else publishes per-site water and per-site NO_x, SO₂ and PM2.5. Thirty paid vendors were surveyed. The cheapest public price for a site-level megawatt list is $4,900. This layer is free for newsrooms, county staff and community groups.

Take a number

JSON feed

/data/sites.json — modelled water, criteria air, diesel test-hours and the EASIUR–EPA health range for every campus, now and at full build. CORS is open; no key.

One-page briefing

Every site page is a printable card: three-line hook, claimed vs observed water, distance to the 100-ton major-source line, diesel term, citation. Print from the browser.

How to cite

Gigawatt Ledger (2026). Site name: water and air. https://gigawatt-ledger.pages.dev/site/<id>/. Modelled from disclosed capacity; site-level error ±40%.

Embargo

Each quarter we will rank the twenty campuses with the highest modelled NO_x and offer the list first to one outlet. To request Q4 2026, open a GitHub issue tagged embargo.

Download JSON Request the embargo Commercial licence

What this is not

This is not Climate Power’s Data Center Air Pollution Tracker. That product scores eight companies on grid carbon intensity. Gigawatt Ledger reports per-site criteria pollutants — nitrogen oxides, sulphur dioxide and fine particulates — plus water consumed, with on-site turbines and, where the permit was retrieved, diesel backup. CO₂e is shown as a climate number, not an air-quality one.

Licence

Free to quote, embed and republish for journalism, public-interest research, government and community organising, with a link back. Do not scrape this into a paid site-selection or ESG product. For a commercial licence, open an issue.

What to verify before you publish a number

Several figures in the underlying research come from search excerpts or blocked fetches. Before putting a specific tonnage or gallon figure on a front page, check: the EPA benefit-per-ton workbook cells behind $18k / $48k / $420k; Google’s 2024 water volume; the Southaven turbine count (reports conflict between 46, 57, 59 and 69); and the current status of EPA’s PM2.5 standard. The model’s stated site-level error is ±40%.

Gigawatt Ledger · compiled September 2026. Method · York Road Air · Porch Sensor Protocol