Limitations
What this tool does and doesn't capture. Read this before relying on it for anything consequential.
Coverage is not exhaustive
- State legislation is filtered for precision, not recall. State bills come from LegiScan and are kept only when a data-center term appears in the bill title. Relevant bills that use different wording (for example, "large load," "high-density computing," or a tax bill that quietly includes data centers) can be missed. Assume the state picture is a strong sample, not a complete census.
- Federal rulemakings are scoped to four agencies. The Federal Register feed only pulls from DOE, EPA, FERC, and Commerce. Actions from other agencies (Interior/BLM siting, Treasury tax guidance, etc.) are not included.
- No local or county data. Much data-center siting is fought at the municipal and county level, which no national dataset covers well. None of that is here.
- FERC docket filings are not ingested directly. FERC eLibrary has no usable public API, so individual docket filings aren't pulled. FERC's major actions still appear via the Federal Register.
The relevance score is an AI estimate
Each item is scored 0–100% for how relevant it is to data-center policy by a language model, and items below 40% are hidden by default (toggle "Include low-relevance" on the Bills page to see them). These scores are useful for ranking and filtering, but they are estimates and can be wrong in both directions — a genuinely important item can be under-scored, and an incidental mention can slip through. Topic tags carry the same caveat.
Other things to know
- "State" on the map means different things. For state bills it is the jurisdiction; for federal bills it is the sponsor's home state. The map blends both.
- Comment counts are docket-level. Regulations.gov comment totals count all comments on a rule's docket, matched to the Federal Register document — a good engagement signal, not a per-document count.
- Data refreshes hourly and can lag the source. Newly filed items may take a little while to appear, and status can trail the official record.
- This is not legal advice. Always verify against the primary source (linked on every item) before acting.