As of October 2026
Coverage and methods.
Every number on this site is defined here: what it counts, where it comes from, and what it leaves out. When a number on another page and this page disagree, this page is the one to trust, and the other is the one we fix.
01
The record
About 22 million documents, as of October 2026: permits and permit applications, agency correspondence, enforcement actions, deviation reports (reports that a permit condition was not met), monitoring reports, and the regulations they cite, from the agencies listed below and from federal sources.
What counts as one document: one file as the agency published it, counted once. A revised filing is a new document; a file that appears in two agency systems is counted once.
How fast it grows: about 10,000 documents on an average day, measured over the days the count is checked; documents are indexed as the agencies file them, usually the same day.
How a document is tied to a place: by the identifiers the agency assigns to the facility, the permit, the emission point, or the outfall, so a question can be asked about one stack and answered from the documents that govern it.
Left out: anything the agency has not published online, confidential business information the agency withholds, and the states not listed below.
02
Where
Agency records in the brain: 20 states and 2 provinces.
- Alabama
- Arkansas
- California (in part)
- Connecticut
- Florida
- Georgia
- Illinois
- Indiana
- Iowa
- Kentucky
- Louisiana
- Michigan
- Missouri
- Nevada
- New York
- Ohio
- Pennsylvania
- Tennessee
- Texas
- Washington
- Alberta, Canada
- Ontario, Canada
Plus federal sources, which apply in every state. "In part" means some of that state's agency systems are indexed and others are not yet.
Every facility mapped and the automated work running: Texas and Louisiana.
"Every facility" means every facility the state agency lists in its own registry of permitted sites, each with its boundary, its permitted emission points and outfalls, the limits the permit sets for them, and the satellite view. Other states follow; the order depends on where the people who use the system work.
Your state not listed?
The federal rules, which most state programs carry out, are in the brain in full, and much of the equipment and compliance work is the same from state to state. A state-specific conclusion still needs that state's own sources. Ask us where your state is in the order.
03
Live feeds
Six feeds are connected. The ones named here are read as they update; a feed's own timestamp travels with the reading.
- AirNow
- Ambient air quality, from the EPA and state monitors.
- National Weather Service
- Weather observations and forecasts, including flood forecasts.
- USGS stream gauges
- Stream flow and stage at gauges near mapped facilities.
- EPA ECHO
- Federal enforcement and compliance history by facility.
- Two more
- Named here once confirmed.
On dates: a monitoring report retrieved today can describe a period measured months ago. Where it matters, an answer carries three dates: the period measured, the date the agency published it, and the date EnviroAI read it. Each cited document shows its agency date.
04
What a result is
An answer is written from the documents it cites, and shows them. Check the sources before you act; it is built so you can.
A permit draft is a first draft. Every value the system could not confirm is marked for a person to fill, not guessed.
A screening result from the air model (AERMOD, the model the EPA and the states use for permits, run in three dimensions over the plant) says whether a modeled concentration is under the state's screening level. It is not an agency approval. A person reviews the run and signs the submittal.
A watch lists the agency filings that mention what you asked it to watch, with the filing's own date. It is only as current as the agency's publication.
Corrections to anything on this page: write to us. The date at the top changes when the numbers do.