Find out what's under a California property.
Search any address against the state's oil and gas well database. See every well of record nearby, how far off the record may be, and what it doesn't tell you.
A note on limits. To keep this free and stop automated scraping, we allow one property search per visitor per day. If you need to run more — agents, inspectors, builders and attorneys often do — just reach out and we'll clear your account for higher volume at no charge.
Want this report emailed? COMPLETELY FREE
The full report includes the map, every well within a half mile, and a plain-English guide to what the record does and doesn't establish. Yours to forward to an agent, a lender, or an attorney.
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Every one of these wells is still down there.
The derricks came down. The wells did not. Across California, tens of thousands of wells were sealed and built over — under houses, driveways, schools and apartment towers — using whatever the standard happened to be at the time, and often with no record of when they were drilled at all.
Historical and present-day aerial imagery · Los Angeles, California
Everything the public record says, and what it means
No email required to see your result. We don't hold back the data — it's public, and pretending otherwise would waste your time.
Every well within a half mile
Sortable, searchable, with API numbers, operators, recorded status and distance. All of it, not a teaser.
A real map with error circles
Satellite view with each wellhead drawn alongside the state's own positional error, so you can see what the record can and can't establish.
Plain-English status guide
What plugged, idle and active actually mean, and why "plugged" is a records classification rather than an inspection.
How plugging standards changed
Why a well sealed in the 1930s isn't the same as one sealed today, and what re-abandonment is.
Full methodology
Our source, our download date, how distance is measured, and where the error estimates come from.
What you can do yourself
How to pull well files from the state at no cost, and what to ask a seller in writing. Some of this you don't need us for.
Three steps, about ten seconds
Type the address
Any address in California. We resolve it to a location, then search from there.
We search the state well database
Every well of record within a half mile, measured from the property, with cancelled permits removed so you don't get false alarms.
Read the report
On screen immediately. Email it to yourself if you want a copy to forward to an agent, a lender or an attorney.
The free search reads the database. Some questions need the documents behind it.
Where the record runs out
The state file can't tell you whether a well sits inside your property line, how it was actually sealed, or whether that would satisfy today's standards. Those answers live in well files, historical imagery, and a licensed engineer's judgement.
We'll show our work
A named, licensed engineer
Opinions on well abandonment are signed by a California-licensed petroleum engineer, with the license number on the report.
Stated sources and dates
Every report says which dataset it used and when it was downloaded. No mystery methodology.
Not a government service
We are independent and not affiliated with CalGEM or any agency. The underlying data is public and we tell you how to get it.
We tell you when we don't know
Where the record can't answer a question, the report says so plainly instead of guessing.