Arizona Well Data · Well logs
Arizona well logs
Every time a well is drilled in Arizona, the driller files a completion report — the well log — with the Arizona Department of Water Resources well registry. We hold 240,580 of them and rebuild this index weekly, so you can find one by address instead of by record number.
✓ Verified against ADWR · 2026-10-12
Well logs are filed by location, not by house number. Enter any Arizona address and we'll pull the recorded wells around it — every live Arizona well registration carries a mapped location. The registry does record a mailing address, but it is the owner’s contact address rather than the well site — often a PO box or an out-of-state address — so wells are found by location rather than by house number.
Free address lookup Full property report — $49What's in a Arizona well log
Not every filed report carries every field — older logs are thinner, and what the state captured changed over the decades. This is the actual coverage across all 240,580 records, so you know what to expect before you look anything up.
| Field | What it tells you | Records with it | Coverage |
|---|---|---|---|
| Mapped location | Coordinates, so the log can be found by address instead of by record number. | 239,767 (100%) | |
| Total depth | How deep the hole was drilled, in feet. | 200,284 (83%) | |
| Static water level | How far below the surface the water stood at rest. | 176,804 (73%) | |
| Date completed | When the well was finished and the log filed. | 174,107 (72%) | |
| Tested yield | Gallons per minute the well produced on the driller’s pump test. | 97,689 (41%) |
When Arizona's wells were drilled
Dated logs by decade of completion (174,107 of 240,580 records carry a usable completion date). The shape of this chart is mostly the history of the filing requirement, not of drilling — thin early decades mean the logs weren't kept, not that nobody drilled.
| Decade | Logs filed | |
|---|---|---|
| 1860s | 5 | |
| 1870s | 30 | |
| 1880s | 112 | |
| 1890s | 116 | |
| 1900s | 597 | |
| 1910s | 812 | |
| 1920s | 814 | |
| 1930s | 1,791 | |
| 1940s | 4,179 | |
| 1950s | 6,762 | |
| 1960s | 9,253 | |
| 1970s | 17,898 | |
| 1980s | 30,690 | |
| 1990s | 42,206 | |
| 2000s | 37,717 | |
| 2010s | 13,517 | |
| 2020s | 7,608 |
Three ways to find a well log here
- By address — the free lookup maps an address to the wells recorded around it. This is what most people want: "how deep is the well on the place I'm buying."
- By county — each county page carries the median depth, water level and yield computed from every log filed there, plus the drillers working it.
Well logs by county
Where these records come from
All of it is public record from the Arizona Department of Water Resources well registry, the state's official record of every well drilled and registered in Arizona (new.azwater.gov/wells). We don't hold anything the state doesn't publish. More on that database and what a filed record carries: ADWR well records. What we add is that the records are indexed by location, the statistics are computed the same way in every county, and the whole thing is refreshed weekly. Our filters and the exact computation are on the methodology page (statistics use ADWR registered wells, excluding the 51,744 registrations the department has cancelled; depths 0-5,000 ft).
Common questions
Yes. Arizona drillers are required to file a completion report for each well, and those reports are kept by the Arizona Department of Water Resources well registry. Anyone can look them up. This site is an independent index of that public record — we re-read the source and recompute every page weekly.
Well logs are filed by location, not by street address, so you search the map rather than a house number. Enter the address on our free lookup and you'll see the recorded wells around that spot — every live Arizona well registration carries a mapped location. The registry does record a mailing address, but it is the owner’s contact address rather than the well site — often a PO box or an out-of-state address — so wells are found by location rather than by house number. Each one shows its depth, static water level, tested yield.
The oldest dated log in our copy was completed in 1860; the newest is from 2026. Coverage thins out the further back you go — older wells were often never filed, and filing requirements tightened over time.
Most likely it was never filed. Wells drilled before the state's reporting requirement — and hand-dug or unpermitted wells — have no log at all. It also happens that a log exists but its recorded location is off, in which case it will show up under a neighboring property. Neither is something we can fix from the source data, and we'd rather say so than invent a record.
The useful parts for a buyer or a homeowner: how deep the well is, how high the water stands in it, how many gallons per minute it produced when tested, what the driller hit on the way down, and who drilled it. Together those say whether the well is likely to keep producing and what a replacement would cost.
The property report pulls every recorded well near an address — depths, water levels, yields, drillers — as one printable summary for due diligence.
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