What the log tells you
Think of the log as the well’s birth certificate. It records when the well was drilled and by whom, how deep it goes, how it is cased and sealed, what layers of rock and soil the driller passed through, and the flow rate observed when the work was done.
Each line answers a buyer question: age hints at remaining service life, depth and static water level hint at drought resilience, and the seal details speak to contamination protection. None of it is trivia — it all becomes money eventually.
How to get one
Oregon maintains well log records through the state water resources agency, searchable by location. Sellers often have a copy in the house file; if not, I pull logs as a routine part of due diligence on any well property I show.
No log on file is itself information: very old wells and some hand-dug wells predate consistent recordkeeping, which shifts more weight onto present-day testing.
What the log cannot tell you
A log is a snapshot from completion day — possibly decades ago. It does not tell you today’s flow, today’s water quality, or the condition of the pump and pressure system. That is why a current flow test and water quality test ride alongside the log in any smart purchase.
Local rule of thumb: Sellers who can hand over the well log on day one close smoother — buyers read a ready file as a well-kept property.