TL;DR
Well grout is the bentonite clay or cement slurry pumped into the annular space between a well casing and the borehole wall, sealing the gap so surface water, septic effluent, and shallow groundwater cannot slide down the outside of the casing into the aquifer. State codes specify the material, minimum depth, often the full casing length or a set distance like the top 20 feet, and placement from the bottom up through a tremie pipe so no voids remain.
What it means
Well grout is the bentonite clay or cement slurry pumped into the annular space between a well casing and the borehole wall, sealing the gap so surface water, septic effluent, and shallow groundwater cannot slide down the outside of the casing into the aquifer. State codes specify the material, minimum depth, often the full casing length or a set distance like the top 20 feet, and placement from the bottom up through a tremie pipe so no voids remain. It is invisible once the well is finished, which is exactly why the grouting record on the well log matters when bacteria keep reappearing in a well that disinfection should have cured.
Where it sits in the glossary
Well grout is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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