Blog · September 28, 2026
A Gravity Filter Does Not Certify a Well
Clear water can still fail a lab test.
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Why this comes up
Clear water can still fail a lab test. Test the well. Then decide whether a gravity filter, an RO system, or something else belongs.
What to check on the map first
County GIS lines are assessment maps. They are not a survey, and a product will not redraw them.
Open Platbookmapper and choose the state. The directory sends you to the county viewer. Match the parcel ID before you trust a pin on an aerial photo.
A tool that matches the job
Shop the Water test kit when that is the job in front of you. Test the well. Then decide whether a gravity filter, an RO system, or something else belongs.
The limit
Filter water you hauled from a known tap, or water a lab has already tested. A steel crock does not make creek water safe.
If the line is the real question, call a surveyor. The gear will not answer it.
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey.