Blog · September 28, 2026
Gravity Filter and a Cistern
A cistern holds roof water. It is still not lab-tested water.
Platbookmapper is an Amazon Associate. If you buy through an Amazon link on this page, we earn a commission. The link is a product, not the county map.
Why this comes up
A cistern holds roof water. It is still not lab-tested water. Filter for taste and sediment only after you know what the cistern test said.
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 Gravity water filter when that is the job in front of you. Filter for taste and sediment only after you know what the cistern test said.
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.
The county viewer is the map. The product is only the tool you carry.
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.