Explore Public Environmental Data Near a Home
See what government agencies and mapping volunteers publish near an address in Minnesota and Wisconsin, including Superfund and cleanup sites, storage tanks, wells, water and air quality, high-voltage power lines, data centers, and noise. For information only.
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Radon varies house by house, even on the same street. EPA recommends fixing a home at 4 pCi/L or higher, and says to test every home regardless of county zone.
EPA radon zones Minnesota county data Wisconsin radonNo statewide septic map exists. Records are kept locally, so ask the county or city about permits and inspections.
Minnesota septic info U of M septic programUse the drinking water lookup below the map to find the public water system for an address. Private wells are not tracked that way, so the owner usually tests them.
Find your water report Minnesota Well IndexDrinking water lookup
Find the public water system that serves an address, then check its compliance record and annual water quality report. This shows the utility, not a test of the water at any tap.
Not on a public system? Homes on private wells are responsible for their own testing, and a lab or the county health department can suggest which tests to run. See EPA’s private well guidance and, in Minnesota, the Minnesota Well Index. When buying, ask the seller for the latest water bill or well test and ask the utility for its annual report.
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