knowground — civic facts for US places

FEMA flood, USGS elevation and FCC broadband for any US ZIP, city or county.

Look up the civic and risk facts for any US ZIP code, city, or county — right from your toolbar. Type a place and knowground shows three point-varying figures: • FEMA flood exposure — the share of addresses in a FEMA Special Flood Hazard Area • USGS ground elevation — the median elevation from the USGS 3DEP model • FCC gigabit broadband — the share of the area where gigabit service is available Every figure is shown next to its parent area — a ZIP compared to its county, a city or county compared to its state — so you can see how a place stands at a glance. The data is drawn entirely from public US government open data: FEMA's National Flood Hazard Layer, the USGS 3DEP elevation model, and the FCC Broadband Data Collection. These are area summaries for information only — not an official flood determination, and not a guarantee for any individual address. Private by design: • No account, no sign-in • No browser permissions — the install screen shows no warnings at all • No cookies, no tracking, and no advertising inside the extension • It reads nothing from the pages you visit — it only looks up the place you type Want the full picture? Open the complete report on www.knowground.com from any result — all the sources, neighborhood detail, and more layers.