Overview
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.
Details
- Version0.1.0
- UpdatedJuly 15, 2026
- Offered byKnowGround
- Size673KiB
- LanguagesEnglish (United States)
- Developer
Email
privacy@knowground.com - Non-traderThis developer has not identified itself as a trader. For consumers in the European Union, please note that consumer rights do not apply to contracts between you and this developer.
Privacy
knowground — civic facts for US places has disclosed the following information regarding the collection and usage of your data. More detailed information can be found in the developer's privacy policy.
knowground — civic facts for US places handles the following:
This developer declares that your data is
- Not being sold to third parties, outside of the approved use cases
- Not being used or transferred for purposes that are unrelated to the item's core functionality
- Not being used or transferred to determine creditworthiness or for lending purposes
