Live — NOAA · FEMA · EPA · USGS

Climate risk, one endpoint.

Flood zones, air quality, river gauge levels — normalized, scored, and served as JSON for any US location. No scraping required.

Get API key — free Try the demo

terminal

$ curl https://api.gravelo.io/v1/risk

-H "Authorization: Bearer pk_live_···"

-d "lat=40.7128&lng=-74.0060"

{

"flood": { "zone": "AE", "score": 80 },

"air_quality": { "aqi": 42, "score": 5 },

"river": { "flood_stage_pct": 18, "score": 5 }

}

NOAAFEMAEPA AQSUSGSUpdated daily

Live demo

Try any US address

Enter any US address — or pick one below — to see real climate risk data from the Gravelo API.

Quick picks

Request…

GET https://api.gravelo.io/v1/risk

?address=350 5th Ave, New York, NY, 10118

Responsefetching…

Why Gravelo

The climate data layer
for what you're building.

◎

One endpoint, three hazards

Flood zone, air quality, and river gauge data in a single request. No stitching together three different APIs.

⟳

Updated daily

Pipeline pulls fresh data from NOAA, FEMA, EPA, and USGS every morning. You always get current readings, not stale snapshots.

◈

Normalized 0–100 scores

Every hazard returns a consistent risk score so you can compare flood risk vs air quality without translating between AQI, FEMA zones, and gauge feet.

◻

Built on authoritative sources

FEMA NFHL for flood zones, EPA AQS for air, USGS Water Services for river gauges. The same data used by insurers and governments.

⬡

Raw data included

Every response includes the source-native data alongside the score — FEMA zone code, AQI value, gage height in feet. Use what you need.

◇

Simple auth, clear limits

Bearer token authentication. Rate limits returned in headers. Free tier is genuinely useful — 100 calls/month, no credit card.

Pricing

Start free. Scale when ready.

All plans include all three hazard types. No hidden costs per data source.

Free

$0forever

Try the API. No credit card.

100 calls / month

✓Flood + air + river data
✓JSON responses
✓Community support
✓Rate limit headers

Get API key