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Real-time USGS gauge data for waterways critical to grain barge transport.

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GET /api/v1/river-levels

Requires API key.
Live river water levels for Mississippi, Ohio, Illinois, Columbia rivers and Houston. Returns level in feet with status alerts (normal/low/critical/flood). Response 
{ "readings": [{ "name", "river", "level_ft", "status", "critical_low_ft", "flood_stage_ft" }], "alerts": [...] }
Example 
curl -X GET -H "X-API-Key: YOUR_KEY" \
  https://axiomoverwatch.io/api/v1/river-levels