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  "resource": "https://2s.io/api/gov/usgs-water",
  "description": "Real-time water data from USGS NWIS stream / river / groundwater gauges within a bounding box around lat/lon. Returns each site's latest reading per requested variable: streamflow (00060, ft³/s), gage height (00065, ft), water temperature (00010, °C), precipitation (00045, in), and others. Each reading: site code + name, lat/lon, variable name + description + unit, value (or null if no data / sentinel), qualifier codes (e.g., 'P' = provisional, 'A' = approved), observed timestamp. Free public-domain data from waterservices.usgs.gov.",
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          "queryParams": {
            "lat": -90,
            "limit": 25,
            "lon": -180,
            "radius": 0.5,
            "variables": "example"
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                    "description": "Center latitude (decimal degrees).",
                    "maximum": 90,
                    "minimum": -90,
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                  "limit": {
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                    "description": "Max readings to return (1-100). Default 25.",
                    "maximum": 100,
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                    "type": "integer"
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                    "minimum": 0.05,
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                  "variables": {
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    "submitted_at": "2026-09-18T22:00:31.484Z"
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}