USGS Water monitoring sites
List USGS NWIS monitoring sites. Filter by US state, site type, bounding box, parameter code, or data-type availability. Returns site metadata including location, altitude, and hydrologic unit code. Dual-path: legacy WaterServices primary, OGC API fallback.
Query parameters
2-letter US state code.
2-letter US state code.
Site type(s) comma-separated (ST=stream, LK=lake, GW=well, SP=spring, OC=ocean, ES=estuary, AT=atmosphere, FA=facility, AG=aggregate).
Site type(s) comma-separated (ST=stream, LK=lake, GW=well, SP=spring, OC=ocean, ES=estuary, AT=atmosphere, FA=facility, AG=aggregate).
Bounding box 'minlon,minlat,maxlon,maxlat'.
Bounding box 'minlon,minlat,maxlon,maxlat'.
Parameter code filter (5-digit).
Parameter code filter (5-digit).
Filter sites by data-type availability (iv|dv|sv|pk|gw|qw|aw).
Filter sites by data-type availability (iv|dv|sv|pk|gw|qw|aw).
Maximum number of sites to return.
Maximum number of sites to return.
Response
List of USGS monitoring sites with location and classification metadata.
Example response
{
"meta": {
"endpoint": "/api/v1/fred/us/cpi",
"data_time": "2026-04-16T14:30:00Z",
"response_time": "2026-04-16T14:30:12Z",
"provider": "Sugra API v1.0.1",
"source": "sugra_crypto",
"attribution": "Short interest and Reg SHO daily short volume data is owned by and sourced from FINRA (Financial Industry Regulatory Authority).",
"fallback_chain": [
"sugra_crypto",
"sugra_finance"
]
}
}