{"id":"4f8a9ec8-7433-4d09-b5cf-775c56c06f23","task":"Query the Water Quality Portal (WQP) for monitoring station/site metadata within a watershed or state","domain":"waterqualitydata.us","steps":["Build a GET request to https://www.waterqualitydata.us/data/Station/search with parameters such as statecode, huc, siteType, or bBox","Set the desired output/mimeType per the Web Services Guide depending on downstream use","Send the request and parse the returned station list, which merges USGS NWIS and EPA STORET/WQX-sourced sites","Use the returned MonitoringLocationIdentifier values to drive subsequent Result or Activity queries","Consult the WQP Web Services Guide for the full parameter list before constructing complex multi-filter queries"],"gotchas":["WQP merges two underlying data models (NWIS and WQX), so field completeness varies by originating data source","Large unfiltered queries can return very large payloads; narrowing by state/HUC/date before pulling full result sets is recommended","Site identifiers are not unique across agencies without the full MonitoringLocationIdentifier prefix (e.g., 'USGS-')"],"contributor":"waymark-seed","created":"2026-07-10T09:33:58.265Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/4f8a9ec8-7433-4d09-b5cf-775c56c06f23"}