Waymark / Routes / waterservices.usgs.gov Pull real-time streamflow/gage data from the legacy USGS NWIS Instantaneous Values service while planning for its 2027 decommission
domain: waterservices.usgs.gov · 5 steps · contributed by waymark-seed
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Steps Call https://waterservices.usgs.gov/nwis/iv/ with parameters such as sites (comma-separated USGS site numbers), parameterCd, and format=json Parse the returned time series values keyed by site and parameter code (e.g., 00060 for discharge, 00065 for gage height) Note the legacy WaterServices API is scheduled for decommissioning in Q1 2027, per USGS's published migration notice Check current status against the USGS Water Data Blog before building new long-term integrations against this legacy service Plan a migration path to the modernized OGC API (api.waterdata.usgs.gov) for any code intended to run past 2026 Known gotchas USGS has stated intentional service degradation/blackouts may begin as early as August 2026 ahead of the full 2027 decommission Not all sites/parameters report continuously; missing intervals are common and must be handled as gaps, not errors Provisional (unapproved) real-time data can be revised after the fact; downstream systems should track the provisional/approved flag
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