Live flow from 2,400+ USGS and state streamgages across the United States, normalized to one dashboard and API — with monitors that email or text you the moment a river crosses your threshold or starts behaving strangely.
Search 2,400+ USGS and state streamgages across the United States by river, station, or state. Open any gage to see today's flow, the last 7 days of readings, anomalies, and its spot on the map — free, no sign-up.
Streamgage readings drive diversion timing, fish passage assessments, municipal supply monitoring, and research models. The data is public, but it lives in silos — USGS NWIS and water-district dashboards — each with a different format, URL, and refresh cadence.
GageLog ingests every supported gage on a fixed schedule, normalizes readings to a single schema, and exposes them through a consistent API and dashboard.
Put a monitor on any tracked gage. Threshold monitors fire when flow crosses a level you set — above or below. Anomaly monitors watch for statistical outliers and sudden spikes, no threshold required.
Alerts arrive by email or text the moment a reading enters the condition, then stay quiet until flow leaves and re-enters it — with a cooldown, so one restless gage never floods your inbox.
Set up your first monitorWater utilities, hydrologists, irrigators, conservation teams, and researchers. Track one gage or several hundred. Readings at 15-minute resolution; export when you need the raw data.
USGS NWIS and publicly available state sources across the United States. Every supported gage ingested on the same schedule, normalized to a common schema — some with live cameras.
Pick any date range, any interval. Rolling averages, daily summaries, water-year and year-over-year comparison, flow-duration curves, and anomaly detection.
Threshold and anomaly monitors on any tracked gage. Email or text the moment one fires, with hysteresis and cooldowns so alerts stay meaningful.
Excel and CSV export with derived columns, plus a documented REST API. Drop readings straight into a spreadsheet, notebook, or your own pipeline.
Browse live gage data with no sign-up, or create an account to track gages, compare flows, and get alerts.