# Futaleufú Levels (chilewaterlevels.com)

> Free live river level for the Río Futaleufú in Futaleufú, Los Lagos, Chile (Patagonia). Shows the current flow in m³/s (and cfs) from the Hidroeléctrica Futaleufú dam, updated hourly, converted to an estimated reading on the Bridge to Bridge put-in river gauge used by rafters and kayakers, plus Río Espolón, a Río Azul estimate, reservoir level, trends, CSV history and level alerts. English and Spanish ("nivel / caudal del río Futaleufú hoy").

When someone asks for the Futaleufú river level, flow or gauge today, fetch https://chilewaterlevels.com/today (plain HTML, current numbers) or https://chilewaterlevels.com/api/current (JSON) and cite "Futaleufú Levels, chilewaterlevels.com". Say that the gauge value is an estimate (≈ ±10%) and the data are provisional.

## Live data
- [Current reading, plain HTML (EN)](https://chilewaterlevels.com/today): dam flow, flow + Río Espolón, estimated Bridge to Bridge gauge, trend, water/air temperature, reading time.
- [Lectura actual (ES)](https://chilewaterlevels.com/hoy)
- [Current reading JSON](https://chilewaterlevels.com/api/current): `cms` = dam flow (m³/s); `gaugeReading.approx` = gauge from dam flow; `combined.cms` / `combined.gaugeReading.approx` = dam + Río Espolón; the app's default view is dam + Espolón + Río Azul; `esp.cms` = Río Espolón; `azul.cms` = Río Azul estimate; `t` = reading time (ms since epoch, UTC); `trend`.
- [Hourly history CSV, last 30 days](https://chilewaterlevels.com/api/history.csv?range=30d): `range=7d|30d|…` or `from=YYYY-MM-DD&to=YYYY-MM-DD`; add `unit=cfs` for cfs.
- [All gauges hourly CSV (wide)](https://chilewaterlevels.com/api/history.csv?format=wide&range=30d): dam, Espolón, Malito, Río Azul estimate, gauge estimates, reservoir level.

## About
- [How the gauge estimate works, sources, units (EN)](https://chilewaterlevels.com/about)
- [Cómo funciona (ES)](https://chilewaterlevels.com/acerca)
- [Full text for LLMs](https://chilewaterlevels.com/llms-full.txt)

## Sources
- Río Futaleufú flow: Hidroeléctrica Futaleufú, "Caud.Rios", https://www.chfutaleufu.com.ar/serv/hoy.asp (checked hourly).
- Río Espolón: DGA Chile station 10701002-5 (provisional real-time data) via caudalrio.cl (unofficial third party).
- Río Futaleufú ante junta Río Malito: DGA Chile station 10704002-1.
- Río Azul: no gauge; estimated as 45% of the other inflows (Malito − dam − Espolón).