Following the discovery of a security vulnerability in the Python library py‑hydroweb, version 1.3.3 has just been released.
The hydroweb.next team recommends updating it as soon as possible. Thanks to Jonathan Peri for alerting us.

The Theia Sentinel-2 Surface Water - Level-2B dataset provides rasterized water detection data from Sentinel-2 MultiSpectral Instrument, along with appropriate flags.
This dataset is also available at Level-3 with monthly and annual syntheses in the Theia Sentinel-2 Surface Water Monthly Synthesis- Level-3B and Theia Sentinel-2 Surface Water Yearly Synthesis- Level-3B datasets respectively.
The dataset was generated using the SurfWater Processing Chain.
The Theia Sentinel-2 Surface Water - Level-2B dataset is organized into the original Sentinel-2 UTM Tiling Grid provided by Copernicus. Each of these tiles nominally contains data over 100 km x 100 km.
The dataset can be cited using the following DOI: https://doi.org/10.24400/329360/SW_L2_S2_SINGLE
Please also use the following reference publication:
Peña-Luque, S.; Ferrant, S.; Cordeiro, M.C.R.; Ledauphin, T.; Maxant, J.; Martinez, J.-M. Sentinel-1&2 Multitemporal Water Surface Detection Accuracies, Evaluated at Regional and Reservoirs Level. Remote Sens. 2021, 13, 3279. https://doi.org/10.3390/rs13163279
5 days or less
10 meters
Raster
GeoTIFF
Satellite
SW_L2_S2_SINGLE
1.4
ETALAB 2.0