Data

Tools

Indexes

Applications

Experiments

Open Sustainable Technology

Model My Watershed

A watershed-modeling web app for citizens, conservation practitioners, municipal decision-makers, educators, and students.

civic-apps-team hydrology stormwater watersheds

Natural Resources - Water Supply and Quality - Last synced: 15 Jun 2025 - Ranking: 9.6

StreamCat

Provides summaries of natural and anthropogenic landscape features for ~2.65 million streams, and their associated catchments, within the conterminous USA.

dataset hydrology nhdplus ord watersheds

Hydrosphere - Ocean and Hydrology Data Access - Last synced: 15 Jun 2025 - Ranking: 6.9

fwapg

Extends British Columbia's Freshwater Atlas with PostgreSQL/PostGIS.

british-columbia freshwater-atlas fwa lakes linear-referencing postgis rivers streams watersheds

Hydrosphere - Freshwater and Hydrology - Last synced: 15 Jun 2025 - Ranking: 4.3