Rio de Janeiro

As of September 9, 2026, the reservoirs we track across Rio de Janeiro that report live levels hold roughly 233 hm³ of water — about 26.2% of their combined capacity. Taken together, Rio de Janeiro's reservoirs are low.

Across the region, 1 is low.

Over the most recent week on record, 1 reservoir rose across Rio de Janeiro.

Storage figures for Rio de Janeiro come from ONS; the most recent reading is from September 9, 2026. Each reservoir below links to its own page with full history and seasonal context.