State · Brazil
Rondônia
17% average fill
Reservoirs
4
Volume stored
1,530 hm³
Total capacity
9,001 hm³
Critical
1
Low level
1
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Reservoirs
1 basinSAMUEL
Rondônia
Fill level
35.3%
900 hm³
/ 3,493.44 cap.
JIRAU
Rondônia
Fill level
0.9%
14 hm³
/ 2,746.73 cap.
SANTO ANTONIO
Rondônia
Fill level
96.8%
474 hm³
/ 2,282.8 cap.
RONDON II
Rondônia
Fill level
49.6%
142 hm³
/ 478.29 cap.
About reservoirs in Rondônia
As of September 9, 2026, the reservoirs we track across Rondônia that report live levels hold roughly 1,530 hm³ of water — about 17.0% of their combined capacity. Taken together, Rondônia's reservoirs are critically low.
Across the region, 1 reservoir is at critically low levels and 1 is low. SANTO ANTONIO is the fullest at 96.8%, while JIRAU is the lowest at 0.9%.
Over the most recent week on record, 1 reservoir rose and 2 reservoirs fell across Rondônia.
Storage figures for Rondônia 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.
Rondônia at a glance
- Reservoirs tracked
- 4
- Average fill
- 17.0%
- Water stored
- 1,530 hm³
- Combined capacity
- 9,001 hm³
- At critically low levels
- 1
- Fullest
- SANTO ANTONIO (96.8%)
- Lowest
- JIRAU (0.9%)
- Last updated
- September 9, 2026