State · Brazil
Rondônia
51.6% average fill
Reservoirs
4
Volume stored
4,648 hm³
Total capacity
9,001 hm³
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Reservoirs
1 basinSAMUEL
Rondônia
Fill level
93.8%
2392 hm³
/ 3,493.44 cap.
JIRAU
Rondônia
Fill level
100.0%
1511 hm³
/ 2,746.73 cap.
SANTO ANTONIO
Rondônia
Fill level
98.4%
482 hm³
/ 2,282.8 cap.
RONDON II
Rondônia
Fill level
92.1%
264 hm³
/ 478.29 cap.
About reservoirs in Rondônia
As of June 10, 2026, the reservoirs we track across Rondônia that report live levels hold roughly 4,648 hm³ of water — about 51.6% of their combined capacity. Taken together, Rondônia's reservoirs are within their normal operating range.
None of the tracked reservoirs are currently at critically low levels. JIRAU is the fullest at 100.0%, while RONDON II is the lowest at 92.1%.
Storage figures for Rondônia come from ONS; the most recent reading is from June 10, 2026. Each reservoir below links to its own page with full history and seasonal context.
Rondônia at a glance
- Reservoirs tracked
- 4
- Average fill
- 51.6%
- Water stored
- 4,648 hm³
- Combined capacity
- 9,001 hm³
- Fullest
- JIRAU (100.0%)
- Lowest
- RONDON II (92.1%)
- Last updated
- June 10, 2026
Frequently asked questions
How full are reservoirs in Rondônia right now?
As of June 10, 2026, the reservoirs tracked in Rondônia that report live levels are 51.6% full overall, holding about 4,648 hm³ of water.
How many reservoirs are there in Rondônia?
reservoirs.earth tracks 4 reservoirs in Rondônia, with a combined storage capacity of 9,001 hm³.
Which reservoir in Rondônia is the fullest?
JIRAU is currently the fullest reservoir in Rondônia, at 100.0% of capacity.
Which reservoir in Rondônia is the lowest?
RONDON II is currently the lowest in Rondônia, at 92.1% of capacity.
Where does the reservoir data for Rondônia come from?
All storage figures for Rondônia come from ONS, an official source, last updated June 10, 2026.