ONS Subsystem · Brazil
SUL
34.2% average fill
Reservoirs
19
Volume stored
15,924 hm³
Total capacity
46,592 hm³
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All reservoirs
19 reservatóriosSALTO SANTIAGO
Paraná
Fill level
66.9%
2752 hm³
/ 6,775 cap.
G. B. MUNHOZ
Paraná
Fill level
93.7%
3564 hm³
/ 5,779 cap.
ITÁ
Rio Grande do Sul
Fill level
69.2%
552 hm³
/ 5,100 cap.
BARRA GRANDE
Santa Catarina
Fill level
95.6%
2097 hm³
/ 4,904.45 cap.
PASSO REAL
Rio Grande do Sul
Fill level
65.8%
2208 hm³
/ 3,646 cap.
SALTO CAXIAS
Paraná
Fill level
66.3%
181 hm³
/ 3,573 cap.
MACHADINHO
Santa Catarina
Fill level
86.2%
910 hm³
/ 3,340 cap.
SEGREDO
Paraná
Fill level
93.0%
357 hm³
/ 2,950 cap.
GOV JAYME CANET JR
Paraná
Fill level
98.1%
655 hm³
/ 2,137 cap.
PASSO FUNDO
Rio Grande do Sul
Fill level
78.9%
1108 hm³
/ 1,589 cap.
FOZ CHAPECO
Rio Grande do Sul
Fill level
48.6%
38 hm³
/ 1,513 cap.
CAMPOS NOVOS
Santa Catarina
Fill level
90.6%
117 hm³
/ 1,477 cap.
SALTO OSORIO
Paraná
Fill level
95.0%
383 hm³
/ 1,124 cap.
SAO ROQUE
Santa Catarina
Fill level
105.0%
482 hm³
/ 795.67 cap.
ITAUBA
Rio Grande do Sul
Fill level
57.4%
91 hm³
/ 620 cap.
SANTA CLARA-PR
Paraná
Fill level
103.0%
270 hm³
/ 431 cap.
D. FRANCISCA
Rio Grande do Sul
Fill level
105.0%
66 hm³
/ 330 cap.
GARIBALDI
Santa Catarina
Fill level
105.0%
67 hm³
/ 296 cap.
BAIXO IGUACU
Paraná
Fill level
77.3%
26 hm³
/ 211.92 cap.
About reservoirs in SUL
As of August 1, 2026, the reservoirs we track across SUL that report live levels hold roughly 15,924 hm³ of water — about 34.2% of their combined capacity. Taken together, SUL's reservoirs are low.
None of the tracked reservoirs are currently at critically low levels. SAO ROQUE is the fullest at 105.0%, while FOZ CHAPECO is the lowest at 48.6%.
Over the most recent week on record, 2 reservoirs rose and 5 reservoirs fell across SUL.
Storage figures for SUL come from ONS; the most recent reading is from August 1, 2026. Each reservoir below links to its own page with full history and seasonal context.
SUL at a glance
- Reservoirs tracked
- 19
- Average fill
- 34.2%
- Water stored
- 15,924 hm³
- Combined capacity
- 46,592 hm³
- Fullest
- SAO ROQUE (105.0%)
- Lowest
- FOZ CHAPECO (48.6%)
- Last updated
- August 1, 2026
Frequently asked questions
How full are reservoirs in SUL right now?
As of August 1, 2026, the reservoirs tracked in SUL that report live levels are 34.2% full overall, holding about 15,924 hm³ of water.
How many reservoirs are there in SUL?
reservoirs.earth tracks 19 reservoirs in SUL, with a combined storage capacity of 46,592 hm³.
Which reservoir in SUL is the fullest?
SAO ROQUE is currently the fullest reservoir in SUL, at 105.0% of capacity.
Which reservoir in SUL is the lowest?
FOZ CHAPECO is currently the lowest in SUL, at 48.6% of capacity.
Where does the reservoir data for SUL come from?
All storage figures for SUL come from ONS, an official source, last updated August 1, 2026.