CACHOEIRA CALDEIRAO
Amapá · ARAGUARI
Capacity
231.21 hm³
Coordinates
0.853°N, 51.297°W
Operator
ONS
96.7% full
Current fill
96.7%vs 7 days ago
-8.3%losing
vs 1 year ago
N/A7-day trend
↓falling
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total capacity | 231.21 hm³ |
| Usable capacity | 231.21 hm³ |
| Primary use | Hydroelectric |
| Operator | ONS |
| River | ARAGUARI-AP |
| Province | Amapá |
| River basin | ARAGUARI |
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 0.853, -51.297 · Open in Google Maps
About CACHOEIRA CALDEIRAO
As of September 9, 2026, CACHOEIRA CALDEIRAO is filled to 96.7% of its total capacity, holding roughly 224 hm³ of water out of a maximum 231 hm³. At this level the reservoir is high.
Over the most recent week on record the fill level has fallen by 8.3 percentage points.
Across the readings we hold for CACHOEIRA CALDEIRAO — 52 data points between September 26, 2025 and September 9, 2026 — the level has ranged from a low of 0.0% (May 15, 2026) to a high of 105.0% (November 14, 2025). On average the reservoir is fullest around February and at its lowest around May.
It is operated by ONS primarily for hydroelectric power. It lies within the ARAGUARI basin at 0.853°N, 51.297°W.
Key facts
- Current fill level
- 96.7%
- Water stored
- 224 hm³
- Total capacity
- 231 hm³
- 7-day change
- ▼ 8.3 pts
- Primary use
- Hydroelectric power
- River
- ARAGUARI-AP
- River basin
- ARAGUARI
- Operator
- ONS
- Coordinates
- 0.853°N, 51.297°W
- Last updated
- September 9, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 9 Sep 2026 | 96.7% | 224 |
| 4 Sep 2026 | 105.0% | 243 |
| 28 Aug 2026 | 105.0% | 243 |
| 21 Aug 2026 | 105.0% | 243 |
| 14 Aug 2026 | 102.2% | 236 |
| 7 Aug 2026 | 105.0% | 243 |
| 31 Jul 2026 | 102.2% | 236 |
| 24 Jul 2026 | 105.0% | 243 |
| 17 Jul 2026 | 105.0% | 243 |
| 10 Jul 2026 | 94.5% | 219 |
| 3 Jul 2026 | 98.9% | 229 |
| 26 Jun 2026 | 105.0% | 243 |