CACHOEIRA CALDEIRAO
Amapá · ARAGUARI
Capacity
231.21 hm³
Coordinates
0.853°N, 51.297°W
Operator
ONS
104.4% full
Current fill
104.4%vs 7 days ago
+6.6 ppgaining
vs 1 year ago
+12.1 ppyear-over-year
7-day trend
↑rising
Drought context
Storage vs October average
105%of normal
104.4% full on 2026-10-26, against an average of 99.6% for October across 2 years of readings (+4.8 points).
Rain over the last three months · 11 October 2026
Moderately dry
In the three months to 11 October 2026 the area around CACHOEIRA CALDEIRAO had well below normal rain, a shortfall seen about one year in six. Rainfall compared with the long-run record for the same season at this point (Copernicus Global Drought Observatory, SPI-3 index −1.36). Rain, not storage. Brazil drought figures →
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Technical specifications
| Total 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°N, 51.297°W · Open in Google Maps
About CACHOEIRA CALDEIRAO
As of October 26, 2026, CACHOEIRA CALDEIRAO is filled to 104.4% of its total capacity, holding 241.5 hm³ of water out of a maximum 231.21 hm³. At this level the reservoir is effectively full.
Over the most recent week on record the fill level has risen by 6.6 percentage points, and it is 12.1 points above its level on the same date a year earlier.
Across the readings we hold for CACHOEIRA CALDEIRAO — 55 data points between October 3, 2025 and October 26, 2026 — the level has ranged from a low of 0.9% (April 24, 2026) to a high of 104.4% (December 12, 2025). On average the reservoir is fullest around August 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
- 104.4% of total capacity
- Water stored
- 241.5 hm³
- Total capacity
- 231.21 hm³
- 7-day change
- ▲ 6.6 pp
- Year-on-year
- ▲ 12.1 pp
- Primary use
- Hydroelectric power
- River
- ARAGUARI-AP
- River basin
- ARAGUARI
- Operator
- ONS
- Coordinates
- 0.853°N, 51.297°W
- Last updated
- October 26, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 26 Oct 2026 | 104.4% | 241.5 |
| 19 Oct 2026 | 97.8% | 226.1 |
| 18 Oct 2026 | 103.3% | 238.9 |
| 13 Oct 2026 | 102.2% | 236.3 |
| 12 Oct 2026 | 102.2% | 236.3 |
| 8 Oct 2026 | 104.4% | 241.5 |
| 2 Oct 2026 | 102.2% | 236.3 |
| 25 Sep 2026 | 102.2% | 236.3 |
| 18 Sep 2026 | 97.8% | 226.1 |
| 11 Sep 2026 | 101.1% | 233.8 |
| 2 Sep 2026 | 104.4% | 241.5 |
| 26 Aug 2026 | 104.4% | 241.5 |