MANSO

As of September 9, 2026, MANSO is filled to 78.1% of its total capacity, holding roughly 2,304 hm³ of water out of a maximum 7,337 hm³. At this level the reservoir is within its normal operating range. Of that total, about 2,951 hm³ is usable (live) storage.

Over the most recent week on record the fill level has held broadly steady (-0.5 pts).

Across the readings we hold for MANSO — 52 data points between September 26, 2025 and September 9, 2026 — the level has ranged from a low of 53.4% (November 28, 2025) to a high of 96.2% (March 13, 2026). On average the reservoir is fullest around March and at its lowest around November.

It is operated by ONS primarily for hydroelectric power. It lies within the PARAGUAI basin at 14.871°S, 55.784°W.