Dartmouth

As of September 8, 2026, Dartmouth is filled to 75.9% of its total capacity, holding roughly 2,925 hm³ of water out of a maximum 3,856 hm³. At this level the reservoir is within its normal operating range. Of that total, about 3,785 hm³ is usable (live) storage.

Over the most recent week on record the fill level has held broadly steady (+1.3 pts), and it is 6.4 points above its level on the same date a year earlier.

Across the readings we hold for Dartmouth — 990 data points between October 4, 2023 and September 8, 2026 — the level has ranged from a low of 64.6% (March 17, 2026) to a high of 99.3% (October 25, 2023). On average the reservoir is fullest around December and at its lowest around June.

The dam at Dartmouth was completed in 1979. It is operated by BOM primarily for water supply. It lies within the Mitta Mitta River Basin basin at 36.686°S, 147.643°E.