Reservoirs ranked · 2026

Percent full and volume in storage

Each dot is a reservoir. Horizontal is useful capacity on a log scale; vertical position and dot size both show percent full. Color follows the fill-status scale. Hover for exact volume.

One colour per year. Each line is that year's fill % (left axis) on the same dates; bars are its daily rainfall (right axis). This year is a solid line; prior years are dashed. The shaded strip on the right is the week after today: this year has no readings there yet, so the dashed prior-year lines show what those dates looked like in 2025 and 2024. Red verticals mark BMC supply cuts (15 May: 10%; 17 Jun: 20% for industrial and commercial use). Hover any day for its change from the previous reading. Tap a year below to hide or show it.

Each dot is one BMC report. Gaps are days without a report. Select a reservoir in the legend to toggle its line. The y-axis switches between percent of capacity and volume in ML. Compare years splits the window into the same dates across 2026, 2025, and 2024.

Storage follows the monsoon cycle, so each bar uses the reading within ten days of 5 Oct in its year. Years without one are omitted.