Where does the reservoir information come from?

From the Irrigation Department's daily reservoir sheet and the Mahaweli Authority's daily report. Both update about once a day, so check the date shown. This site is independent: for spill-gate warnings follow the Disaster Management Centre and call 117.

Sri Lanka Water LevelsLive river-gauge readings

Angamuwa Reservoir

Kala OyaAnuradhapura

Angamuwa reservoir is spilling about 2,540 cusecs and is 100% full. Irrigation Department, 26 Oct.

SpillingLarge release

As of 26 Oct · Checked 1 min ago

100%full

20.5 of 20.4 ft

0.1 ft above full

Level +0.03 m since 23 Oct.

Mahaweli Authority: 89% (26 Oct)

Irrigation Department · 26 Oct

Release now

2,540 cusecs

Spill

≈ 72,000 L/s · An Olympic pool every ~35 s

2 gates open

Spill 2,540Outlet gates 14

1 cusec ≈ 28 L/s

Irrigation Department · 26 Oct

Rain, day before: 0 mm; Irrigation Department · 26 Oct
Holds when full: ~16 million m³; Irrigation Department · 26 Oct
Source: Irrigation Department · 26 Oct Mahaweli Authority · 26 Oct

Recent days

Water depth, % of full supply
Spill · Release (cusecs)
Outlet gates

History starts 23 Oct 2026.

Where the water goes

GaugeReservoirTap a gauge or reservoir for details.

No river gauge of ours is directly below this reservoir.

Map of this river

On the same river

Gauges

Thambuththegama

Other reservoirs

Figures from the daily Irrigation Department and Mahaweli Authority reports. A blank there shows here as “no data”, never zero.

Common questions

Is Angamuwa releasing water?: Angamuwa reservoir is spilling about 2,540 cusecs and is 100% full. Irrigation Department, 26 Oct.
Where does the reservoir information come from?: From the Irrigation Department's daily reservoir sheet and the Mahaweli Authority's daily report. Both update about once a day, so check the date shown. This site is independent: for spill-gate warnings follow the Disaster Management Centre and call 117.

GaugeReservoirTap a gauge or reservoir for details.