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

Basins

Reservoirs

Nuwara Wewa

Malwathu OyaAnuradhapura

Nuwara Wewa reservoir is not releasing water and is 56% full. Irrigation Department, 26 Oct.

Holding

As of 26 Oct · Checked 10 min ago

56%full

16.8 of 23.0 ft

6.2 ft below full

Level +0.25 m since 23 Oct.

Mahaweli Authority: 57% (26 Oct)

Irrigation Department · 26 Oct

Release now

Not releasing water

Outlet gates 0 cusecs

Irrigation Department · 26 Oct

Rain, day before: 0 mm; Irrigation Department · 26 Oct
Holds when full: ~45 million m³; Irrigation Department · 26 Oct
Source: Irrigation Department · 26 Oct Mahaweli Authority · 26 Oct

Recent days

Water depth, % of full supply
Released downstream · 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

Thanthirimale

Other reservoirs

Photos

Nuwara Wewa
Photo: Umedha Hettigoda, CC BY-SA 2.0 via Wikimedia Commons
Nuwara Wewa, view 2
Photo: Esh7788, CC BY-SA 4.0 via Wikimedia Commons
Nuwara Wewa, view 3
Photo: Sachini poornima, CC BY-SA 4.0 via Wikimedia Commons
Nuwara Wewa, view 4
Photo: Umedha Hettigoda, CC BY-SA 2.0 via Wikimedia Commons

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

Common questions

Is Nuwara Wewa releasing water?: Nuwara Wewa reservoir is not releasing water and is 56% 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.