Open water-data platform · 27 countries
Reservoir water levels, worldwide
Live storage and fill levels for 2,306 reservoirs, drawn from official hydrological sources across 27 countries — checked daily.
27
Countries tracked
2,306
Reservoirs tracked
51.2%
Global average fill
211
At critically low levels
1,396 km³
Combined capacity
Updated Oct 9, 2026 · 2,189 reservoirs reporting
Reservoirs.EARTH tracks how full the world’s reservoirs are. We collect official storage readings from national hydrological agencies and turn them into clear, comparable fill levels, multi-year trends and seasonal context — so anyone can see, at a glance, whether a dam is filling up or drying out. Every figure links back to its source, and we check for new official readings every day.
Countries covered
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MITECO official data
Spain
Average fill
58.3%
401 reservoirs
SNIRH official data
Portugal
Average fill
85.0%
51 reservoirs
USGS NWIS data
United States
Average fill
56.3%
550 reservoirs
ONS official data
Brazil
Average fill
64.0%
102 reservoirs
CWC official data
India
Average fill
61.0%
318 reservoirs
DWS official data
South Africa
Average fill
98.0%
218 reservoirs
IRSA official data
Pakistan
Average fill
83.1%
3 reservoirs
BOM official data
Australia
Average fill
63.2%
281 reservoirs
XM data · energy (GWh)
Colombia
Average fill
74.8%
24 reservoirs
WRA official data
Taiwan
Average fill
62.5%
20 reservoirs
WSD official data
Hong Kong
Average fill
85.8%
17 reservoirs
WUC official data
Botswana
Average fill
82.1%
9 reservoirs
Maa Dialna official data
Morocco
Average fill
65.3%
22 reservoirs
DWS weekly table
Lesotho
Average fill
93.7%
2 reservoirs
DWS weekly table · Maguga
Eswatini
Average fill
99.9%
1 reservoir
ZINWA official data
Zimbabwe
Average fill
84.6%
152 reservoirs
ZRA · Lake Kariba, whole lake
Zambia
Average fill
38.0%
1 reservoir
DGREH official data
Burkina Faso
Average fill
90.7%
21 reservoirs
MOEW official data
Bulgaria
Average fill
65.2%
51 reservoirs
WDD official data
Cyprus
Average fill
37.1%
21 reservoirs
USGS/PREPA · water level (m)
Puerto Rico
Below seasonal norm
14 / 19
19 reservoirs
NVE data · energy (TWh)
Norway
Average fill
67.9%
5 price areas
SYKE data · energy (GWh)
Finland
Average fill
71.0%
1 national series
RTE hydraulic stock · named reservoirs
France
Average fill
51.2%
1 national series
ADMIE filling rate · EYDAP m³
Greece
Average fill
42.7%
16 filling rates
Povodí Labe, Odry, Morava
Czechia
Average fill
69.6%
50 reservoirs
Meridian/NZX · energy (GWh)
New Zealand
Average fill
75.5%
5 storage areas
Right now around the world
Sizeable reservoirs with a reading in the last 30 days.
Lowest levels
Closest to empty
Reservoir Transparency Index
How openly does your country publish its water data?
We scored 195 countries on the openness of their reservoir reporting. See the rankings, grades and methodology.
Built on official data
Every reading comes from a national hydrological authority — never estimated or crowd-sourced.
From The Reservoir
All articles →Oct 6, 2026 · 8
Karnataka Reservoir Levels, October 2026: 65% Full — Krishna Banked, KRS at 47%
Karnataka's 18 major reservoirs are 64.8% full at the start of October. Almatti is 80.7% and Hidkal 95%, but Krishnaraja Sagar (KRS) is 47% against 96% a year ago. The Cauvery group has fallen from 74% in August to 47%. Thirteen dams with a late-September reading in both years are 35 points behind 2025.
Oct 5, 2026 · 7
US Reservoir Levels, October 2026: 53.6% Full — Tied with 2022, 12 Points Below 2023
On a fixed basket of 309 reservoirs, early October 2026 storage was 53.6% of capacity — essentially tied with 2022 (53.4%) and down from 65.7% in 2023, 63.0% in 2024 and 58.8% in 2025. Colorado is 23 points below its 4-year October average; Blue Mesa is at 19%.
Sep 30, 2026 · 5
Five Yakima Basin Reservoirs, September 2026: 20% Full — 2.3 Times 2025, Half of 2022
The five Yakima storage reservoirs held 264 million cubic metres on 29 September 2026, 20.1% of capacity. That is 2.3 times the 115 million cubic metres of a year earlier, and half the 533 million cubic metres of 29 September 2022. Rimrock and Kachess hold the gain. Cle Elum, the largest, is at 6.4%.