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Long-term average, % of active storage (Irrigation Department)

Medium reservoirs. Per cent, daily.

49.2% · 30 Sep 2026 (+4.0 pts on 29 Sep 2026)

1 Apr 2023 – 30 Sep 2026

Values

Latest · 30 Sep 202649.2%+4.0 pts on 29 Sep 2026
PeriodPer centChange, pts
30 Sep 202649.2%+4.0
29 Sep 202645.2%+0.3
28 Sep 202644.9%−0.3
27 Sep 202645.2%+0.1
26 Sep 202645.1%+0.1
25 Sep 202645.0%0.0
24 Sep 202645.0%−0.2
23 Sep 202645.2%−0.3
22 Sep 202645.5%−0.3
21 Sep 202645.8%−0.1
20 Sep 202645.9%−0.5
19 Sep 202646.4%0.0

Data source: Irrigation Department, Irrigation Department: daily water level and storage of major and medium reservoirs

Macro Lab · LK.WEATHER.RESERVOIR.TOTAL_MEDIUM.PCT_FULL_LTA.D · Data: Irrigation Department. Chart and text: CC BY 4.0

Cite as: Irrigation Department, via Macro Lab, macrolab.lk/data/series/LK.WEATHER.RESERVOIR.TOTAL_MEDIUM.PCT_FULL_LTA.D/. Spotted an error? Tell us.

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About this series

  • Source Irrigation Department, compiled by Macro Lab
  • Unit Per cent
  • Date range 1 Apr 2023 – 30 Sep 2026
  • Last checked 16 Oct 2026

Checks: no discrepancies recorded.

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Details

Name in the source
Medium reservoirs: long-term average, % of active storage (Irrigation Department)
Read from
Irrigation Department: daily water level and storage of major and medium reservoirs (Irrigation Department)
Source page
https://irrigation.gov.lk/web/index.php?option=com_content&view=article&id=84&Itemid=201&lang=en
Licence
Source: Irrigation Department, Water Management Branch.
Notes
Sum over the Irrigation Department's medium reservoirs (43, 88,618 ac-ft of active storage), on the days the reservoirs read hold at least 90% of it; the % is of the active storage of those read. The Department's long-term average for each calendar day, summed; dated on the days the total is. Source: Irrigation Department, Water Management Branch, daily water level and storage of major and medium reservoirs, https://irrigation.gov.lk/web/index.php?option=com_content&view=article&id=84&Itemid=201&lang=en.

Source documents

No file is recorded for these values.

Releases and revisions

One release so far, published 16 Oct 2026. Revisions show here once a later release changes a value.

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