Lakes of Bendakaluru

Satellite view: Esri, Maxar, Earthstar Geographics

Kasavanahalli Kere

ಕಸವನಹಳ್ಳಿ ಲೇಕ್ಕೆ

Also called Kasavanahalli Lake

Kere, a large tank, in Kasavanahalli ward, Bengaluru South

See it on the map
Size
31.6 acresAbout 18 football pitches
Rank by size
294th largestOf 1,621 lakes that still exist
Valley
Koramangala-Challaghatta
Who looks after it
BBMPBruhat Bengaluru Mahanagara Palike
Water quality
Fit only for wildlife and fishTested Jul 2026
Built over
0% of the lakeSatellite, 2021. The 2018 survey found 0.0% encroached.

Through the years

Nothing on record for 1905 to 1944, 1946 to 1954, 1956 to 1979 and 1981 to 1983.

The records listed below, drawn on one line from 1904 to 2026.

  1. 1904

    Built

    As the 2018 lake survey records it

    See source

  2. 1945

    On the survey map

    See source

  3. 1955

    Not on the U.S. Army map

    Compiled from Survey of India maps of 1945-46

    See source

  4. 1980

    On the survey map

    See source

  5. 1984-2021

    Held water most years

    Water in 48% of all satellite passes, 1984-2024

    0% of its water area has since gone dry; 79% is new water

    4 years not counted: the satellite saw under half the lake

    See sourceSee source

  6. 2017-2018

    In the water bodies census, not marked as encroached

    This census's status marks are often wrong

    See source

  7. 2017-2025

    Mostly water every year

    About three in four of these readings are right, so trust what holds for several years

    See source

  8. 2018

    Still there in the 2018 lake survey

    0.0% encroached, sewage and clean, 55.2 acres surveyed

    Restored, year not recorded

    See source

  9. 2023-2026

    Tested by the state board in 29 months, most often fit only for wildlife and fish

    Jul 2023 to Jul 2026

    See every testSee source

  10. 2025-2026

    Mostly open water after the monsoon and in the dry season

    After monsoon, Oct 2025 to Dec 2025

    • 98% open water
    • 2% floating weed
    • 0.2% dry or built

    Dry season, Mar 2026 to May 2026

    • 98% open water
    • 1% floating weed
    • 0.7% dry or built
    See source

How big it is

The records disagree on its size, so each measure is shown.

Drawn outline
31.6 acres

About 18 football pitches

See source
Land records
33.9 acres

About 19 football pitches

See source
2018 lake survey
55.2 acres

About 31 football pitches

See source
End to end
605 m

The longest straight line across the outline

See source
Deepest point, 2018
3.5 m
See source
Kind of lake
Kere, a large tank
See source

How clean the water is

Latest test
Fit only for wildlife and fish

Fit only for wildlife and fisheries. Class D on the state board’s scale from A, the cleanest, to E.

Tested Jul 2026

See source
Class each month, tested 29 times since Jul 2023
Fit only for wildlife and fish: 28 months. Fit only for irrigation: 1 months. Every month is listed in the readings below.
Drinkable after disinfection
Fit for bathing
Drinkable after treatment
Fit only for wildlife and fish
Fit only for irrigation
See source
How it looked in 2018
Sewage and clean
See source
What pollutes it, 2018

Sewage

See source
Sewage flows in, 2018

From the south

See source
Older tests
4 readings

From 2011, 2015 and 2021

See sourceSee sourceSee source
Inlet and outlet tests, 2017-18
2 readings
See source
Every reading
Show every reading

Latest test, Jul 2026. Too low to measure: boron, carbonate, nitrite, phenolphthalein alkalinity, phosphate, kjeldahl nitrogen, suspended solids

MeasureUnitValue
Water temperature°C24
Dissolved oxygenmg/L5.6
pH7.2
ConductivityµS/cm788
BODmg/L6
Nitratemg/L as N2.9
Faecal coliformMPN/100mL400
Total coliformMPN/100mL2,800
Bicarbonatemg/L132
TurbidityNTU2.8
Total alkalinitymg/L as CaCO3132
Chloridemg/L188
CODmg/L64
Ammonia nitrogenmg/L as N0.46
Total hardnessmg/L as CaCO3120
Calcium hardnessmg/L as CaCO360
Calciummg/L24
Magnesium hardnessmg/L as CaCO360
Magnesiummg/L14.6
Sulphatemg/L39
Sodiummg/L80
Dissolved solidsmg/L544
Potassiummg/L8
Fluoridemg/L0.4
Sodium share%57
Sodium adsorption ratio3.1
Orthophosphatemg/L0.3

Every month the state board tested it

MonthClassDissolved oxygenmg/LBODmg/LFaecal coliformMPN/100mLTotal coliformMPN/100mLSource
Jul 2026D5.664002,800See source
Jun 2026D5.653,2009,400See source
May 2026D4.855802,100See source
Apr 2026D4.664809,200See source
Mar 2026D573302,400See source
Feb 2026D742401,700See source
Jan 2026D6.152402,200See source
Dec 2025D5.743202,800See source
Nov 2025D6.143302,100See source
Oct 2025D4.473103,500See source
Sep 2025D5.862602,200See source
Aug 2025D6.6420540See source
Jul 2025D593801,500See source
Jun 2025D651102,400See source
May 2025D6.272601,500See source
Apr 2025D662303,500See source
Feb 2025D5.462302,800See source
Jan 2025D7.379307,900See source
Nov 2024D4.771704,300See source
Sep 2024D541,5004,800See source
Aug 2024D6.44211,600See source
Jul 2024E1.7105809,200See source
Jun 2024D6.15211,600See source
Mar 2024D652202,400See source
Jan 2024D4.9832,0003,50,000See source
Oct 2023D5.854,90024,000See source
Sep 2023D5.344,60054,000See source
Aug 2023D4.684,80092,000See source
Jul 2023D6.5423,0002,40,000See source

Older tests

DateWhereReadingChloridePhosphateSuspended solidsmg/LDissolved oxygenmg/LCODmg/LNitratemg/L as NTotal hardnessFluoridepHZincManganeseConductivityµS/cmDissolved solidsmg/LWater temperature°CBODmg/LNitrate and nitritemg/L as NFaecal coliformMPN/100mLTotal coliformMPN/100mLSource
2011Kasavanahalli Kere, Inlet2300.01175.58.257.63.481960.518.510.080.17See source
2015-06-09Kasavanahalli Lake258.91,37069230.8See source
2021Kasavanahalli Lake, LakeLowest4.66.721025414,60035,000See source
2021Kasavanahalli Lake, LakeHighest7.17853256546,0003,50,000See source

Inlet and outlet tests, 2017-18 lake survey

DateWhereWater temperature°CLight transparencycmpHConductivityµS/cmDissolved solidsmg/LSuspended solidsmg/LTurbidityNTUDissolved oxygenmg/LCODmg/LBODmg/LTotal phosphateKjeldahl nitrogenmg/L as NTotal coliformMPN/100mL
2017-12-04Inlet23.5187.58575266152.2162.90.10350
2017-12-04Outlet23.5237.45885343.68.64.63214.80.20280
See source

How much is built over

Built inside the outline
0%

From satellite land cover, 2021

See source
Encroached area, 2017
2.55 acres

Reported by the state legislature’s committee on lake encroachment

See source
Encroached by

The public

See source
Taken for

Plantation

See source
Where it is encroached

On the north-east and west side

See source
Dumped in it

Plastic waste

See source
Land record maps
See source
Land within 500 m

52% built, 25% trees, 10% crops, 9% shrubs, 3% grass, 2% bare ground

From satellite land cover, 2021

See source

Who looks after it

Looked after by
Bruhat Bengaluru Mahanagara Palike

BBMP

See source
City work on the lake
Developed
See source
City zone
Mahadevapura
See source
City lake page

Open its page on the city’s lake monitoring site

See source

Where its water comes from and goes

Valley
Koramangala-Challaghatta

The river basin its water drains to

See source
Water comes from
See source
Overflows into

Kaikondanahalli Kere

See source
Catchment
8.9 km²

The land that drains into it

See source
Fed by, 2018 survey

Rain & drain

See source
Built parts, 2018 survey

3 inlet drains, 1 overflow weir, 1 sluice gate, 4 culverts, no check dams and 1 island

See source
Used for, 2018 survey

Construction and fishing

See source
Nearest sewage treatment plant

Sewage Treatment Plant

1.9 km away

See source

What lives here

Birds recorded
145 species

Most seen: Spot-billed duck, Western Swamphen, Eurasian Coot, Gray Heron and Purple Heron.

15,389 sightings, mostly from birdwatchers

See source
All wildlife recorded
229 species

15,531 records, 2016 to 2026

See source
Threatened species seen here
4
  • Spot-billed Pelican near threatened
  • River Tern vulnerable
  • Greater spotted eagle vulnerable
  • Indian Roller near threatened
See source
Photographed on iNaturalist
654 times

191 species, 387 confirmed by other naturalists.

Most seen: Asian Openbill, Indian Spot-billed Duck, Eurasian Coot, Gray-headed Swamphen and Medium Egret.

Last seen Sep 2026

See source
Animals seen, 2018 survey

Birds and fish

See source
Water plants, 2018 survey

Free floating

See source
Weed cover, 2018 survey

Partial

See source

Around it

Around it in 2018

Vacant land, buildings, slope & bare land

See source

Photos

No photos of it on Wikimedia Commons yet.

Where it is

Ward 31
Kasavanahalli

ಕಸವನಹಳ್ಳಿ

Bengaluru South corporation, Mahadevapura assembly seat

See source
Village
Kasavanahalli

Varthuru hobli, Bengaluru East taluk, Bengaluru Urban district

See source
Land survey numbers

50 (Kasavanahalli), 32 (Haralur)

See source
Height above sea level
888 m
See source
Coordinates

12.9048° N, 77.6679° E

See source

Read more

OpenStreetMap
See source
Its number in each record
ATREE lake map
134
2018 lake survey
BUBEVRksv_kr4-569
Lake Development Authority
LDA278
KGIS tank map
964
Water bodies census
2/12/002/276600/1302822/006
City lake monitoring site
195