Lakes of Bendakaluru

Satellite view: Esri, Maxar, Earthstar Geographics

Kalena Agrahara Govt. Lake

Also called Kalena Agrahara lake

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

See it on the map
Size
3.61 acresAbout 2 football pitches
Rank by size
1109th 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
3% of the lakeSatellite, 2021. The 2018 survey found 3% encroached.

Through the years

Nothing on record for 1909 to 1979 and 1981 to 1983.

The records listed below, drawn on one line from 1908 to 2026.

  1. 1908

    Built

    As the 2018 lake survey records it

    See source

  2. 1980

    Not on the survey map

    See source

  3. 1984-2021

    Held water most years

    Water in 23% of all satellite passes, 1984-2024

    0% of its water area has since gone dry; 32% is new water

    See sourceSee source

  4. 2017-2018

    In the water bodies census, not marked as encroached

    This census's status marks are often wrong

    See source

  5. 2017-2025

    Mostly water in most years

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

    See source

  6. 2018

    Still there in the 2018 lake survey

    3% encroached, polluted, 7.75 acres surveyed

    See source

  7. 2023-2026

    Tested by the state board in 36 months, most often fit only for wildlife and fish

    Jul 2023 to Jul 2026

    See every testSee source

  8. 2024

    On the state's list of Bengaluru lakes, looked after by BBMP

    See source

  9. 2025-2026

    Mostly open water after the monsoon and in the dry season

    After monsoon, Oct 2025 to Dec 2025

    • 100% open water
    • 0% floating weed
    • 0% dry or built

    Dry season, Mar 2026 to May 2026

    • 99% open water
    • 0% floating weed
    • 1% dry or built
    See source

How big it is

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

Drawn outline
3.61 acres

About 2 football pitches

See source
Land records
7.75 acres

About 4.4 football pitches

See source
2018 lake survey
7.75 acres

About 4.4 football pitches

See source
End to end
232 m

The longest straight line across the outline

See source
Deepest point, 2018
3 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 36 times since Jul 2023
Fit only for wildlife and fish: 34 months. Fit only for irrigation: 2 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
Polluted
See source
What pollutes it, 2018

Sewage

See source
Sewage flows in, 2018

From the north-east and west

See source
Older tests
2 readings

From 2021

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

Latest test, Jul 2026. Too low to measure: boron, carbonate, fluoride, phenolphthalein alkalinity, kjeldahl nitrogen

MeasureUnitValue
Water temperature°C25
Dissolved oxygenmg/L4.5
pH7.5
ConductivityµS/cm786
BODmg/L6
Nitratemg/L as N3.02
Nitritemg/L as N0.06
Faecal coliformMPN/100mL470
Total coliformMPN/100mL2,200
Bicarbonatemg/L170
TurbidityNTU23.5
Total alkalinitymg/L as CaCO3170
Chloridemg/L11
CODmg/L72
Ammonia nitrogenmg/L as N0.4
Total hardnessmg/L as CaCO3260
Calcium hardnessmg/L as CaCO3170
Calciummg/L68
Magnesium hardnessmg/L as CaCO390
Magnesiummg/L21.9
Sulphatemg/L50
Sodiummg/L79
Dissolved solidsmg/L534
Suspended solidsmg/L32
Phosphatemg/L0.37
Potassiummg/L8
Sodium share%39
Sodium adsorption ratio2.12
Orthophosphatemg/L0.87

Every month the state board tested it

MonthClassDissolved oxygenmg/LBODmg/LFaecal coliformMPN/100mLTotal coliformMPN/100mLSource
Jul 2026D4.564702,200See source
Jun 2026D4.985802,100See source
May 2026D642702,400See source
Apr 2026D5.284305,400See source
Mar 2026D5.8626,00063,000See source
Feb 2026D5.955801,700See source
Jan 2026D65320920See source
Dec 2025D6.343304,300See source
Nov 2025D6.141502,400See source
Oct 2025D6.141,4007,000See source
Sep 2025D5.653303,500See source
Aug 2025D662202,800See source
Jul 2025E122,70013,000See source
Jun 2025D5.342602,800See source
May 2025D4.21014920See source
Apr 2025D4.684002,200See source
Mar 2025D5.3134802,800See source
Feb 2025D4.16261,600See source
Jan 2025D5.1121,7007,900See source
Dec 2024D6.543102,100See source
Nov 2024D4.283103,500See source
Oct 2024E120311,600See source
Sep 2024D4.481,7003,300See source
Aug 2024D6.142,1004,800See source
Jul 2024D4.22,3007,900See source
Jun 2024D5.471703,500See source
May 2024D5.652,10013,000See source
Apr 2024D4.681,4007,000See source
Mar 2024D4.353,3004,800See source
Feb 2024D5.464,60011,000See source
Jan 2024D6.142,20024,000See source
Dec 2023D4.2134905,400See source
Oct 2023D4.9758016,000See source
Sep 2023D4.584,90035,000See source
Aug 2023D5.852,30024,000See source
Jul 2023D552,20024,000See source

Older tests

DateWhereReadingWater temperature°CDissolved oxygenmg/LpHConductivityµS/cmBODmg/LNitrate and nitritemg/L as NFaecal coliformMPN/100mLTotal coliformMPN/100mLSource
2021Kalena Agrahara Lake, LakeLowest254.16.5424313,30024,000See source
2021Kalena Agrahara Lake, LakeHighest257.28.41,304125.323,0002,40,000See 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
2018-01-1024.1118.4608680108244.839233.42311,600
See source

How much is built over

Built inside the outline
3%

From satellite land cover, 2021

See source
Encroached area, 2017
2.29 acres

Reported by the state legislature’s committee on lake encroachment

See source
Encroached by

The public

See source
Taken for

Settlement

See source
Where it is encroached

On the north-east side

See source
Dumped in it

Garbage dump, construction debris

See source
Other problems noted

Road is constructed on bund & apartment coming adjacent to the lake

See source
Land record maps
See source
Land within 500 m

53% built, 38% trees, 4% crops, 3% grass, 1% bare ground, 0.7% shrubs

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
Work in progress
See source
City zone
Bommanahalli
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
Overflows into

Hulimavu Kere

See source
Catchment
0.5 km²

The land that drains into it

See source
Fed by, 2018 survey

Rain & drain fed

See source
Built parts, 2018 survey

3 inlet drains, no overflow weirs, 1 sluice gate, no culverts, no check dams and no islands

See source
Nearest sewage treatment plant

Hulimavu 10MLD Sewage Treatment Plant

1.5 km away, treats 10 million litres a day

See source

What lives here

Birds recorded
57 species

Most seen: Common Myna, Black Kite, Rock Pigeon, Rose-ringed Parakeet and Red-whiskered Bulbul.

455 sightings, mostly from birdwatchers

See source
All wildlife recorded
57 species

455 records, 2015 to 2024

See source
Photographed on iNaturalist
1 times

Last seen Apr 2026

See source
Animals seen, 2018 survey

Birds

See source
Water plants, 2018 survey

Emergent and rooted floating

See source

Around it

Around it in 2018

Settlement, agriculture & vacant land

See source

Photos

No photos of it on Wikimedia Commons yet.

Where it is

Ward 37
Yelenahalli

ಯೆಲೇನಹಳ್ಳಿ

Bengaluru South corporation, Bangalore South assembly seat

See source
Village
Kalena Agrahara

Begur hobli, Bengaluru South taluk, Bengaluru Urban district

See source
Land survey numbers

43

See source
Height above sea level
927 m
See source
Coordinates

12.8655° N, 77.5898° E

See source

Read more

OpenStreetMap
See source
Its number in each record
ATREE lake map
132
2018 lake survey
BUBSBGkla_kr1-1454
Lake Development Authority
LDA254
KGIS tank map
1011
Water bodies census
2/12/002/276600/1302864/010
City lake monitoring site
100