Lakes of Bendakaluru

Satellite view: Esri, Maxar, Earthstar Geographics

Bhoganahalli Kere

ಭೋಗನಹಳ್ಳಿ ಕೆರೆ

Also called Bhoganahalli Lake

Kere, a large tank, in Panathur ward, Bengaluru East

See it on the map
Size
8.95 acresAbout 5.1 football pitches
Rank by size
802nd 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
6% of the lakeSatellite, 2021. The 2018 survey found 2% encroached.

Through the years

Nothing on record for 1903 to 1944, 1946 to 1979 and 1981 to 1983.

The records listed below, drawn on one line from 1902 to 2026.

  1. 1902

    Built

    As the 2018 lake survey records it

    See source

  2. 1945

    On the survey map

    See source

  3. 1980

    On the survey map

    See source

  4. 1984-2021

    Held water most years

    Water in 20% of all satellite passes, 1984-2024

    0% of its water area has since gone dry; 8% is new water

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

    See sourceSee source

  5. 2017-2018

    In the water bodies census, not marked as encroached

    This census's status marks are often wrong

    See source

  6. 2017-2025

    No one cover holds over half of it in most years

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

    See source

  7. 2018

    Still there in the 2018 lake survey

    2% encroached, polluted, 12.6 acres surveyed

    See source

  8. 2025-2026

    Tested by the state board in 16 months, most often fit only for wildlife and fish

    Apr 2025 to Jul 2026

    See every testSee source

  9. 2025-2026

    Mostly open water after the monsoon and in the dry season

    After monsoon, Oct 2025 to Dec 2025

    • 70% open water
    • 7% floating weed
    • 23% dry or built

    Dry season, Mar 2026 to May 2026

    • 84% open water
    • 0% floating weed
    • 17% dry or built
    See source

How big it is

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

Drawn outline
8.95 acres

About 5.1 football pitches

See source
Land records
12.6 acres

About 7.1 football pitches

See source
2018 lake survey
12.6 acres

About 7.1 football pitches

See source
End to end
367 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 16 times since Apr 2025
Fit only for wildlife and fish: 13 months. Fit only for irrigation: 3 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 south-west

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, phenolphthalein alkalinity, kjeldahl nitrogen, suspended solids

MeasureUnitValue
Water temperature°C25
Dissolved oxygenmg/L5.6
pH7.3
ConductivityµS/cm891
BODmg/L6
Nitratemg/L as N3.6
Nitritemg/L as N0.14
Faecal coliformMPN/100mL790
Total coliformMPN/100mL5,400
Bicarbonatemg/L212
TurbidityNTU8.3
Total alkalinitymg/L as CaCO3212
Chloridemg/L144
CODmg/L60
Ammonia nitrogenmg/L as N0.4
Total hardnessmg/L as CaCO3212
Calcium hardnessmg/L as CaCO3112
Calciummg/L44.8
Magnesium hardnessmg/L as CaCO3100
Magnesiummg/L24.3
Sulphatemg/L35
Sodiummg/L78
Dissolved solidsmg/L608
Phosphatemg/L0.5
Potassiummg/L4
Fluoridemg/L0.39
Sodium share%44
Sodium adsorption ratio2.33
Orthophosphatemg/L1.44

Every month the state board tested it

MonthClassDissolved oxygenmg/LBODmg/LFaecal coliformMPN/100mLTotal coliformMPN/100mLSource
Jul 2026D5.667905,400See source
Jun 2026E2197901,700See source
May 2026E3.3117901,400See source
Apr 2026E3324705,400See source
Mar 2026D4.674602,800See source
Feb 2026D5.966303,500See source
Jan 2026D583905,400See source
Dec 2025D4.992604,300See source
Nov 2025D4.562602,200See source
Oct 2025D6.244603,500See source
Sep 2025D5.652101,700See source
Aug 2025D6.143902,200See source
Jul 2025D5.871,7006,300See source
Jun 2025D5.952201,500See source
May 2025D6.142202,200See source
Apr 2025D6.541402,400See 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
2017-11-3024.7137.65334621811.52.48019.20.1717
See source

How much is built over

Built inside the outline
6%

From satellite land cover, 2021

See source
Encroached area, 2017
0.57 acres

Reported by the state legislature’s committee on lake encroachment

See source
Encroached by

Private owners

See source
Taken for

Eucalyptus plantation & houses

See source
Where it is encroached

On the south-east and north-east side

See source
Dumped in it

Garbage & construction debris

See source
Other problems noted

Apartment in buffer zone

See source
Land record maps
See source
Land within 500 m

41% built, 30% crops, 18% shrubs, 6% trees, 4% grass, 0.6% 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
Work in progress
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
Overflows into

Varthur Lake

See source
Catchment
0.4 km²

The land that drains into it

See source
Fed by, 2018 survey

Rain & drain

See source
Built parts, 2018 survey

1 inlet drain, no overflow weirs, no sluice gates, 1 culvert, no check dams and no islands

See source
Used for, 2018 survey

Washing

See source
Nearest sewage treatment plant

Sewage Treatment Plant

2.3 km away

See source

What lives here

Birds recorded
63 species

Most seen: Black Kite, Little Cormorant, Ashy Prinia, Little Grebe and Rock Pigeon.

314 sightings, mostly from birdwatchers

See source
All wildlife recorded
66 species

317 records, 2020 to 2025

See source
Photographed on iNaturalist
13 times

5 species, 3 confirmed by other naturalists.

Most seen: Aquarius adelaidis, Indian Black Ant, Common Bluetail, Robust Crazy ant and Keyhole Glider.

Last seen Oct 2025

See source
Animals seen, 2018 survey

Butterflies

See source
Water plants, 2018 survey

Emergent

See source
Weed cover, 2018 survey

Complete

See source

Around it

Around it in 2018

Plantation, shed, slope & bare land

See source

Photos

No photos of it on Wikimedia Commons yet.

Where it is

Ward 48
Panathur

ಪಣತ್ತೂರು

Bengaluru East corporation, Mahadevapura assembly seat

See source
Village
Bhoganahalli

Varthuru hobli, Bengaluru East taluk, Bengaluru Urban district

See source
Land survey numbers

21

See source
Height above sea level
884 m
See source
Coordinates

12.9233° N, 77.6990° E

See source

Read more

OpenStreetMap
See source
Its number in each record
ATREE lake map
105
2018 lake survey
BUBEVRbhg_kr2-515
Lake Development Authority
LDA051
KGIS tank map
642
Water bodies census
2/12/002/276600/1302822/008
City lake monitoring site
196