Lakes of Bendakaluru

Satellite view: Esri, Maxar, Earthstar Geographics

Bhattarahalli Kere

Also called Bhattarahalli Lake

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

See it on the map
Size
7.84 acresAbout 4.4 football pitches
Rank by size
863rd largestOf 1,621 lakes that still exist
Valley
Hebbal
Who looks after it
BBMPBruhat Bengaluru Mahanagara Palike
Water quality
Fit only for irrigationTested Jul 2026
Built over
0.8% of the lakeSatellite, 2021. The 2018 survey found 4% encroached.

Through the years

Nothing on record for 1928 to 1954, 1957 to 1977 and 1979 to 1983.

The records listed below, drawn on one line from 1927 to 2026.

  1. 1927

    On the survey map

    See source

  2. 1955

    On the U.S. Army map

    Compiled from Survey of India maps of 1945-46

    See source

  3. 1956

    Built

    As the 2018 lake survey records it

    See source

  4. 1978

    On the survey map

    See source

  5. 1984-2021

    Held water most years

    Water in 22% of all satellite passes, 1984-2024

    0% of its water area has since gone dry; 68% 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 in most years

    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

    4% encroached, polluted, 18.3 acres surveyed

    See source

  9. 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

  10. 2024

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

    See source

  11. 2025-2026

    Mostly open water after the monsoon and in the dry season

    After monsoon, Oct 2025 to Dec 2025

    • 95% open water
    • 0% floating weed
    • 5% dry or built

    Dry season, Mar 2026 to May 2026

    • 97% open water
    • 0% floating weed
    • 3% dry or built
    See source

How big it is

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

Drawn outline
7.84 acres

About 4.4 football pitches

See source
Land records
18.3 acres

About 10 football pitches

See source
2018 lake survey
18.3 acres

About 10 football pitches

See source
End to end
293 m

The longest straight line across the outline

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

How clean the water is

Latest test
Fit only for irrigation

Fit only for irrigation, cooling and waste disposal. Class E 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: 29 months. Fit only for irrigation: 7 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

Road runoff

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, phenolphthalein alkalinity, sulphate, suspended solids

MeasureUnitValue
Water temperature°C26
Dissolved oxygenmg/L2
pH6.5
ConductivityµS/cm1,138
BODmg/L28
Nitratemg/L as N4
Nitritemg/L as N0.29
Faecal coliformMPN/100mL1,500
Total coliformMPN/100mL16,000
Bicarbonatemg/L372
TurbidityNTU2.4
Total alkalinitymg/L as CaCO3372
Chloridemg/L156
CODmg/L212
Kjeldahl nitrogenmg/L as N17
Ammonia nitrogenmg/L as N13
Total hardnessmg/L as CaCO3264
Calcium hardnessmg/L as CaCO3140
Calciummg/L56
Magnesium hardnessmg/L as CaCO3124
Magnesiummg/L30.1
Sodiummg/L110
Dissolved solidsmg/L762
Phosphatemg/L1.5
Potassiummg/L16
Fluoridemg/L0.3
Sodium share%46
Sodium adsorption ratio2.9
Orthophosphatemg/L4.4

Every month the state board tested it

MonthClassDissolved oxygenmg/LBODmg/LFaecal coliformMPN/100mLTotal coliformMPN/100mLSource
Jul 2026E2281,50016,000See source
Jun 2026E1.6174704,300See source
May 2026D574603,500See source
Apr 2026D5.278402,200See source
Mar 2026E1.7354004,300See source
Feb 2026E2.9138402,800See source
Jan 2026D5.453,2009,400See source
Dec 2025D5.364702,800See source
Nov 2025E2.7213402,400See source
Oct 2025D5.174309,200See source
Sep 2025D5.161502,100See source
Aug 2025D4.172202,400See source
Jul 2025D5.772602,800See source
Jun 2025D5.953102,800See source
May 2025D4.9151402,400See source
Apr 2025D5.871702,400See source
Mar 2025E3.373304,300See source
Feb 2025D6.85171,600See source
Jan 2025D6.153103,500See source
Dec 2024D5.6963920See source
Nov 2024D4.152605,400See source
Oct 2024D4.571102,400See source
Sep 2024D5.781,7007,900See source
Aug 2024D5.641,70011,000See source
Jul 2024D4.592103,500See source
Jun 2024E2.7163103,500See source
May 2024D5.342301,700See source
Apr 2024D4.1123203,500See source
Mar 2024D5.973,3007,900See source
Feb 2024D643,1009,400See source
Jan 2024D4.478,40012,000See source
Dec 2023D4.674,00035,000See source
Oct 2023D6.144605,400See source
Sep 2023D4.499,4001,60,000See source
Aug 2023D4.873109,200See source
Jul 2023D4.298,4001,60,000See source

Older tests

DateWhereReadingWater temperature°CDissolved oxygenmg/LpHConductivityµS/cmBODmg/LNitrate and nitritemg/L as NFaecal coliformMPN/100mLTotal coliformMPN/100mLSource
2021Battarahalli Lake, LakeLowest253.27.170640.43,30024,000See source
2021Battarahalli Lake, LakeHighest256.88.5949176.491,50,00016,00,000See source

Inlet and outlet tests, 2017-18 lake survey

DateWhereWater temperature°CpHConductivityµS/cmDissolved solidsmg/LSuspended solidsmg/LTurbidityNTUDissolved oxygenmg/LCODmg/LBODmg/LTotal phosphateKjeldahl nitrogenmg/L as NTotal coliformMPN/100mL
2017-11-29Inlet23.18.5943800262642424.282251,600
See source

How much is built over

Built inside the outline
0.8%

From satellite land cover, 2021

See source
Encroached area, 2017
6.08 acres

Reported by the state legislature’s committee on lake encroachment

See source
Encroached by

Private owners and the public

See source
Taken for

Garden city college & road

See source
Where it is encroached

On the west side

See source
Dumped in it

Construction debris, garbage & agriculture waste

See source
Land record maps
See source
Land within 500 m

69% built, 9% crops, 8% trees, 6% grass, 5% bare ground, 3% 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
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
Hebbal

The river basin its water drains to

See source
Overflows into

Yellamallappashetti Kere

See source
Catchment
0.6 km²

The land that drains into it

See source
Fed by, 2018 survey

Rain & drain

See source
Built parts, 2018 survey

1 overflow weir, 1 sluice gate and 1 culvert

See source
Nearest sewage treatment plant

Sewage Treatment Plant

970 m away

See source

What lives here

Birds recorded
54 species

Most seen: Black Kite, Common Myna, Indian Pond-Heron, Rock Pigeon and Asian Koel.

362 sightings, mostly from birdwatchers

See source
All wildlife recorded
55 species

363 records, 2015 to 2026

See source
Threatened species seen here
1
  • Spot-billed Pelican near threatened
See source
Photographed on iNaturalist
3 times

1 species, 1 confirmed by other naturalists.

Most seen: Little Egret.

Last seen Jun 2026

See source
Weed cover, 2018 survey

Partial

See source

Around it

Around it in 2018

Garden city college

See source

Photos

No photos of it on Wikimedia Commons yet.

Where it is

Ward 9
Bhattarahalli

ಭಟ್ಟರಹಳ್ಳಿ

Bengaluru East corporation, K.R. Pura assembly seat

See source
Village
Bhattarahalli

Bidarahalli hobli, Bengaluru East taluk, Bengaluru Urban district

See source
Land survey numbers

2

See source
Height above sea level
883 m
See source
Coordinates

13.0244° N, 77.7091° E

See source

Read more

OpenStreetMap
See source
Its number in each record
ATREE lake map
30
2018 lake survey
BUBEBDbtr_kr1-800
Lake Development Authority
LDA047
KGIS tank map
682
Water bodies census
2/12/002/276600/1302724/001
City lake monitoring site
181