Lakes of Bendakaluru

Satellite view: Esri, Maxar, Earthstar Geographics

Kannamangala Kere

ಕನ್ನಮಂಗಲ ಕೆರೆ

Also called Kannamangala Lake

Kere, a large tank, in Kannamangala village, Bengaluru East taluk

See it on the map
Size
5.22 acresAbout 3 football pitches
Rank by size
1010th largestOf 1,621 lakes that still exist
Valley
Dakshina Pinakini
Who looks after it
ZPZilla Panchayat
Water quality
Fit only for wildlife and fishTested Jul 2026
Built over
1% of the lakeSatellite land cover, 2021

Through the years

Nothing on record for 1915 to 1919, 1921 to 1973 and 1975 to 1983.

The records listed below, drawn on one line from 1914 to 2026.

  1. 1914

    Not on the survey map

    See source

  2. 1920

    Built

    As the 2018 lake survey records it

    See source

  3. 1974

    On the survey map

    See source

  4. 1984-2021

    Held water in 11 of 38 years

    Water in 4% of all satellite passes, 1984-2024

    0% of its water area has since gone dry; 27% is new water

    See sourceSee 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

    Clean, 17.6 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. 2025-2026

    Mostly open water after the monsoon and in the dry season

    After monsoon, Oct 2025 to Dec 2025

    • 90% open water
    • 8% floating weed
    • 2% dry or built

    Dry season, Mar 2026 to May 2026

    • 80% open water
    • 12% floating weed
    • 8% dry or built
    See source

How big it is

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

Drawn outline
5.22 acres

About 3 football pitches

See source
2018 lake survey
17.6 acres

About 10 football pitches

See source
End to end
221 m

The longest straight line across the outline

See source
Deepest point, 2018
2.5 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 36 times since Jul 2023
Fit only for wildlife and fish: 22 months. Fit only for irrigation: 14 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
Clean
See source
What pollutes it, 2018

Agriculture runoff

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, nitrite, phenolphthalein alkalinity

MeasureUnitValue
Water temperature°C25
Dissolved oxygenmg/L0.4
pH7.2
ConductivityµS/cm1,745
BODmg/L12
Nitratemg/L as N6.8
Faecal coliformMPN/100mL840
Total coliformMPN/100mL16,000
Bicarbonatemg/L408
TurbidityNTU12
Total alkalinitymg/L as CaCO3408
Chloridemg/L304
CODmg/L124
Kjeldahl nitrogenmg/L as N4.4
Ammonia nitrogenmg/L as N3.4
Total hardnessmg/L as CaCO3476
Calcium hardnessmg/L as CaCO3248
Calciummg/L99.2
Magnesium hardnessmg/L as CaCO3228
Magnesiummg/L55.4
Sulphatemg/L76
Sodiummg/L176
Dissolved solidsmg/L1,184
Suspended solidsmg/L18
Phosphatemg/L0.53
Potassiummg/L12
Fluoridemg/L0.24
Sodium share%35
Sodium adsorption ratio3.5
Orthophosphatemg/L1.55

Every month the state board tested it

MonthClassDissolved oxygenmg/LBODmg/LFaecal coliformMPN/100mLTotal coliformMPN/100mLSource
Jul 2026D0.41284016,000See source
Jun 2026D5.75941,600See source
May 2026E2193,1006,300See source
Apr 2026E2.2254603,500See source
Mar 2026D4.363402,400See source
Feb 2026E37070350See source
Jan 2026E0.8323,30013,000See source
Dec 2025D5.464302,200See source
Nov 2025D5.552,60054,000See source
Oct 2025E2.4182102,800See source
Sep 2025D5.663104,300See source
Aug 2025E0.6382,3007,900See source
Jul 2025D5.462101,200See source
Jun 2025D5.662304,300See source
May 2025D5139,10058,000See source
Apr 2025D4.682,10013,000See source
Mar 2025E3.51726,00063,000See source
Feb 2025D6.472504,300See source
Jan 2025E2.3141104,300See source
Dec 2024E3.2161703,500See source
Nov 2024D4.653102,800See source
Oct 2024D482002,800See source
Sep 2024D5.974305,400See source
Aug 2024D5.242303,500See source
Jul 2024D4.481,7007,000See source
Jun 2024E2.2171,40013,000See source
May 2024E3.216See source
Apr 2024D4.2132,1007,000See source
Mar 2024D4.283,40013,000See source
Feb 2024E3.4222,6007,000See source
Jan 2024D4.393,1007,000See source
Dec 2023D5.267,90035,000See source
Oct 2023D6.144805,400See source
Sep 2023E3.2134,30054,000See source
Aug 2023D5.144,90054,000See source
Jul 2023E3.2219,4001,60,000See 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
2017-11-2928258.256834461.862.83.817642.20.191,600
See source

How much is built over

Built inside the outline
1%

From satellite land cover, 2021

See source
Encroached area, 2017
1.93 acres

Reported by the state legislature’s committee on lake encroachment

See source
Dumped in it

Garbage, ash & plastic waste

See source
Other problems noted

Soil excavation

See source
Land record maps
See source
Land within 500 m

53% crops, 19% trees, 15% built, 9% shrubs, 3% grass, 1% water, 0.7% bare ground

From satellite land cover, 2021

See source

Who looks after it

Looked after by
Zilla Panchayat

ZP

See source

Where its water comes from and goes

Valley
Dakshina Pinakini

The river basin its water drains to

See source
Catchment
1.3 km²

The land that drains into it

See source
Fed by, 2018 survey

Rainfall

See source
Built parts, 2018 survey

2 inlet drains and 1 sluice gate

See source
Used for, 2018 survey

Irrigation and cattle feeding

See source

What lives here

Birds recorded
37 species

Most seen: White-throated Kingfisher, Common Myna, White-breasted Waterhen, Spot-billed duck and Gray Heron.

38 sightings, mostly from birdwatchers

See source
All wildlife recorded
47 species

50 records, 2021 to 2025

See source
Photographed on iNaturalist
32 times

19 species, 13 confirmed by other naturalists.

Most seen: Madras Pea Pumpkin, Indian beech tree, Common Castor Butterfly, Indian Black Ant and Bushveld Moonseed Creeper.

Last seen Aug 2026

See source
Animals seen, 2018 survey

Birds, butterflies and dragonflies

See source
Water plants, 2018 survey

Submerged and free floating

See source
Weed cover, 2018 survey

Partial

See source

Around it

Around it in 2018

Agriculture, plantation & brick factory

See source

Photos

No photos of it on Wikimedia Commons yet.

Where it is

Greater Bengaluru
Outside the city limits
See source
Village
Kannamangala

Bidarahalli hobli, Bengaluru East taluk, Bengaluru Urban district

See source
Land survey numbers

31

See source
Height above sea level
871 m
See source
Coordinates

13.0297° N, 77.7747° E

See source

Read more

OpenStreetMap
See source
Its number in each record
2018 lake survey
BUBEBDknm_kr1-858
KGIS tank map
57