Lakes of Bendakaluru

Satellite view: Esri, Maxar, Earthstar Geographics

Annamma Kere

ಎಲಚೇನಹಳ್ಳಿ ಕೆರೆ

Also called Yelachenahalli Kere

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

See it on the map
Size
4.15 acresAbout 2.4 football pitches
Rank by size
1072nd largestOf 1,621 lakes that still exist
Valley
Vrishabhavathi
Who looks after it
KFDKarnataka Forest Department
Water quality
Fit only for wildlife and fishTested Jul 2026
Built over
16% of the lakeSatellite, 2021. The 2018 survey found 10% encroached.

Through the years

Nothing on record for 1904 to 1979 and 1981 to 1983.

The records listed below, drawn on one line from 1903 to 2026.

  1. 1903

    Built

    As the 2018 lake survey records it

    See source

  2. 1980

    On the survey map

    See source

  3. 1984-2021

    Held water in 23 of 38 years

    Water in 8% of all satellite passes, 1984-2024

    0% of its water area has since gone dry; 33% is new water

    Floating weed looks like dry land to this record, so a weed-covered year can read as dry

    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 built on or bare 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

    10% encroached, polluted, 7.80 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; part open water, part floating weed in the dry season

    After monsoon, Oct 2025 to Dec 2025

    • 51% open water
    • 46% floating weed
    • 3% dry or built

    Dry season, Mar 2026 to May 2026

    • 48% open water
    • 33% floating weed
    • 19% dry or built
    See source

How big it is

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

Drawn outline
4.15 acres

About 2.4 football pitches

See source
2018 lake survey
7.80 acres

About 4.4 football pitches

See source
End to end
191 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: 33 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-east

See source
Older tests
2 readings

From 2021

See source
Every reading
Show every reading

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

MeasureUnitValue
Water temperature°C29
Dissolved oxygenmg/L4.3
pH7.5
ConductivityµS/cm680
BODmg/L6
Nitratemg/L as N2.61
Faecal coliformMPN/100mL700
Total coliformMPN/100mL3,500
Bicarbonatemg/L260
TurbidityNTU33.1
Total alkalinitymg/L as CaCO3260
Chloridemg/L40
CODmg/L68
Ammonia nitrogenmg/L as N0.6
Total hardnessmg/L as CaCO3140
Calcium hardnessmg/L as CaCO3110
Calciummg/L44
Magnesium hardnessmg/L as CaCO330
Magnesiummg/L7.3
Sulphatemg/L40
Sodiummg/L68
Dissolved solidsmg/L456
Suspended solidsmg/L44
Phosphatemg/L0.42
Potassiummg/L7
Fluoridemg/L0.34
Sodium share%50
Sodium adsorption ratio2.5
Orthophosphatemg/L0.98

Every month the state board tested it

MonthClassDissolved oxygenmg/LBODmg/LFaecal coliformMPN/100mLTotal coliformMPN/100mLSource
Jul 2026D4.367003,500See source
Jun 2026D5.352702,400See source
May 2026D5.257902,200See source
Apr 2026D473804,300See source
Mar 2026E1.7202605,400See source
Feb 2026D5.374703,500See source
Jan 2026D5.683102,200See source
Dec 2025E3.2183303,500See source
Nov 2025D664302,800See source
Oct 2025D6.143302,200See source
Sep 2025D5.483102,800See source
Aug 2025D4.191703,500See source
Jul 2025D5.851702,400See source
Jun 2025D6.842403,500See source
May 2025D562602,200See source
Apr 2025D5.872602,800See source
Mar 2025D5.652601,500See source
Feb 2025D6.343104,300See source
Jan 2025D4.541,4004,800See source
Dec 2024D5.953301,700See source
Nov 2024D6.579307,900See source
Oct 2024D5.941,4007,900See source
Sep 2024D4.891704,300See source
Aug 2024D5.153103,500See source
Jul 2024D4.691703,500See source
Jun 2024D672,6009,400See source
May 2024E1.4282,3007,000See source
Apr 2024D5.361,7007,900See source
Mar 2024D4.751,7004,800See source
Feb 2024D5.742,70013,000See source
Jan 2024D5.151,1004,900See source
Dec 2023DSee source
Oct 2023D6.943105,400See source
Sep 2023D4.383,20054,000See source
Aug 2023D4.4107,90092,000See source
Jul 2023D4.744,30054,000See source

Older tests

DateWhereReadingWater temperature°CDissolved oxygenmg/LpHConductivityµS/cmBODmg/LNitrate and nitritemg/L as NFaecal coliformMPN/100mLTotal coliformMPN/100mLSource
2021Annayappa Tank, TankLowest2546.517330.34,10024,000See source
2021Annayappa Tank, TankHighest2578.149381.5346,0005,40,000See source

How much is built over

Built inside the outline
16%

From satellite land cover, 2021

See source
Encroached area, 2017
0.79 acres

Reported by the state legislature’s committee on lake encroachment

See source
Encroached by

Government agencies, the public and private owners

See source
Taken for

Temple, building & school

See source
Where it is encroached

On the north and north-west side

See source
Dumped in it

Garbage, construction debris, poultry & plastic wastes

See source
Other problems noted

RTC-Sy no 6/-p1 is in name of the individual-1.0 a-g

See source
Land record maps
See source
Land within 500 m

90% built, 9% trees, 0.5% crops

From satellite land cover, 2021

See source

Who looks after it

Looked after by
Karnataka Forest Department

KFD

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
Vrishabhavathi

The river basin its water drains to

See source
Overflows into

Doraikere

See source
Catchment
0.5 km²

The land that drains into it

See source
Fed by, 2018 survey

Rainfall, & drain

See source
Built parts, 2018 survey

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

See source
Used for, 2018 survey

Cattle feeding

See source
Nearest sewage treatment plant

Sarakki 5MLD Sewage Treatment Plant

1.1 km away, treats 5 million litres a day

See source

What lives here

Birds recorded
61 species

Most seen: Indian Pond-Heron, Black Kite, Eurasian Coot, Little Grebe and Rock Pigeon.

602 sightings, mostly from birdwatchers

See source
All wildlife recorded
61 species

602 records, 2016 to 2024

See source
Photographed on iNaturalist
1 times

1 species, 1 confirmed by other naturalists.

Most seen: Little Cormorant.

Last seen Apr 2023

See source
Animals seen, 2018 survey

Birds

See source
Water plants, 2018 survey

Emergent, submerged and rooted floating

See source
Weed cover, 2018 survey

Partial

See source

Around it

Around it in 2018

School, temple & apartment

See source
Surveyor's note, 2018

Mr. Vinaya Kumar, IFS (3.11.16)

See source

Photos

No photos of it on Wikimedia Commons yet.

Where it is

Ward 46
Yelachenahalli

ಯೆಲಚೇನಹಳ್ಳಿ

Bengaluru South corporation, Bangalore South assembly seat

See source
Village
Yelachenahalli

Uttarahalli hobli, Bengaluru South taluk, Bengaluru Urban district

See source
Land survey numbers

6 (Yalachenahalli), 14 (Gopinayakanahalli)

See source
Height above sea level
911 m
See source
Coordinates

12.8997° N, 77.5656° E

See source

Read more

OpenStreetMap
See source
Its number in each record
ATREE lake map
476
2018 lake survey
BUBSUHylc_kr2-1391
KGIS tank map
1038
Water bodies census
2/12/002/276600/1302857/001
City lake monitoring site
142