Lakes of Bendakaluru

Satellite view: Esri, Maxar, Earthstar Geographics

Amruthahalli Lake

ಅಮೃತಹಳ್ಳಿ ಕೆರೆ

Also called Amruthalli Lake

Kere, a large tank, in Amruthahalli ward, Bengaluru North

See it on the map
Size
20.3 acresAbout 11 football pitches
Rank by size
455th 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
2% of the lakeSatellite, 2021. The 2018 survey found 1% encroached.
Campaign
Residents are organising here

Through the years

Nothing on record for 1903 to 1926, 1928 to 1954, 1956 to 1977 and 1979 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. 1927

    On the survey map

    See source

  3. 1955

    On the U.S. Army map

    Compiled from Survey of India maps of 1945-46

    See source

  4. 1978

    On the survey map

    See source

  5. 1984-2021

    Held water in 5 of 38 years

    Water in 1% of all satellite passes, 1984-2024

    0% of its water area has since gone dry; 17% is new water

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

    See sourceSee source

  6. 2016

    Restored

    See source

  7. 2017-2018

    In the water bodies census, not marked as encroached

    This census's status marks are often wrong

    See source

  8. 2017-2025

    Mostly built on or bare from 2023

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

    See source

  9. 2018

    Still there in the 2018 lake survey

    1% encroached, polluted, 24.9 acres surveyed

    See source

  10. 2023-2026

    Tested by the state board in 29 months, most often fit only for wildlife and fish

    Dec 2023 to Jul 2026

    See every testSee source

  11. 2024

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

    See source

  12. 2025-2026

    Mostly floating weed after the monsoon; part open water, part floating weed in the dry season

    After monsoon, Oct 2025 to Dec 2025

    • 37% open water
    • 53% floating weed
    • 10% dry or built

    Dry season, Mar 2026 to May 2026

    • 49% open water
    • 27% floating weed
    • 25% dry or built
    See source

How big it is

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

Drawn outline
20.3 acres

About 11 football pitches

See source
2018 lake survey
24.9 acres

About 14 football pitches

See source
End to end
469 m

The longest straight line across the outline

See source
Deepest point, 2018
0.5 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 29 times since Dec 2023
Fit only for wildlife and fish: 19 months. Fit only for irrigation: 10 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

S & cattle wading

See source
Sewage flows in, 2018

From the 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, nitrite, phenolphthalein alkalinity, suspended solids

MeasureUnitValue
Water temperature°C25
Dissolved oxygenmg/L1.7
pH6.5
ConductivityµS/cm492
BODmg/L15
Nitratemg/L as N1.9
Faecal coliformMPN/100mL1,100
Total coliformMPN/100mL9,200
Bicarbonatemg/L104
TurbidityNTU8.1
Total alkalinitymg/L as CaCO3104
Chloridemg/L68
CODmg/L152
Kjeldahl nitrogenmg/L as N5.4
Ammonia nitrogenmg/L as N4.9
Total hardnessmg/L as CaCO3120
Calcium hardnessmg/L as CaCO364
Calciummg/L25.6
Magnesium hardnessmg/L as CaCO356
Magnesiummg/L13.6
Sulphatemg/L22
Sodiummg/L49
Dissolved solidsmg/L336
Phosphatemg/L0.35
Potassiummg/L9
Sodium share%44
Sodium adsorption ratio1.95
Orthophosphatemg/L1.01

Every month the state board tested it

MonthClassDissolved oxygenmg/LBODmg/LFaecal coliformMPN/100mLTotal coliformMPN/100mLSource
Jul 2026E1.7151,1009,200See source
Jun 2026E1.7124601,700See source
May 2026D5.643302,400See source
Apr 2026E1.9386302,200See source
Mar 2026D5.863101,500See source
Feb 2026E1.9424909,200See source
Jan 2026E1.8142403,500See source
Dec 2025E2.6143,1008,400See source
Nov 2025E3.5122,60011,000See source
Oct 2025D644905,400See source
Sep 2025D5.852202,400See source
Jul 2025D5.171302,400See source
Jun 2025D5.9614,00046,000See source
May 2025E3.762,10017,000See source
Apr 2025D5.759,10058,000See source
Mar 2025D4.281,3008,400See source
Feb 2025E2.3113,1007,000See source
Jan 2025D4.953103,500See source
Dec 2024D5.69171,600See source
Nov 2024D4.481702,400See source
Oct 2024D5.873203,500See source
Sep 2024D742009,200See source
Aug 2024D4.6712,00070,000See source
Jul 2024D6.641,70013,000See source
Jun 2024D7.745809,200See source
May 2024E0.7213,10017,000See source
Feb 2024D5.342,2007,900See source
Jan 2024D4.294,3009,400See source
Dec 2023D5.17.34,70054,000See source

Older tests

DateWhereReadingWater temperature°CDissolved oxygenmg/LpHConductivityµS/cmBODmg/LNitrate and nitritemg/L as NFaecal coliformMPN/100mLTotal coliformMPN/100mLSource
2021Amruthahalli Lake, LakeLowest254.26.644930.32,30024,000See source
2021Amruthahalli Lake, LakeHighest256.67.696382.611,00,00035,00,000See 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
2017-11-1527.1126.7535340306.84.66415.40.57900
See source

How much is built over

Built inside the outline
2%

From satellite land cover, 2021

See source
Encroached by

The public

See source
Taken for

Graveyard

See source
Where it is encroached

On the north side

See source
Dumped in it

Garbage & construction debris

See source
Other problems noted

Under Rejuvenation

See source
Land within 500 m

84% built, 8% trees, 3% crops, 3% grass, 2% bare ground, 1% shrubs

From satellite land cover, 2021

See source

Who looks after it

Looked after by
Bruhat Bengaluru Mahanagara Palike

BBMP

See source
City lake page

Open its page on the city’s lake monitoring site

See source
Campaign pages
See source

Where its water comes from and goes

Valley
Hebbal

The river basin its water drains to

See source
Overflows into

Rachenahalli Lake

See source
Catchment
3.6 km²

The land that drains into it

See source
Fed by, 2018 survey

Rain & drain fed

See source
Built parts, 2018 survey

4 inlet drains, 1 overflow weir, no sluice gates, no culverts, no check dams and no islands

See source
Used for, 2018 survey

Cattle feeding

See source
Nearest sewage treatment plant

Rachenahalli 10MLD Sewage Treatment Planet

1.6 km away, treats 10 million litres a day

See source

What lives here

Birds recorded
87 species

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

1,054 sightings, mostly from birdwatchers

See source
All wildlife recorded
87 species

1,054 records, 2011 to 2026

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

6 species, 6 confirmed by other naturalists.

Most seen: Gray-headed Swamphen, Grey Heron, Indian Pond-Heron, Taro and Little Egret.

Last seen Aug 2026

See source
Animals seen, 2018 survey

Birds, butterflies and dragonflies

See source
Water plants, 2018 survey

Emergent and free floating

See source
Weed cover, 2018 survey

Partial

See source

Around it

Around it in 2018

Settlement & plantation

See source

Photos

Amruthahalli Lake, photographed in 2021
Revathi Telugu / CC BY-SA 4.0 / Wikimedia Commons, 2021
Amruthahalli Lake, photographed in 2021
Revathi Telugu / CC BY-SA 4.0 / Wikimedia Commons, 2021
Amruthahalli Lake, photographed in 2021
Revathi Telugu / CC BY-SA 4.0 / Wikimedia Commons, 2021
Amruthahalli Lake, photographed in 2021
Revathi Telugu / CC BY-SA 4.0 / Wikimedia Commons, 2021
Amruthahalli Lake, photographed in 2020
Revathi Telugu / CC BY-SA 4.0 / Wikimedia Commons, 2020
Amruthahalli Lake, photographed in 2020
Revathi Telugu / CC BY-SA 4.0 / Wikimedia Commons, 2020
Amruthahalli Lake, photographed in 2020
Revathi Telugu / CC BY-SA 4.0 / Wikimedia Commons, 2020
Amruthahalli Lake, photographed in 2020
Revathi Telugu / CC BY-SA 4.0 / Wikimedia Commons, 2020

Where it is

Ward 16
Amruthahalli

ಅಮೃತಹಳ್ಳಿ

Bengaluru North corporation, Byatarayanapura assembly seat

See source
Village
Amruthahalli

Yelahanka hobli, Bengaluru North taluk, Bengaluru Urban district

See source
Land survey numbers

115

See source
Height above sea level
920 m
See source
Coordinates

13.0615° N, 77.5979° E

See source

Read more

OpenStreetMap
See source
Its number in each record
ATREE lake map
28
2018 lake survey
BUBNYHamt_kr2-238
Lake Development Authority
LDA014
KGIS tank map
740
Water bodies census
2/12/002/253189/025978/001
City lake monitoring site
63