Lakes of Bendakaluru

Satellite view: Esri, Maxar, Earthstar Geographics

B.Narayanapura Kere

ನಾರಾಯಣಪುರ ಕೆರೆ

Also called B Narayanapura Lake

Kere, a large tank, in A Narayanapura ward, Bengaluru East

See it on the map
Size
2.94 acresAbout 1.7 football pitches
Rank by size
1169th largestOf 1,621 lakes that still exist
Valley
Koramangala-Challaghatta
Who looks after it
BBMPBruhat Bengaluru Mahanagara Palike
Water quality
Fit only for irrigationTested Jul 2026
Built over
3% of the lakeSatellite, 2021. The 2018 survey found 10% encroached.
Campaign
Residents are organising here

Through the years

Nothing on record for 1958 to 1979 and 1981 to 1983.

The records listed below, drawn on one line from 1957 to 2026.

  1. 1957

    Built

    As the 2018 lake survey records it

    See source

  2. 1980

    Not on the survey map

    See source

  3. 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; 6% 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. 2013

    Restored

    See 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

    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

  7. 2018

    Still there in the 2018 lake survey

    10% encroached, sewage, 15.2 acres surveyed

    See source

  8. 2024

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

    See source

  9. 2025-2026

    Tested by the state board in 16 months, most often fit only for irrigation

    Apr 2025 to Jul 2026

    See every testSee source

  10. 2025-2026

    Mostly floating weed after the monsoon; mostly dry or built in the dry season

    After monsoon, Oct 2025 to Dec 2025

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

    Dry season, Mar 2026 to May 2026

    • 15% open water
    • 2% floating weed
    • 84% dry or built
    See source

How big it is

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

Drawn outline
2.94 acres

About 1.7 football pitches

See source
2018 lake survey
15.2 acres

About 8.6 football pitches

See source
End to end
205 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 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 16 times since Apr 2025
Fit only for wildlife and fish: 4 months. Fit only for irrigation: 12 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
Sewage
See source
What pollutes it, 2018

Sewage

See source
Sewage flows in, 2018

From the north, east and south-west

See source
Every reading
Show every reading

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

MeasureUnitValue
Water temperature°C25
Dissolved oxygenmg/L0.7
pH6.9
ConductivityµS/cm780
BODmg/L19
Nitratemg/L as N2.8
Faecal coliformMPN/100mL1,100
Total coliformMPN/100mL16,000
Bicarbonatemg/L168
TurbidityNTU38
Total alkalinitymg/L as CaCO3168
Chloridemg/L124
CODmg/L121
Kjeldahl nitrogenmg/L as N20
Ammonia nitrogenmg/L as N15
Total hardnessmg/L as CaCO3204
Calcium hardnessmg/L as CaCO3112
Calciummg/L44.8
Magnesium hardnessmg/L as CaCO392
Magnesiummg/L22.4
Sodiummg/L71
Dissolved solidsmg/L530
Suspended solidsmg/L44
Phosphatemg/L0.22
Potassiummg/L4
Fluoridemg/L0.33
Sodium share%34
Sodium adsorption ratio2.2
Orthophosphatemg/L0.6

Every month the state board tested it

MonthClassDissolved oxygenmg/LBODmg/LFaecal coliformMPN/100mLTotal coliformMPN/100mLSource
Jul 2026E0.7191,10016,000See source
Jun 2026D576302,200See source
May 2026E2.3263302,100See source
Apr 2026D4.262104,300See source
Mar 2026D5.252,2007,900See source
Feb 2026E2.12943540See source
Jan 2026E3194302,800See source
Dec 2025E1.3543102,800See source
Nov 2025E2272,0009,400See source
Oct 2025E5.962602,100See source
Sep 2025E3223103,500See source
Aug 2025E3203,30024,000See source
Jul 2025E3.2162,6008,400See source
Jun 2025D5.353,30011,000See source
May 2025E3.2141302,400See source
Apr 2025E2.2232,4004,800See source

How much is built over

Built inside the outline
3%

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

Government agencies

See source
Taken for

Outer ring road

See source
Where it is encroached

On the center, of and lake side

See source
Dumped in it

Burning waste, garbage & construction debris

See source
Other problems noted

As per RTC, 0.26g is for BDA

See source
Land within 500 m

87% built, 8% trees, 3% crops, 2% shrubs, 0.9% grass

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
Koramangala-Challaghatta

The river basin its water drains to

See source
Overflows into

Bande Mahadevapura Kere

See source
Catchment
0.6 km²

The land that drains into it

See source
Fed by, 2018 survey

Rain & drain fed

See source
Built parts, 2018 survey

5 inlet drains, no overflow weirs, no sluice gates, 4 culverts, no check dams and 2 islands

See source
Nearest sewage treatment plant

Kaggadasapura STP

2.0 km away

See source

What lives here

Birds recorded
12 species

Most seen: Rock Pigeon, Black Kite, Rose-ringed Parakeet, Jungle Myna and Common Myna.

15 sightings, mostly from birdwatchers

See source
All wildlife recorded
12 species

15 records, 2018 to 2024

See source
Photographed on iNaturalist
1 times

Last seen Aug 2026

See source
Animals seen, 2018 survey

Birds and butterflies

See source
Water plants, 2018 survey

Emergent

See source
Weed cover, 2018 survey

Partial

See source

Around it

Around it in 2018

Vacant land, Outer ring road, building & temple

See source

Photos

No photos of it on Wikimedia Commons yet.

Where it is

Ward 20
A Narayanapura

ಎ ನಾರಾಯಣಪುರ

Bengaluru East corporation, K.R. Pura assembly seat

See source
Village
Byatarayanapur a Narayanapura (B.Narayanapura)

KR Puram hobli, Bengaluru East taluk, Bengaluru Urban district

See source
Land survey numbers

109

See source
Height above sea level
894 m
See source
Coordinates

12.9964° N, 77.6828° E

See source

Read more

OpenStreetMap
See source
Its number in each record
ATREE lake map
96
2018 lake survey
BUBEKRbnp_kr1-674
Lake Development Authority
LDA022
KGIS tank map
663
Water bodies census
2/12/002/253189/026027/001
City lake monitoring site
179