Lakes of Bendakaluru

Satellite view: Esri, Maxar, Earthstar Geographics

Narasipura Lake-1

ನರಸಿಪುರ ಕೆರೆ

Also called Narsipura Lake, Thindlu Lake

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

See it on the map
Size
9.92 acresAbout 5.6 football pitches
Rank by size
750th 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% of the lakeSatellite, 2021. The 2018 survey found 1% encroached.
Campaign
Residents are organising here

Through the years

Nothing on record for 1928 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. 1978

    On the survey map

    See source

  3. 1984-2021

    Held water in 3 of 38 years

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

    0% of its water area has since gone dry; 15% 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. 2012

    Built

    As the 2018 lake survey records it

    See source

  5. 2012

    Restored

    See 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

    No one cover holds over half of it 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

    1% encroached, polluted, 15.8 acres surveyed

    See source

  9. 2023-2026

    Tested by the state board in 34 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

    • 76% open water
    • 23% floating weed
    • 0.3% dry or built

    Dry season, Mar 2026 to May 2026

    • 77% open water
    • 19% floating weed
    • 4% dry or built
    See source

How big it is

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

Drawn outline
9.92 acres

About 5.6 football pitches

See source
2018 lake survey
15.8 acres

About 8.9 football pitches

See source
End to end
322 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 34 times since Jul 2023
Fit only for wildlife and fish: 24 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

Sewage

See source
Sewage flows in, 2018

From the north

See source
Older tests
4 readings

From 2011 and 2021

See sourceSee 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

MeasureUnitValue
Water temperature°C25
Dissolved oxygenmg/L2.4
pH6.6
ConductivityµS/cm495
BODmg/L11
Nitratemg/L as N2
Faecal coliformMPN/100mL490
Total coliformMPN/100mL5,400
Bicarbonatemg/L108
TurbidityNTU8.3
Total alkalinitymg/L as CaCO3108
Chloridemg/L72
CODmg/L120
Kjeldahl nitrogenmg/L as N4.6
Ammonia nitrogenmg/L as N4.1
Total hardnessmg/L as CaCO3124
Calcium hardnessmg/L as CaCO368
Calciummg/L27.2
Magnesium hardnessmg/L as CaCO356
Magnesiummg/L13.6
Sulphatemg/L20
Sodiummg/L50
Dissolved solidsmg/L340
Suspended solidsmg/L12
Phosphatemg/L0.24
Potassiummg/L10
Sodium share%44
Sodium adsorption ratio1.95
Orthophosphatemg/L0.72

Every month the state board tested it

MonthClassDissolved oxygenmg/LBODmg/LFaecal coliformMPN/100mLTotal coliformMPN/100mLSource
Jul 2026E2.4114905,400See source
Jun 2026D5.945802,800See source
May 2026E395802,800See source
Apr 2026D5.463,1009,400See source
Mar 2026E3.3214003,500See source
Feb 2026D4.884603,500See source
Jan 2026E3.352702,200See source
Dec 2025D5.363902,800See source
Nov 2025D6.243302,800See source
Oct 2025D5.963803,500See source
Sep 2025D4.582104,300See source
Jul 2025E3182404,300See source
Jun 2025E3.163203,500See source
May 2025E112,60012,000See source
Apr 2025D4.671702,400See source
Mar 2025D5.159304,900See source
Feb 2025E3.2111102,400See source
Jan 2025D7.342102,800See source
Dec 2024D5.791502,400See source
Nov 2024D4.262602,200See source
Oct 2024D4.342103,500See source
Sep 2024D6.972405,400See source
Aug 2024D5.862603,500See source
Jul 2024D6.842,1009,400See source
Jun 2024D842409,200See source
May 2024E0.9282,1009,400See source
Mar 2024E2.4176,80033,000See source
Feb 2024D5.144705,400See source
Jan 2024D492,3007,900See source
Dec 2023D5.17.44,8001,60,000See source
Oct 2023D6.142,20024,000See source
Sep 2023D4.674,30092,000See source
Aug 2023D6.547,0001,60,000See source
Jul 2023D4.3949016,000See source

Older tests

DateWhereReadingChloridePhosphateSuspended solidsmg/LDissolved oxygenmg/LCODmg/LNitratemg/L as NTotal hardnessFluoridepHZincCopperManganeseE coliTotal coliformMPN/100mLWater temperature°CConductivityµS/cmBODmg/LNitrate and nitritemg/L as NFaecal coliformMPN/100mLSource
2011Thindlu Lake, Inlet95.20.26.57.256.646.081840.267.840.150.020.211,6001,600See source
2011Thindlu Lake, Outlet1060.17.552400.448.370.120.011.05See source
2021Narasipura Lake, LakeLowest1.16.524,0002530430.443,400See source
2021Narasipura Lake, LakeHighest7.17.89,20,00,00025821343.270,00,000See 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
2017-11-2822.2188.146032040354.248180.414350
See source

How much is built over

Built inside the outline
0%

From satellite land cover, 2021

See source
Encroached area, 2017
0.75 acres

Reported by the state legislature’s committee on lake encroachment

See source
Encroached by

Private owners

See source
Taken for

Fenced vacant land

See source
Where it is encroached

On the north-east side

See source
Land within 500 m

84% built, 14% trees, 2% bare ground

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
Water comes from
See source
Overflows into

Dodda Bommasandra Lake

See source
Catchment
2.1 km²

The land that drains into it

See source
Fed by, 2018 survey

Rainfall & drain

See source
Built parts, 2018 survey

3 inlet drains, 1 overflow weir, no sluice gates, 3 culverts, no check dams and 3 islands

See source
Used for, 2018 survey

Fishing

See source
Nearest sewage treatment plant

Vidyaranyapura Sewage Treatment Plant

174 m away

See source

What lives here

Birds recorded
100 species

Most seen: Indian Pond-Heron, Little Grebe, White-breasted Waterhen, Western Swamphen and Black Kite.

2,448 sightings, mostly from birdwatchers

See source
All wildlife recorded
119 species

2,473 records, 2010 to 2026

See source
Threatened species seen here
5
  • Teak endangered
  • Spot-billed Pelican near threatened
  • Indian flapshell turtle vulnerable
  • Indian Roller near threatened
  • East Indian Sandalwood vulnerable
See source
Photographed on iNaturalist
35 times

28 species, 26 confirmed by other naturalists.

Most seen: White-breasted Waterhen, Little Cormorant, Red-wattled Lapwing, Earpod Wattle and Oriental Darter.

Last seen Jul 2026

See source
Animals seen, 2018 survey

Fish and Br

See source
Water plants, 2018 survey

Emergent

See source
Weed cover, 2018 survey

Partial

See source

Around it

Around it in 2018

Buildings

See source

Photos

No photos of it on Wikimedia Commons yet.

Where it is

Ward 10
Vidyaranyapura

ವಿದ್ಯಾರಣ್ಯಪುರ

Bengaluru North corporation, Byatarayanapura assembly seat

See source
Village
Narisapura

Yelahanka hobli, Bengaluru North taluk, Bengaluru Urban district

See source
Land survey numbers

20

See source
Height above sea level
916 m
See source
Coordinates

13.0723° N, 77.5587° E

See source

Read more

OpenStreetMap
See source
Its number in each record
ATREE lake map
52
2018 lake survey
BUBNYHnrp_kr1-303
Lake Development Authority
LDA387
KGIS tank map
806
Water bodies census
2/12/002/253189/025980/001
City lake monitoring site
59