Survey No. 109 · Bellandur · Bengaluru
ಕೆರೆkere: Kannada for lake
Our 18.6-acre lake off Sarjapur Road is covered in algae, and waste is piling up on its banks. On 31 October 2026, residents walked the lake and recorded what they saw. Here is the evidence, what we are asking the city to do, and how you can help.
Bengaluru East City Corporation is one of five corporations under the Greater Bengaluru Authority, formed on 2 September 2025. Before that, the lake was looked after by BBMP.
Residents walked the lake on the morning of 31 October 2026. We recorded 11 photos and 10 videos, all geotagged. Five problems stood out. Their numbers match the map below. Tap any photo to see it larger.
Site walk31 Oct 202608:41–09:00 IST11 photos10 videosGeotagged
Water is entering the lake over the weir at the north-east inlet channel. This is the most likely source of the nutrients that feed the algae. Cleaning alone won't last while this inflow continues.
Inlet weir12.91306, 77.69539
A thick green mat of algae covers the east arm and much of the main water body. In the east arm, we saw a circular up-welling breaking the surface. It may be a submerged outfall.
East arm12.91159, 77.69513Main water12.91174, 77.69206
Plastic is trapped against the culvert under the walkway, and more has collected along the stone pitching on the west shore. On the north shore there is sludge, with bottles, sacks and a crate at the water's edge.
West shore12.91012, 77.69257
The kalyani is the stepped tank by the lake, used for idol immersions. After the festival immersions it still holds broken idol remains and floating waste.
Kalyani12.91181, 77.69533
One dump is beside the kalyani fence. The other is a long strip along the north path, inside the fence, and part of it has been burnt.
North-path dump12.91303, 77.69514
Each point is placed from the GPS tags on our photos, to scale and with north up. We have not drawn the lake's outline. Open Google Maps to see the lake itself.
Algae need food. Sewage, raw or treated, gives them plenty.
Raw or treated sewage enters the water.
Sewage carries nitrogen and phosphorus.
The nutrients feed algae, which spread across the surface.
Algae push oxygen levels up and down. That can kill fish.
Some blooms are cyanobacteria, also called blue-green algae. They can produce toxins harmful to fish, birds, pets and people.
Cleaning alone won't last unless the inflow stops.
Source: “Why are Bengaluru lakes green in colour?”, an explainer by Priyanka Jamwal et al. in Citizen Matters.
Five requests to the agencies responsible for the lake. We want to work with them to fix the cause, not only the symptoms.
BWSSB and the corporation trace where the north-east inlet's water comes from, then divert or treat it, with a date for the work.
The corporation removes the algae, weeds and floating litter, and cleans the kalyani.
Both dump spots are cleared. Re-dumping is stopped with signboards, CCTV or a marshal, and penalties.
Tell residents who the lake's maintenance contractor is and what the contract covers.
A joint site inspection by officials and residents.
We are doing this in the open. Every step we take, and every reply we get from the agencies, goes on this page with a date. Four phases take us from putting the problem on record to keeping the lake clean for good.
What we have asked each agency to do, and how long we have been waiting for a reply.
Coming up first, then what is happening now, then what is done.
Get updates, clean-up dates and requests for help in one place.
Volunteers work from the banks only, never in the water.
Take a photo, note the location, and report it to:
Ask your apartment's residents' association to sign the joint letter to the agencies.
Our email address will be posted here soon.
Forward it to your building's group. Here is a short message to send with the link.
We are residents living around Doddakannelli Kere, on Doddakannelli–Bellandur Road and in the neighbouring societies.
We want to work with the agencies responsible for the lake: Bengaluru East City Corporation, BWSSB and KSPCB. Our aim is a clean lake that stays clean, with residents helping to look after it.