Survey
Map the pond's full original area, its inlets and its catchment, and record encroachments and sewage outfalls.
Ponds and lakes in Kollam
2,278ponds, out of 2,352 water bodies
The 1st Census of Water Bodies counted 2,352 ponds, tanks, lakes and other water bodies in Kollam district. 508 of them (22%) were not in use and 0 had been encroached upon. Kollam has the 12th most ponds of the 14 districts in Kerala the census counted.
Every water body the census counted in Kollam
508 of 2,352 water bodies (22%) are not in use: dried up, silted, built over or polluted. Bringing them back is one of the cheapest ways to recharge groundwater.
Loading the map of water bodies in Kollam…
- Ponds2,278
- Tanks37
- Lakes1
- Reservoirs1
- Check dams and percolation tanks15
- Others20
Source: 1st Census of Water Bodies, Ministry of Jal Shakti (counted in 2018-19, published 2023).
Why Kollam's ponds matter for its groundwater
47%Safe
Kollam pumps out 47% of the groundwater that can safely be taken out each year (2025, Central Ground Water Board), which the board rates safe. Working ponds are a large part of what keeps it there, by letting rain soak back into the ground.
Bringing a pond in Kollam back
Most ponds that are not in use can be revived. The work is the same in a village or a city sector:
Desilt
Dig out the silt that has sealed the bed, so water soaks into the ground again instead of evaporating.
Reconnect
Clear and line the channels that bring rain in, with a silt trap before the pond; divert sewage away from it.
Recharge
Add recharge shafts or wells in the bed where the soil is tight, so water reaches the aquifer faster.
Protect
Fence or plant the banks, mark the boundary and hand upkeep to the panchayat or residents' body.
Frequently asked questions
How many ponds are there in Kollam?
The 1st Census of Water Bodies (Ministry of Jal Shakti, counted in 2018-19, published 2023) counted 2,278 ponds in Kollam district, out of 2,352 water bodies in all. That is the 12th most ponds of 14 districts in Kerala counted by the census.
How many lakes are there in Kollam?
The 1st Census of Water Bodies counted 1 lake and 1 reservoir in Kollam district, along with 37 tanks.
How many water bodies in Kollam are not in use?
508 of the 2,352 water bodies (22%) were not in use when counted: dried up, silted, cut off from their catchment, polluted or built over. 0 had been encroached upon.
How do ponds help groundwater in Kollam?
A working pond holds rain long enough for it to soak into the ground and refill wells and borewells nearby. A silted or encroached pond sends that rain down the drain instead. Desilting, reopening inlets and adding recharge shafts in the pond bed are among the cheapest ways to recharge groundwater.
Is groundwater in Kollam running out?
In the 2025 Central Ground Water Board assessment, Kollam district pumped out 47% of the groundwater that can safely be taken out each year ("safe").
Ponds in other districts of Kerala
Districts ranked by number of ponds in the 1st Census of Water Bodies.
- 1Palakkad5,988 water bodies, 16% not in use5,795
- 2Kozhikkode6,192 water bodies, 21% not in use5,711
- 3Malappuram5,983 water bodies, 15% not in use5,185
- 4Thrissur5,023 water bodies, 13% not in use4,926
- 5Kannur5,314 water bodies, 14% not in use4,699
- 6Alappuzha4,239 water bodies, 28% not in use4,219
- 7Ernakulam4,416 water bodies, 16% not in use4,042
- 8Idukki3,792 water bodies, 6% not in use3,307
- 9Kottayam3,506 water bodies, 20% not in use3,052
- 10Thiruvananthapuram2,649 water bodies, 15% not in use2,548
- 11Kasargod2,880 water bodies, 16% not in use2,431
- 12Wayanad1,943 water bodies, 11% not in use1,434
- 13Pathanamthitta1,457 water bodies, 12% not in use1,380