Switch thirsty crops, water by drip
Where most water goes to fields, moving from paddy and sugarcane to millets, pulses or maize, and from flood to drip or sprinkler irrigation, saves more than any recharge can add.
Groundwater level in Bengaluru South
91%Critical
Almost every drop that rain puts back is being pumped out. That is the 2025 stage of groundwater extraction: water pumped out in a year as a share of what rain and other sources safely put back.
448 million m³pumped out each year (2025)
491 million m³can be taken out safely each year
Noneno yearly shortfall
93%goes to irrigation; the rest to homes and industry
Extraction since 2025
Each point is one CGWB assessment. Over-exploited means more water leaves the ground than comes back, so the water table keeps falling. Hover over or tap a point to see why it moved.
Safe · up to 70%Semi-critical · 70–90%Critical · 90–100%Over-exploited · above 100%
Show the numbers
| Year | Stage | Pumped out | Safe limit | Category | What changed |
|---|---|---|---|---|---|
| 2025 | 91.2% | 448 million m³ | 491 million m³ | Critical | First assessment in this series. |
Million m³: 1 million m³ = 100 crore litres. 2009 and 2013 used the older GEC-97 method.
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Ponds and lakes in Bengaluru South
997 of 1,213 water bodies (82%) 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 Bengaluru South…
- Ponds360
- Tanks641
- Lakes54
- Reservoirs14
- Check dams and percolation tanks1
- Others143
Source: 1st Census of Water Bodies, Ministry of Jal Shakti (counted in 2018-19, published 2023).
What will fix it here
Most of the water here goes to farming, so using less on fields matters as much as recharge.
Recharge pits and shafts in open land
Parks, campuses, warehouse yards and road sides can take recharge shafts that reach past the clay layer, so runoff that floods streets goes down to the aquifer instead.
Revive village ponds and johads
Desilting old ponds and opening their feeder channels restores natural recharge. A one-hectare pond that soaks in a metre of water over the monsoon puts back about a crore litres.
Rooftop rainwater recharge
Pipe roof water through a silt trap and filter into a recharge pit or an old borewell. Every 100 m² of roof puts back tens of thousands of litres a year, right where the pumping happens.
Check dams and contour trenches
On sloping or rocky land, small dams on seasonal streams and trenches along contours slow water down long enough for it to sink in.
Treat and reuse wastewater
Treated water from a sewage treatment plant can run flushing, gardens, cooling towers and construction, which today often draw on borewells.
Frequently asked questions
What is the groundwater level in Bengaluru South?
In the 2025 Central Ground Water Board assessment, Bengaluru South (Karnataka) pumped out 91% of the groundwater that can be safely taken out each year, which puts it in the "critical" category.
Is groundwater in Bengaluru South over-exploited?
Not yet, but it is critical: 91% of the safe yield is already used.
How can groundwater be recharged in Bengaluru South?
Rooftop rainwater harvesting into recharge pits or old borewells, recharge shafts in open land, reviving ponds, check dams, treating and reusing wastewater, and moving farms to drip irrigation and less thirsty crops.
How many ponds and lakes are there in Bengaluru South?
The first Census of Water Bodies counted 1,213 water bodies in Bengaluru South, including 360 ponds. 997 of them were not in use.
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