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.
Groundwater level in Andaman and Nicobar
2.3%Safe
Groundwater use is within safe limits here. 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. Down 0 points since 2017.
10.0 million m³pumped out each year (2025)
350 million m³can be taken out safely each year
Noneno yearly shortfall
Extraction since 2013
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 |
|---|---|---|---|---|---|
| 2013 | 1.0% | 3.7 million m³ | 378 million m³ | Safe | First assessment in this series. |
| 2017 | 2.7% | 10.0 million m³ | 330 million m³ | Safe | Pumping up 170% (4 → 10 million m³). Safe limit down 13% (378 → 330 million m³). A swing this large usually comes partly from revised estimates (a new well count or changed district boundaries), not only from changes on the ground. CGWB changed its method in 2017 (GEC-97 to GEC-2015), so part of this change comes from the new method. |
| 2020 | 2.6% | 10.0 million m³ | 280 million m³ | Safe | Pumping up 0% (10 → 10 million m³). Safe limit down 15% (330 → 280 million m³). |
| 2022 | 1.4% | 6.5 million m³ | 557 million m³ | Safe | Pumping down 35% (10 → 7 million m³). Safe limit up 99% (280 → 557 million m³). A swing this large usually comes partly from revised estimates (a new well count or changed district boundaries), not only from changes on the ground. |
| 2023 | 1.4% | – | – | Safe | Little change since 2022 (+0.0 points). |
| 2024 | 2.1% | 10.0 million m³ | 340 million m³ | Safe | Little change since 2023 (+0.7 points). |
| 2025 | 2.3% | 10.0 million m³ | 350 million m³ | Safe | Pumping up 0% (10 → 10 million m³). Safe limit up 3% (340 → 350 million m³). |
Million m³: 1 million m³ = 100 crore litres. 2009 and 2013 used the older GEC-97 method.
Loading 20 years of rainfall…
Ponds and lakes in Andaman and Nicobar
194 of 3,528 water bodies (5%) are not in use: dried up, silted, built over or polluted. Bringing them back is one of the cheapest ways to recharge groundwater.
3,528ponds, tanks, lakes and other water bodies
3,469of them are ponds (98%)
95%still in use (3,334)
59encroached upon
- Ponds3,469
- Tanks6
- Lakes5
- Reservoirs5
- Check dams and percolation tanks26
- Others17
Source: 1st Census of Water Bodies, Ministry of Jal Shakti (counted in 2018-19, published 2023).
All about the ponds and lakes in Andaman and Nicobar, district by district
What will fix it here
Groundwater here is in balance. Keeping it that way means recharging as the area builds up and paves over.
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.
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.
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.
Meter borewells and fix leaks
Metered and registered borewells, leak repairs in supply lines and water-efficient fixtures cut pumping without anyone going short.
Frequently asked questions
What is the groundwater level in Andaman and Nicobar?
In the 2025 Central Ground Water Board assessment, Andaman and Nicobar pumped out 2% of the groundwater that can be safely taken out each year, which puts it in the "safe" category. That is 0 points lower than in 2017.
Is groundwater in Andaman and Nicobar over-exploited?
No. At 2% of the safe yield, Andaman and Nicobar is safe, though recharge is still needed as demand grows.
How can groundwater be recharged in Andaman and Nicobar?
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 Andaman and Nicobar?
The first Census of Water Bodies counted 3,528 water bodies in Andaman and Nicobar, including 3,469 ponds. 194 of them were not in use.
Districts of Andaman and Nicobar
Stage of extraction in 2025, most over-pumped first.