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Tamil Nadu Groundwater Crisis: 29 Districts See Sharp Decline Despite Good Rains

Groundwater levels have fallen significantly across Tamil Nadu, with 29 out of 38 districts recording a drop in February compared to last year. Dindigul and Tirupur districts saw the steepest declines of over 2.5 metres, indicating severe stress in western and central regions. Alarmingly, this depletion occurred despite the state receiving 12% above-normal rainfall in 2025. Experts attribute the trend to poor recharge and over-extraction, raising serious concerns about water sustainability ahead of the summer season.

Key Points: Tamil Nadu Groundwater Levels Drop Alarmingly in 29 Districts

  • 29 of 38 districts show decline
  • Dindigul & Tirupur fell 2.58m each
  • Happened despite 12% excess rainfall
  • Experts warn of summer water stress
2 min read

Sharp decline in groundwater levels across TN raises alarm ahead of summer

Despite excess rainfall, 29 of 38 Tamil Nadu districts report falling groundwater levels, with Dindigul and Tirupur worst hit. Experts warn of summer crisis.

"The continued decline... points to poor recharge, over-extraction, and possible inefficiencies in water management systems. - State Data Report"

Chennai, March 23

Groundwater levels across Tamil Nadu have witnessed a significant decline, with 29 out of 38 districts recording a drop in February compared to the same period last year, according to data released by the State Ground and Surface Water Resources Data Centre under the government's Water Resources Department.

The findings indicate a worsening trend in water availability despite a year of above-normal rainfall. The data shows that Dindigul and Tirupur districts recorded the steepest decline, with groundwater levels falling by 2.58 metres each. Coimbatore followed with a drop of 2.07 metres, while Salem (1.68 metres), Dharmapuri (1.62 metres), Karur (1.54 metres), and Perambalur (1.20 metres) also reported substantial decreases.

These sharp reductions point to increasing stress on groundwater reserves in the western and central regions of the state.

Several other districts experienced moderate declines. Madurai recorded a fall of 1.27 metres, while Virudhunagar and Perambalur saw drops of 1.20 metres each. Namakkal (1.08 metres) and Erode (1.10 metres) also reported noticeable reductions. In northern Tamil Nadu, Tiruvallur registered a decline of 0.99 metres, and Tiruvannamalai saw a drop of 0.85 metres, highlighting a broad-based depletion across regions.

In contrast, coastal and delta districts reported relatively marginal changes. Nagapattinam recorded the least decline at just 0.03 metres, followed by the Nilgiris (0.04 metres) and Tiruvarur (0.11 metres), suggesting comparatively stable groundwater conditions in these areas.

The extent of depletion is particularly concerning, given that Tamil Nadu received 12 per cent excess rainfall in 2025.

According to the India Meteorological Department's Chennai centre, the state recorded 1,027.7 mm of rainfall against the normal 920.9 mm. While Chengalpattu was the only district to record a rainfall deficit, ten districts received excess rainfall ranging from 20 to 59 per cent above normal, and one district reported large excess rainfall exceeding 60 per cent.

Despite this favourable rainfall pattern, the continued decline in groundwater levels points to poor recharge, over-extraction, and possible inefficiencies in water management systems.

With summer approaching, the trend raises serious concerns about water sustainability, especially in drought-prone and high-demand regions of the state.

Experts warn that unless immediate corrective measures are implemented, including improved rainwater harvesting and regulated groundwater usage, Tamil Nadu could face intensified water stress in the coming months.

- IANS

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Reader Comments

S
Shreya B
In Coimbatore, we can already feel the pinch. Water tanker prices are going up every week. All the new apartment complexes and IT parks are digging deeper and deeper. Rainwater harvesting structures are there on paper, but is anyone checking if they actually work? 🤔
A
Aman W
Respectfully, while the data is concerning, I feel the article only highlights the problem. We need more discussion on solutions. What about reviving traditional water bodies like *ooranis* and *kulams*? Community-led management worked for centuries before borewells.
P
Priya S
My family is from a village near Dindigul. The farmers are in a terrible situation. They have no choice but to pump more water for crops because there's no reliable canal supply. It's a vicious cycle. Need better surface water distribution along with recharge. 😟
M
Michael C
Working here in Chennai, the water crisis is a recurring theme. The fact that depletion is happening despite excess rain is a huge red flag. It points to systemic failure in capturing that rain. Mandatory and *audited* rainwater harvesting for every building, no exceptions.
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Nisha Z
Summer hasn't even peaked yet. I dread to think what June will be like. Time for each one of us to be more responsible at home—shorter showers, reusing water, the basics. But individual effort alone won't fix this. Policy and enforcement are key.

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