Water seepage raises concerns at Jaipur’s Jantar Mantar, key instruments at risk

Jaipur: Jaipur’s 18th-century Jantar Mantar, a UNESCO World Heritage Site, is facing a quiet but serious problem — water seepage is beginning to affect parts of the historic complex. Experts say that if not addressed in time, it could weaken the structures and even impact the accuracy of its astronomical instruments.

The concern is not just about the buildings but also about iconic instruments like the Samrat Yantra, Jai Prakash Yantra, Ram Yantra and Narivalaya Yantra, which are central to the monument’s scientific significance.

Officials from the Department of Archaeology and Museums (DAM) admit that the issue exists and say efforts are underway but also acknowledge that more needs to be done. They pointed out that despite its global recognition, Jantar Mantar has not been fully utilised as a major tourist draw.

Achal Pandya, HOD (Conservation) at the Indira Gandhi National Centre for the Arts, whose team recently studied the site, said the problem runs deeper than what is visible.

“The structure is built using red sandstone, marble and metals like iron and lead, along with lime mortar. We found salt deposits forming between joints, which clearly shows that water is seeping inside,” he said.

He added that routine maintenance alone will not be enough. “We need proper scientific assessment — using tools like internal cameras and monitoring systems — to understand how much damage has already been done,” he explained.

Neeraj Tripathi, superintendent, Jaipur, DAM, said the department has taken note of the issue. “We are aware of the problem and are working towards improving the situation through conservation measures,” he said.

Experts explain that monuments like Jantar Mantar are constantly exposed to rain, dust and temperature changes. Over time, this leads to moisture entering the structure. Iron parts can corrode, and salts carried by water can settle inside the stone, causing cracks and surface damage.

Another concern is that several instruments need re-marking, as their engraved lines — essential for taking precise readings — are slowly fading.

Conservationists say that past repairs, natural ageing and widening of joints have made the situation worse. What is needed now, they stress, is a detailed conservation plan — backed by scientific study and careful restoration.

Conservationists say that past repairs, natural ageing, and widening of joints have made the situation worse. What is needed now, they stress, is a detailed conservation plan — backed by scientific study and careful restoration.Get real-time updates and result insights on the CBSE 12 Result 2026.