Replying to a written question in the Rajya Sabha on whether construction of dams by China on the tributaries of the Brahmaputra has contaminated its waters, the minister said the government has noted the Chinese foreign ministry's statement denying such a link and that it was caused by an earthquake in the region and was not a manmade incident.
She also said India intends to "remain engaged with China on the issue of trans-border rivers to safeguard our interest, including through an institutionalised expert-level mechanism which was established in 2006".
The minister said she also took up the issue with the Chinese foreign minister during his recent visit here in December.
The Centre was in close cooperation with various state governments, which use the waters of the Brahmaputra river, Swaraj added.