Twelve packaged drinking water plants have been sealed on Wednesday for not holding ISI certification.

The crackdown was launched by a team of Food Safety Officers following a directive from Food Safety Commissioner and Collector M. Ravikumar.

M. Jagadis Chandrabose, who led the drive, said action had been taken against the defaulters, who failed to comply with mandatory requirement of the ISI certification, after serving closure notices five days ago.

Despite providing ample time to obtain the mandatory certification, the proprietors of the plants ignored it, he said.

Seven of the twelve plants sealed in the crackdown were in Kovilpatti. Besides, two plants in Sathankulam, one in Tiruchendur, Tuticorin and at Vasavappapuram in Karungulam block were also sealed.

Of the 43 packaged drinking water plants in Tuticorin, only 26 had been ISI-certified, Dr. Chandrabose also said.

Hailing the drive, A. Sankar, president, District Consumer Rights and Protection Association, said the officials should conduct raids in these plants at frequent intervals and check the quality of water, the much sought after consumer product, nowadays.

Identities of the sealed plants should be revealed and the officials need to go a step further to impose ban on selling the sealed product in stores.

He also sought the intervention of the enforcement agencies to curb the overpricing of bottled water on sale at the shops since the problem continued unabated.