Is Tap Water Safe to Drink in Chennai?
No, tap water in Chennai is not safe to drink. Chennai Metro Water Supply and Sewerage Board (CMWSSB) struggles with chronic water scarcity and inconsistent treatment, making bottled or purified water essential.
Water Source
Chennai draws from the Chembarambakkam, Poondi, Cholavaram, and Red Hills reservoirs, supplemented by the Krishna River water diverted from Andhra Pradesh via the Telugu Ganga canal. Desalination plants at Minjur and Nemmeli supplement the supply during droughts.
Contaminants & Concerns
Bacterial contamination is common due to leaking pipes and cross-contamination with sewage lines. Industrial zones in north Chennai contribute heavy metals to groundwater. The city’s severe water scarcity means supply is intermittent, and low pressure in pipes increases contamination risk.
Tips
- •Always use sealed bottled water or an RO purifier — never drink tap water directly
- •Carry your own water when visiting temples and tourist sites, as public taps are not safe
- •During the monsoon season, be especially cautious as flooding can further contaminate the supply
Frequently Asked Questions
Sources & References
The safety rating and guidance on this page draw on the following sources. See our full methodology.
- •WHO Guidelines for Drinking-water Quality
- •CDC Travelers' Health destination pages
- •The municipal water utility's published quality data