Is Tap Water Safe to Drink in San Juan?
Generally yes, tap water in San Juan is safe to drink. As a US territory, Puerto Rico’s water utility PRASA (Puerto Rico Aqueduct and Sewer Authority) must meet EPA Safe Drinking Water Act standards, and San Juan’s metropolitan system is the island’s most reliable.
Water Source
PRASA supplies San Juan from the Sergio Cuevas (Carraizo) and La Plata reservoirs in the central mountain range, treated at the Sergio Cuevas filtration plant and monitored under US federal water quality regulations.
Contaminants & Concerns
No major contamination under normal conditions. PRASA’s San Juan system consistently meets EPA standards for over 90 regulated contaminants. The main risk periods are after hurricanes, when boil-water advisories may be issued. Some older buildings in Old San Juan may have legacy lead service lines.
Tips
- •San Juan’s tap water meets the same EPA standards as any mainland US city — it is safe to drink from the tap
- •In Old San Juan’s historic buildings, run the cold tap for 30 seconds to flush potential lead from ageing pipes
- •Check PRASA advisories during hurricane season (June–November) for any localised boil-water notices
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