Is Tap Water Safe to Drink in Puerto Rico?

The Puerto Rico Aqueduct and Sewer Authority (PRASA) supplies over 97% of residents from a mix of surface reservoirs (such as Carraizo and La Plata) and groundwater wells, treated at facilities regulated under the same federal framework used on the US mainland.

Because PRASA falls under US EPA jurisdiction, treatment and testing standards are stricter than in most Caribbean nations. That said, PRASA has faced enforcement actions over aging infrastructure and lead service lines in older buildings, and boil-water notices are common after hurricanes like Maria (2017) and Fiona (2022).

San Juan, Ponce, and other major cities generally have reliable, EPA-compliant water. In rural mountain interior towns and areas still recovering from storm damage, service interruptions and localized boil-water advisories are more frequent, so check current PRASA notices if traveling there.

Water hardness varies by source but is generally moderate, roughly 50–150 mg/L, similar to much of the US mainland..

Yes, most Puerto Ricans drink tap water, though many also use home filters or bottled water as a personal preference rather than a safety necessity.

• •Puerto Rico is one of the few Caribbean destinations where tap water meets US federal drinking water standards
• •Check PRASA advisories during and after hurricane season (June–November) before drinking tap water
• •Older buildings in San Juan may have aging plumbing — running the tap briefly before drinking is a reasonable precaution

• •Follow local boil-water advisories after hurricanes or major storms
• •Consider a filter if staying in an older building with dated plumbing