Is Guaynabo, Puerto Rico tap water safe?
2 water systems report serving Guaynabo. Your water depends on which one serves your address. Check your bill if unsure.
A
Us Army, Fort Buchanan
Serves 6,411 people · Surface water · Full report →
No health-based violations in the last 5 years; PFAS tested (UCMR 5), none above federal limits; Lead 90th percentile above the new 10 ppb action level (LCRI, effective Nov 1, 2027); Lead 90th percentile below the action level (2026).
B
Lomas Verdes (Watch Tower)
Serves 130 people · Groundwater · Full report →
1 health-based violation in the last 5 years; 1 monitoring/reporting violation; 2 not yet resolved; No UCMR 5 PFAS results on file; Latest lead 90th percentile on file is from 2014 (older than 5 years, not graded).