Viana do Castelo
Yes. Tap water in Viana do Castelo is low risk. Safe to drink from the tap.
Is it safe?
99%
Águas do Alto Minho
Low risk
Safe to drink from the tap
Safe-water score 99.48% in 2025. It was 98.98% in 2024.
Supplied by Águas do Alto Minho.
About 95,426 people. 3,434 tests.
Source
ERSAR, Portugal’s water regulator (RASARP 2026).
Period covered: 2025.
Covers all 278 municipalities in mainland Portugal. The safe-water score is the share of required tests that were done and met the legal limits in 2025. 99% or above is rated low risk. Hardness is the typical level measured by the main supplier.
Common questions
Can I drink the tap water in Viana do Castelo, Norte?
Yes. Tap water in Viana do Castelo is low risk. Safe to drink from the tap.
Where do these ratings come from?
ERSAR, Portugal’s water regulator (RASARP 2026). Period covered: 2025.