Cascais
Yes. Tap water in Cascais is low risk. Safe to drink from the tap.
Is it safe?
100%
Águas de Cascais
Low risk
Safe to drink from the tap
Safe-water score 100% in 2025. It was 100% in 2024.
Supplied by Águas de Cascais.
About 214,124 people. 4,991 tests.
Hardness: Soft (11.9 °f).
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 Cascais, Grande Lisboa?
Yes. Tap water in Cascais 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.