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Portugal

It depends on the town. 199 of 278 listed water systems in Portugal are low risk (71.6%).

AlentejoCentroNorteOeste e Vale do TejoAlgarvePenínsula de SetúbalGrande Lisboa
Open an area for its towns. Green means every listed water system there is low risk. Orange or red means every listed system is high or critical risk. Any other area has mixed ratings. The map shows mainland Portugal, which is what these pages cover.
Alentejo47 water systems · 32 low riskAlgarve16 water systems · 12 low riskCentro77 water systems · 48 low riskGrande Lisboa9 water systems · 9 low riskNorte86 water systems · 59 low riskOeste e Vale do Tejo34 water systems · 31 low riskPenínsula de Setúbal9 water systems · 8 low risk

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 Portugal?

It depends on the town. 199 of 278 listed water systems in Portugal are low risk (71.6%).

Where do these ratings come from?

ERSAR, Portugal’s water regulator (RASARP 2026). Period covered: 2025.