Yes, tap water in Portugal is safe to drink. The country maintains a national target of 99% of the population served by water that meets safety standards, and monitoring data from 2021 through 2023 confirms that target has been consistently met. Whether you’re visiting Lisbon, Porto, or the Algarve, you can fill a glass from the tap without worry.
How Portugal Monitors Water Quality
Portugal’s water regulator, ERSAR, tracks a metric called the “Safe water indicator,” which combines two measurements: whether utilities are testing water as frequently as required by law, and whether those samples meet the chemical and microbiological limits set by EU legislation. That combined score has held steady at 99% across recent reporting periods.
In Lisbon, the municipal supplier EPAL monitors chlorine levels around the clock, adjusting disinfection in real time. This is standard practice across Portugal’s larger utilities. The country follows EU drinking water directives, which set some of the strictest limits in the world for contaminants like lead, nitrates, and bacteria.
What Portuguese Tap Water Tastes Like
Taste varies by region, and this is the main reason some visitors reach for bottled water. Lisbon’s tap water has an average hardness of about 80 mg/L of calcium carbonate, which qualifies as moderately soft. For comparison, London’s water typically runs above 200 mg/L. Softer water generally tastes lighter and less mineral-heavy, so most people find Lisbon’s tap water fairly neutral.
The Algarve and parts of southern Portugal tend to have slightly harder water drawn from limestone aquifers, which can give it a more mineral taste. Northern regions like Porto, supplied largely by river water, often taste softer. None of these variations pose a health risk. If you notice a faint chlorine taste, letting the water sit in an open pitcher in the fridge for 30 minutes will allow the chlorine to dissipate. Cooler water also tastes noticeably better, as EPAL itself notes.
Older Buildings and Pipe Concerns
The one situation worth knowing about involves very old plumbing. Portugal has beautiful historic buildings, and some of them still have original pipes from before modern plumbing standards. Homes built before the mid-1980s may contain lead solder, lead pipes, or older brass fittings that can leach small amounts of metals into standing water.
Several factors affect how much metal enters the water: how acidic or alkaline the water is, how long it has been sitting in the pipes, and how worn the pipes are. The practical fix is simple. If you’re staying in a notably old building, let the cold tap run for 15 to 30 seconds before filling a glass, especially first thing in the morning. This flushes out water that has been sitting in contact with the pipes overnight. Always use the cold tap for drinking and cooking, since hot water dissolves metals more readily.
This applies to older buildings anywhere in Europe, not just Portugal. Modern apartments and hotels use updated plumbing materials and pose no additional concern.
Drinking Water While Traveling in Portugal
Restaurants across Portugal serve tap water if you ask for it, though many will offer bottled water by default (it’s a revenue source, not a safety concern). Requesting “água da torneira” gets you tap water. In Lisbon, EPAL maintains a network of public drinking fountains mapped through their free H2O Quality app, which shows your nearest fountain and lets you check local water quality data. Carrying a reusable bottle and refilling it from fountains or taps is both safe and common.
Rural areas and small villages are generally fine as well, since Portugal’s 99% compliance figure covers the national system. The Azores and Madeira also have treated municipal water, though very small, isolated systems on any island are worth asking about locally.
Tap Water vs. Bottled Water
Portugal has a strong bottled water culture, and you’ll see brands like Luso and Água das Pedras everywhere. This is a preference, not a necessity. Bottled water in Portugal is inexpensive, often under a euro for 1.5 liters, but it generates significant plastic waste in a country that’s increasingly focused on sustainability.
From a safety standpoint, Portuguese tap water undergoes continuous monitoring that bottled water does not always match in frequency. The EU requires both to meet safety limits, but municipal water is tested far more often. If you prefer the taste of a particular mineral water, that’s a valid choice. If you’re buying bottles purely out of safety concerns, you can save the money and the plastic.