Costa Rica’s drinking water is treated and generally safe to drink in the Central Valley and many towns, so most visitors don’t need bottled water everywhere. Quality varies by water system, though. Take more care in Guanacaste beach towns, where dry-season shortages can affect supply, and on the Caribbean coast. Be careful too at remote lodges or rentals that run on private wells, springs or tanks. Never drink from rivers, streams or waterfalls. When in doubt, ask your host, and carry a filter bottle so you can skip most of the plastic.
This guide is for travelers who want a straight answer on drinking water in Costa Rica without overdoing the bottled water. It covers where tap water is generally fine, where to be careful, ice and food, and the easiest alternatives.
| Where you are | What to do |
|---|---|
| Central Valley cities and towns | Tap water is generally fine; some visitors filter it for taste |
| Established hotels and restaurants | Tap water and ice are usually fine; ask if unsure |
| Guanacaste beach towns | Filter or use bottled, especially in the dry season |
| Caribbean coast | Filter or use bottled if you have a sensitive stomach |
| Remote lodges and rentals | Ask about the water source; filter or use bottled if unsure |
| Rivers, streams, waterfalls | Never drink untreated |
| Local “don’t drink” notice | Follow it; use bottled until it’s lifted |
The answer
Is the Tap Water Safe to Drink in Costa Rica?
In most of the country, yes. Costa Rica has some of the best drinking water in Central America. Most people get treated water from the national utility (AyA, the Costa Rican Institute of Aqueducts and Sewers), from municipal systems, or from ASADAS, community water associations that run many rural systems. National rules set drinking-water standards for all of them.
The catch is that Costa Rica has hundreds of separate water systems, and they don’t all perform equally. Regulators regularly find problems in some systems, more often in small rural ones and in Guanacaste. Occasionally, authorities order residents of an area not to drink tap water for a short time, as happened in several San José-area cantons in early 2024 after hydrocarbon contamination of the supply. Those notices are local and temporary, but follow them if you’re in an affected area.
Generally fine
Where Tap Water Is Generally Fine
- The Central Valley: San José, Heredia, Alajuela, Cartago and surrounding towns are on large treated systems. The water is chlorinated, and some visitors filter it for taste.
- Many inland tourist towns: La Fortuna and Monteverde, for example, are commonly considered safe.
- Many Pacific towns: Jacó, Manuel Antonio, Dominical and Uvita generally have reliable supplies.
- Established hotels and restaurants: most are on municipal or well-maintained systems; if in doubt, ask.
Even where the water is safe, a change in water can upset a sensitive stomach for the first day or two. If that’s you, filter for the first few days.
Take care
Where to Be Careful With Tap Water
- Guanacaste beach towns: towns such as Tamarindo, Flamingo, Potrero and Playas del Coco can run short of water in the dry season, roughly December to April, and some water may be trucked in. Many travelers filter or use bottled water along most of this coast. See our Tamarindo guide.
- The Caribbean coast: in towns such as Puerto Viejo, well water can be high in minerals and silt. It isn’t necessarily harmful, but it can upset visitors’ stomachs. See our Puerto Viejo guide.
- Southern Nicoya beach towns: in places such as Montezuma and Santa Teresa, many travelers stick to bottled or filtered water; ask your host.
- Remote lodges and rentals: properties on private wells, springs or tanks may not be tested regularly. Ask how the water is treated. See our guide to Airbnb vs. hotels.
- After heavy rain or flooding: water can turn cloudy or be cut off. Use bottled water until it clears. See our guide to the rainy season.
Hidden sources
Ice, Brushing Your Teeth and Fruit Drinks
- Ice: most restaurants and bars use ice made from purified or treated water. In very small eateries in areas where you’re avoiding tap water, skip the ice.
- Brushing your teeth: where tap water is fine to drink, it’s fine for brushing. Where it isn’t, use bottled or filtered water.
- Fruit drinks: refrescos naturales and batidos, the fresh juices and smoothies served at sodas (small local restaurants), are often made with water or ice. They’re as safe as the local water; ask for one made with milk (en leche) if you’re unsure.
- Raw produce: salads and cut fruit are washed in local water. Where you’re avoiding tap water, choose fruit you peel yourself.
See our guide to sodas and pulperías.
Alternatives
Bottled Water, Filters and Refills
- Bottled water: sold in every supermarket and corner store (pulpería). For longer stays, large refillable jugs are much cheaper per liter; stores usually charge a deposit on the jug.
- Filter bottles: a bottle with a built-in filter is the easiest way to drink tap water in uncertain areas and cut plastic. Choose one rated for bacteria and protozoa.
- Refill stations: many hotels, lodges, tour operators and restaurants offer filtered water refills; ask before buying bottles.
- Boiling: bring water to a rolling boil for one minute, then let it cool.
- Purification tablets: useful for remote hiking or emergencies; follow the package directions.
Our Costa Rica packing list covers what else to bring.
On the spot
How to Decide on the Spot
- Ask your host or front desk: “Is the tap water safe to drink here?” A clear yes from staff is usually reliable; hesitation means filter or buy bottled.
- Ask where the water comes from: a municipal or AyA system is a good sign; a private well, spring or tank calls for more caution.
- Look and smell: cloudy, discolored or odd-smelling water isn’t for drinking, wherever you are.
- Watch for local notices, especially after storms, and follow any “don’t drink” order.
If you get sick
If You Get an Upset Stomach
Traveler’s stomach problems often come from food as much as water, and most pass in a day or two. Rest, drink plenty of safe fluids, and use oral rehydration salts from a pharmacy. See a doctor for a high fever, blood in your stool or signs of dehydration. Our guides to avoiding getting sick in Costa Rica and how pharmacies work cover more.
FAQ
Costa Rica Drinking Water: FAQ
Can you drink the tap water in Costa Rica?
In most cities and many towns, yes. Take more care in Guanacaste beach towns, on the Caribbean coast and at remote properties with private water sources, and never drink untreated river or stream water.
Is the tap water safe in San José?
Generally, yes. San José is on large treated systems, though the water is chlorinated and some visitors filter it for taste. Follow any temporary “don’t drink” notice.
Is the water safe in Tamarindo and Guanacaste?
Supply can be unreliable in the dry season, and many travelers filter or use bottled water along most of the Guanacaste coast. Ask your host.
Is the ice safe in Costa Rica?
In most restaurants and bars, yes; ice is usually made from purified or treated water. In very small places in areas where you’re avoiding tap water, skip it.
Can I brush my teeth with tap water in Costa Rica?
Yes, wherever the tap water is safe to drink. Where it isn’t, use bottled or filtered water.
Should I bring a water filter bottle to Costa Rica?
It’s a good idea. A filter bottle lets you drink tap water in uncertain areas and cuts down on plastic bottles.
The short version
Tap water is generally safe in the Central Valley and many towns.
Filter or use bottled in Guanacaste beach towns, on the Caribbean coast and at remote properties.
Never drink from rivers or streams, and follow local “don’t drink” notices.