Tap water in the Dominican Republic is not safe to drink. The U.S. State Department advises travelers to stick with bottled water, and most hotels and resorts operate under the same assumption, providing guests with complimentary bottled water daily. The risks come from aging infrastructure, limited wastewater treatment, and bacterial contamination that your gut isn’t accustomed to.
Why the Tap Water Is Unsafe
The core problem is sanitation infrastructure. Roughly 59% of wastewater collected by sewerage networks across the country is discharged untreated into the ground, rivers, or the sea. In the Santo Domingo metro area, only about 18% of streets are connected to sewerage networks. Everyone else relies on septic tanks, latrines, or direct discharge into the environment. That untreated waste contaminates the same watersheds and underground aquifers that supply drinking water.
Even where water leaves a treatment plant in acceptable condition, old and leaking pipes can introduce contaminants before it reaches your faucet. The combination of limited treatment capacity and deteriorating distribution systems means tap water quality varies wildly from one neighborhood to the next, and none of it meets the standard your stomach is prepared for.
What You Can Actually Get Sick From
The most common risk for visitors is travelers’ diarrhea, caused by bacteria your digestive system has never encountered. Symptoms typically start within a day or two of exposure and range from mild discomfort to several days of misery that can derail a vacation.
Cholera is a more serious concern. The Dominican Republic experienced an outbreak beginning in 2022, with over 1,400 suspected cases reported in 2023 alone, mostly in communities near the Haitian border with poor water access. Cholera spreads through contaminated water and causes severe dehydration rapidly.
Leptospirosis, a bacterial infection spread through water contaminated with animal urine, is also prevalent. In 2022, the country reported 263 cases and 30 deaths. This is primarily a risk in freshwater lakes, rivers, and flooded areas rather than from tap water, but it’s another reason to be cautious around untreated water sources. The CDC specifically advises travelers to avoid recreational swimming in lakes and rivers.
Water Safety at Resorts and Tourist Areas
Major resorts in Punta Cana, Puerto Plata, and other tourist zones operate their own reverse-osmosis filtration systems. These plants strip out bacteria, parasites, and dissolved contaminants, producing water that’s safe for cooking, making ice, and preparing drinks at hotel bars and restaurants. You’ll typically find bottled water restocked in your room each day as well.
That said, most resorts still clearly advise against using bathroom tap water for drinking or brushing teeth. The filtered water feeds the kitchen and bar areas, but the plumbing in your room may draw from a different supply. Treat bathroom taps as off-limits for anything that goes in your mouth.
Is the Ice Safe?
In resorts, hotel restaurants, and tourist-facing establishments, yes. Ice at these locations is commercially manufactured from purified, filtered water, produced in industrial facilities, and delivered in sealed bags. Tour operators running day trips to popular spots like Saona Island or Samaná typically prepare drinks with purified ice and bottled water as well.
The CDC draws a distinction worth noting: ice in well-established tourist locations is usually safe, but ice in remote or non-tourist areas may not be. If you’re eating at a small roadside restaurant outside a tourist zone, requesting drinks without ice is a reasonable precaution.
Brushing Your Teeth With Tap Water
This is the question that keeps travelers up at night, often after they’ve already done it. The practical risk is low. Brushing your teeth involves a small amount of water, most of which you spit out. Many repeat visitors to the Dominican Republic report brushing with tap water for years without problems. Others have gotten sick from it. The difference likely comes down to local water quality at that specific hotel, individual gut sensitivity, and luck.
The safest approach is to use bottled water for brushing, which is easy enough when there’s a bottle on your bathroom counter. But if you accidentally use the tap, you probably ingested 20 to 30 milliliters at most. That’s a very different exposure than drinking a full glass.
What to Do If You Get Sick
Travelers’ diarrhea hits fast and is usually self-limiting, resolving within a few days. The biggest immediate danger is dehydration, especially in Caribbean heat. Oral rehydration salts are widely available at pharmacies throughout the Dominican Republic and are the best first response. These replace not just water but the electrolytes and sugars your body is losing.
Over-the-counter anti-diarrheal medications like loperamide can reduce the frequency of bathroom trips and are helpful if you need to get on a bus or a plane. However, if you develop a fever, see blood in your stool, or find that symptoms are severe enough to prevent you from functioning, those are signs of something more aggressive than a standard case. Persistent diarrhea lasting more than a week could indicate a parasitic infection, which won’t resolve on its own and needs targeted treatment.
Practical Tips for Your Trip
- Bottled water everywhere. Buy it at the airport, keep it in your bag, and request it at restaurants. Check that the seal is intact before drinking.
- Skip ice outside tourist zones. In resorts and established restaurants, ice is fine. At a local bar or street vendor, skip it.
- Watch for hidden water exposure. Raw salads washed in tap water, fresh fruit rinsed under the faucet, and fountain drinks mixed with local water can all be sources of contamination. Stick to cooked food and peelable fruits when eating outside resorts.
- Avoid freshwater swimming. Lakes, rivers, and flooded areas carry leptospirosis risk, particularly after heavy rain. Ocean swimming and pool swimming are fine.
- Pack oral rehydration packets. They’re available locally, but having a few in your luggage means you’re prepared from the moment symptoms start.