Water Safety in Cambodia

Water safety is one of the most important health considerations for travellers to Cambodia. The universal rule is simple: do not drink tap water. This applies throughout the entire country — in Phnom Penh, Siem Reap, resort areas, and rural villages alike. While water infrastructure has improved in recent years, contamination from bacteria, viruses, heavy metals, and agricultural run-off means tap water remains unsafe for direct consumption.

The good news is that safe drinking water is accessible and cheap everywhere in Cambodia. 1.5-litre bottles cost $0.25–0.50 at any minimarket, 7-Eleven, or roadside stall. Most guesthouses provide filtered water in jugs or water dispensers. The bigger risk for travellers is not finding water, but not knowing which ice or food situations carry risk. This guide covers every scenario.

Safe drinking water is available in several forms throughout Cambodia:

• Bottled water: The most convenient option. Brands like Dasani, Aqua, Evian, and local Cambodian brands are sold at minimarkets, 7-Eleven, Lucky Supermarket, and roadside stalls. A 1.5-litre bottle costs $0.25–0.50. Always check the seal is intact before drinking.
• Water refill stations: Self-service filtered water stations are increasingly common in Siem Reap and Phnom Penh. You bring your own bottle and fill it for $0.10–0.20 per litre. Great for eco-conscious travellers wanting to reduce plastic waste. Look for them near markets, guesthouses, and convenience stores.
• Guesthouse/hotel water: Most guesthouses provide filtered water in glass jugs or large communal dispensers. This is typically safe, but the quality depends on when the filter was last replaced. At reputable guesthouses, this water is fine for drinking and brushing teeth.
• Restaurant water: Reputable restaurants serve filtered or bottled water. Budget local restaurants may serve tap water — always confirm "clean water" when ordering. At mid-range and upscale restaurants, you will normally be given a sealed bottle.

Ice is one of the most misunderstood water safety topics in Cambodia. The blanket advice to "avoid ice" is outdated — the reality is more nuanced:

• Factory ice (cylindrical, with a central hole): This is commercially produced ice made from purified water at regulated facilities. It is delivered in clear plastic bags and used at most restaurants, cafes, and bars across Cambodia. This ice is safe. The distinctive cylindrical shape with a hole through the centre is your visual cue.
• Large block ice (translucent solid blocks): Also generally commercially produced and safe. Used at seafood restaurants and markets to keep food cold.
• Crushed or chipped ice from bags: May be made from tap water, especially at cheap street stalls, market vendors, and rural locations. The risk is higher. At tourist restaurants, even crushed ice is usually factory-made. At a remote roadside stall, be more cautious.

Practical guidance: At any sit-down restaurant or cafe in a tourist area, ice in your drink is almost certainly fine. If you are at a remote rural stall and cannot identify the ice source, ask for a drink without ice — "dak kork ot choul" (no ice please).

Brushing teeth: Most experienced travellers use tap water for brushing their teeth in Cambodia without problems. The amount of water ingested during brushing is tiny, and the acidity of toothpaste provides some protection. However, if you are prone to stomach issues, just arrived, or are in a rural area, using bottled water is the safest approach. Many guesthouses leave a small bottle on the bathroom sink for this purpose.

Raw salads and vegetables: A known risk in Cambodia. Many budget restaurants wash salad ingredients in tap water. Unless you are confident in the restaurant's hygiene standards, order cooked vegetables. This is particularly important at the start of your trip when your stomach has not adapted. Mid-range and upscale restaurants typically wash produce in filtered water and are lower risk.

Peeled fruit: Safe. Fruit you peel yourself (bananas, mangosteens, dragonfruit, rambutan) carries no water risk. Fruit that is pre-cut and displayed at stalls may have been rinsed in tap water — the risk is generally low but exists.

Street food has varying water safety implications depending on the food type:

• Soups and broths (hot): Safe. The cooking process kills pathogens. Noodle soups, rice porridge (bobor), and hot stews are good options.
• Grilled and fried street food: Safe. High heat cooking eliminates risk. Grilled meats, fried rice, lok lak — all fine from street stalls.
• Fresh juices: Variable. Fruit juice pressed to order (sugar cane, coconut, watermelon) may include ice. At reputable juice stalls, ice is factory-produced. At very budget roadside stalls, the risk is higher. If in doubt, ask for no ice.
• Fruit shakes and smoothies: Popular at tourist restaurants. At mid-range establishments, generally safe. At very cheap stalls using homemade ice, apply the ice safety principles above.
• Coffee and tea: Made with boiled water — safe.
• Coconut water: Safe and excellent for hydration. Drink directly from the coconut with a straw before the vendor adds ice.

Cambodia's tropical climate — hot and humid year-round, with temperatures often above 35°C from March to May — means dehydration is a genuine risk, especially for visitors not accustomed to the heat. Active sightseeing at Angkor can involve hours of walking in direct sun.

• Drink 3–4 litres of water per day when sightseeing in the heat — more than you think you need. Thirst is not an early indicator of dehydration in high temperatures.
• Electrolyte sachets: Carried in pharmacies throughout Cambodia for $0.50–1 each. Add to a litre of water during or after heavy activity. Particularly useful if you are sweating heavily at Angkor, Cardamom Mountains, or on the beach.
• Coconut water: Sold by street vendors everywhere for $0.50–1 per coconut. Naturally isotonic and delicious. One of Cambodia's best hydration resources.
• Sugar cane juice: $0.50 fresh-pressed from street carts. Hydrating and full of natural sugar for energy during long temple days.
• Signs of dehydration to watch for: Dark urine, headache, dizziness, fatigue disproportionate to activity. If experiencing these, rest in shade and drink water with electrolytes immediately. Severe dehydration requires medical attention.

Cambodia offers diverse swimming environments, each with different safety considerations:

Ocean Swimming (Sihanoukville, Koh Rong, Koh Rong Sanloem, Kep):

• Generally safe for swimming at beach locations
• Jellyfish (May–August): Jellyfish are more prevalent during the wet season. Box jellyfish are occasionally present — stings are painful but rarely dangerous. Ask locals or beach vendors about current jellyfish presence before swimming.
• Rip currents: Can occur at exposed beaches. Otres Beach and Koh Rong's Long Beach are generally calmer. If caught in a rip, swim parallel to shore, not against the current.
• After heavy rain: Avoid swimming for 24–48 hours after significant rain near populated beaches, as run-off can temporarily raise bacterial levels.

Rivers and Lakes:

• Mekong River: Not recommended for swimming. Strong currents, heavy boat traffic, and potential schistosomiasis risk (freshwater parasite prevalent in slow-moving rivers). Observe from the riverbank.
• Tonle Sap Lake: Do not swim. Schistosomiasis risk, boat traffic, and poor water quality from surrounding communities.
• Kampot River: Certain clean stretches away from the town are swimmable. Ask local guesthouses for current conditions.
• Tatai River (Cardamom Mountains): Clean, clear swimming — one of Cambodia's best freshwater swimming spots during the dry season.

Waterfalls:

• Dry season (November–April): Waterfall swimming is generally safe and the water is clear. Kulen Mountain, Kbal Spean (shallow only — no swimming at archaeological site), and Kirirom waterfalls are popular.
• Wet season (May–October): Waterfalls are powerful and water is often murky with run-off. The current can be dangerous. Wait until water clears after rain before entering.

Hotel and Resort Pools:

• Reputable hotels maintain their pools to international standards and are safe to swim in.
• Be more cautious at very budget guesthouses where pool maintenance may be inconsistent.

If you have consumed contaminated water, symptoms typically appear within 6–72 hours. Seek medical attention if you experience:

• Persistent diarrhoea (more than 3 loose stools in 24 hours)
• Blood in stool — seek medical attention promptly
• High fever (above 38.5°C) alongside gastrointestinal symptoms
• Severe vomiting preventing oral rehydration
• Diarrhoea lasting more than 72 hours
• Signs of severe dehydration (confusion, rapid heartbeat, minimal urination)

Mild traveller's diarrhoea often resolves in 1–2 days with rest and oral rehydration. Pharmacies throughout Cambodia stock rehydration salts (ORS), probiotics, and anti-diarrhoeal medications. International standard clinics are available in Phnom Penh and Siem Reap.

Safe bottled water is available at virtually every inhabited location in Cambodia:

• 7-Eleven: Multiple locations in Phnom Penh and Siem Reap. Open 24 hours. Cold water available. Stock up before early morning temple visits.
• Lucky Supermarket: Best selection, cheapest multi-pack prices. Found in Phnom Penh and Siem Reap. Buy large 6-packs for budget savings.
• Minimarkets and convenience stores: Found on virtually every street in tourist areas and towns. A 1.5-litre bottle typically $0.25–0.50.
• Roadside stalls and petrol stations: Available even on remote highways. Essential for long bus or motorbike journeys.
• Angkor complex: Water vendors inside the temple complex sell bottles at $0.50–1. Bring your own from town to save money and reduce plastic inside the temples.
• Guesthouses and hotels: Most provide complimentary water bottles in rooms or filtered water dispensers. Check before purchasing — you may already have free water.