Can You Drink Tap Water in Siem Reap?

Tap water in Siem Reap is not safe to drink and this applies throughout the entire city — the Pub Street and Old Market (Psar Chas) entertainment and dining district, the boutique hotel corridors along National Road 6, the Angkor Wat temple access roads, the Siem Reap River waterfront, and the surrounding residential areas. Water supply in Siem Reap is managed by the Siem Reap Water Supply Authority, which draws from the Siem Reap River and groundwater sources in the Angkor basin. Treatment is applied before distribution but the infrastructure — which has developed rapidly to serve a city that has grown dramatically on the back of Angkor Wat’s status as one of Southeast Asia’s most visited archaeological sites — does not produce water of international drinking quality at the point of tap delivery.

Cambodia’s water infrastructure challenges reflect the country’s extraordinary development trajectory. Siem Reap was a small provincial town of modest infrastructure before Angkor Wat’s tourism profile grew exponentially from the late 1990s onward following the end of the Khmer Rouge period. The rapid expansion of hotel, guesthouse, and restaurant capacity to serve millions of annual visitors has run ahead of municipal water infrastructure investment in many respects. The pipe network in older parts of Siem Reap, including areas around the Old Market and along the Siem Reap River, includes aging sections that introduce contamination between treatment and tap. Seasonal variation also affects water quality: during the monsoon season (May–October), when Cambodia receives the vast majority of its annual rainfall, increased runoff and flooding can compromise source water quality and overwhelm treatment capacity.

No hotel, guesthouse, or restaurant of any category in Siem Reap presents tap water as a drinking option. The full range of Siem Reap’s accommodation — from budget guesthouses on the backpacker streets near Pub Street to luxury boutique hotels surrounding the Angkor complex — all provide sealed bottled water for guests and use purified water for all food preparation and ice. The Cambodian hospitality sector serving the Angkor tourism circuit is experienced in catering to international visitors and the universal standard of bottled drinking water is well understood and consistently maintained.

For visitors at Angkor Wat, Angkor Thom, Ta Prohm, Bayon, and the dozens of other temples within the Angkor Archaeological Park — a UNESCO World Heritage Site covering over 400 square kilometres of jungle and temple complexes — carrying sufficient sealed bottled water is an absolute necessity. Temple visits involve extensive outdoor walking in tropical heat, often for multiple hours. The Cambodian dry season (November–April) that coincides with peak tourist season produces temperatures regularly exceeding 35°C, and dehydration risk at the temples is a genuine health concern. Bottled water vendors are stationed at the main temples but supply can be unreliable at more remote sites. Carrying your own sufficient supply from Siem Reap is always the safest approach.

For day trips from Siem Reap to the floating villages of Tonlé Sap Lake — Southeast Asia’s largest freshwater lake and the ecological heart of Cambodia — or to Beng Mealea and Koh Ker temples further from the main Angkor complex, the same water safety approach applies throughout Cambodia. Sealed bottled water must be carried for any remote temple excursion where vendor supply cannot be guaranteed.