Can You Drink Tap Water in Cambodia? (2026) Safety Guide

Quick Reference

Key Statistics

Water Infrastructure & Supply

Cambodia's water infrastructure has undergone significant transformation since the devastation of the Khmer Rouge era. The Phnom Penh Water Supply Authority (PPWSA) is often cited as a remarkable success story, having turned a war-ravaged system into an award-winning utility that now provides 24-hour pressurized water to the capital. However, outside of Phnom Penh, water infrastructure remains underdeveloped, with many provincial towns relying on small private operators and rural areas depending on wells, rainwater harvesting, and untreated surface water.

The PPWSA treats water drawn from the Mekong and Tonle Sap rivers using conventional methods including coagulation, sedimentation, filtration, and chlorination. Despite the high quality at the treatment plant, aging pipes and secondary contamination in building plumbing systems mean that water at the tap may not meet drinking standards. In provincial capitals, water treatment capacity is limited and supply is often intermittent, with lower pressure increasing the risk of infiltration of contaminants into the pipe network.

Major investment projects funded by the Asian Development Bank, World Bank, and JICA are expanding piped water networks to secondary cities and improving rural water supply. The Cambodian government's National Strategy for Rural Water Supply, Sanitation, and Hygiene aims to achieve universal access to safe water by 2030. Projects in Siem Reap, Battambang, and Kampong Cham are upgrading treatment plants and extending distribution networks, though progress remains gradual.

Contamination & Health Risks

The primary health risks from Cambodian tap water include bacterial contamination (E. coli, Salmonella, Vibrio cholerae), parasites (Giardia, Cryptosporidium), and in certain regions, elevated levels of arsenic in groundwater. Studies have found that even in Phnom Penh, water samples taken at household taps can show bacterial contamination due to deteriorated pipes and improper storage. Rural wells in the Mekong River floodplain provinces of Kandal, Prey Veng, and Kampong Cham have documented arsenic levels exceeding WHO guidelines.

Pollution from industrial discharge, agricultural pesticides, and untreated sewage further compromises surface and groundwater quality. The garment industry, brick kilns, and unregulated factories contribute heavy metals and chemical pollutants. During the rainy season (May, October), flooding dramatically increases turbidity and microbial contamination in both surface water and shallow wells, making water quality particularly unreliable.

For travelers, the most common waterborne illnesses are traveler's diarrhea, gastroenteritis, and hepatitis A. Ice in tourist-oriented restaurants is generally produced commercially from purified water, but street vendors and local eateries may use ice from untreated sources. Washing fruits and vegetables with untreated tap water can also pose a risk. Travelers should be vigilant about water safety even in upscale establishments outside major tourist hubs.

Regional Water Quality Breakdown

Practical Tips for Travelers

• Always drink bottled or filtered water , look for an intact seal on bottles before purchasing, as refilled bottles are occasionally sold by unscrupulous vendors.
• Carry a portable water purification bottle (such as Grayl or LifeStraw) especially when traveling outside Phnom Penh and Siem Reap, as bottled water may not always be available.
• In Khmer, ask for purified water by saying '' (som tuk bor-ri-sot), meaning 'please give me purified water.' You can also simply say 'tuk sot' (clean water).
• Be cautious with ice at street stalls , commercially produced ice comes in cylindrical tubes with holes and is generally safe, while irregularly shaped crushed ice may be made from untreated water.
• Use bottled or filtered water to brush your teeth, especially outside of Phnom Penh, to avoid accidental ingestion of contaminated water.
• Peel fruits and vegetables rather than just washing them, or soak produce in water purified with a few drops of iodine or food-grade hydrogen peroxide for added safety.
• During the rainy season (May, October), be extra cautious about water quality everywhere , flooding increases contamination significantly, even in areas with treated water supply.
• Many hotels and guesthouses provide free refill stations or complimentary water bottles , take advantage of these to reduce costs and plastic waste.

Bottled Water Availability & Cost

Bottled water is widely available throughout Cambodia and is the primary drinking water source for most travelers. A 500ml bottle typically costs 500, 1,500 KHR (about $0.12, $0.37 USD) at convenience stores and local shops, while restaurants and hotels may charge $0.50, $1.50 USD. Popular local brands include Vital, Aquarius, and Khmer Water, while international brands like Evian are available at higher prices in tourist areas.

Buying large 1.5-liter bottles ($0.30, $0.75 USD) or 20-liter refillable jugs (around $1.00, $1.50 USD) is more economical for longer stays. Many guesthouses and hotels provide complimentary drinking water. Travelers concerned about plastic waste should consider bringing a portable water filter or UV purification bottle , brands like LifeStraw or Grayl work well in Cambodia and can significantly reduce single-use plastic consumption during a trip.

Frequently Asked Questions