Chiang Mai
Thailand · Asia
The water
122 mg/LHard
Source: Chiang Mai University Faculty of Veterinary Medicine tap water study · Published figure. Hardness counts dissolved calcium and magnesium in the water; it is the number your hair meets in the shower.
What hard water does to hair
Calcium and magnesium deposit steadily at this level, roughening the cuticle so hair looks duller, tangles more and loses colour faster. A regular chelating (detox) wash is what keeps it in check.
The washing routine for Chiang Mai
Build a chelating (detox) wash into the rhythm, about every fourth wash, with a gentle everyday shampoo between detox days. Condition well after each wash; minerals roughen the cuticle, and colour-treated hair fades faster here.
Climate, from recent records (Open-Meteo, ERA5 2015-2024): April is the warmest month, averaging 35°C by day, and humidity peaks in August at about 87% on average. Day to night swings reach 13°C, which dries hair out between washes; the plan adds moisture and a sealing leave-in when a stop spans those months. In the hot months, sun and sweat do as much damage as the water: shade, a hat and a rinse after swimming carry the routine. In the humid months, frizz is the main event; anti-humidity styling matters more than wash frequency.
Local note: source minerals concentrate in dry season; Ping River alkalinity lower in rainy season.
Plugs and power for your tools
Sockets: Type A, B, C and O. Supply: 220 V, 50 Hz.
A 120 V only dryer or styler (North American) will burn out on this supply, and a plug adapter does not change voltage. Check the label for dual voltage (100-240 V) before you plug in.
Plug, voltage and frequency: IEC World Plugs and national standards.
Plan Chiang Mai properly
The trip planner turns this water profile into a wash plan for your hair type, a chosen kit and a packing list, month by month.