Kolkata
India · Asia
The water
143 mg/LHard
Source: Government of West Bengal Directorate of Public Health Engineering · 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
Minerals start to coat the strand: dullness, tangling, colour fade. Chelating (detox) washes enter the routine.
The washing routine for Kolkata
Build the routine around a detox (chelating) wash about every fourth wash, with gentle washing between detox days. Follow every wash with conditioner; at this level the cuticle roughens quickly and colour-treated hair fades sooner.
Climate, from recent records (Open-Meteo, ERA5 2015-2024): April is the warmest month, averaging 36°C by day, and humidity peaks in August at about 87% on average. Day to night swings reach 12°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.
Plugs and power for your tools
Sockets: Type C, D and M. Supply: 230 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 Kolkata 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.