San Jose
Costa Rica · North America
The water
62 mg/LModerate
Source: Laboratorio Nacional de Aguas via Revista Costarricense de Salud Publica · Published figure. Hardness counts dissolved calcium and magnesium in the water; it is the number your hair meets in the shower.
What moderate water does to hair
The comfortable middle. Most routines work unchanged; a clarifying wash now and then keeps shine.
The washing routine for San Jose
Your usual routine holds here, with one addition: a chelating (detox) wash roughly every eighth wash keeps the gentle build-up from accumulating. Condition as normal after every wash.
Climate, from recent records (Open-Meteo, ERA5 2015-2024): March is the warmest month, averaging 27°C by day, and humidity peaks in October at about 90% on average. 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 A and B. Supply: 120 V, 60 Hz.
A dryer or styler wound for 230 V only will run weak on this supply, and a plug adapter does not change voltage. Check the label for dual voltage (100-240 V) before you travel.
Plug, voltage and frequency: IEC World Plugs and national standards.
Plan San Jose 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.