How to know your water is hard
White chalky rings on taps, soap that will not lather, spotting on glass shower panels and a geyser that heats slower than it used to are all classic indicators of high mineral content.
The appliances that suffer first
Geysers and washing machines take the earliest hit because scale coats the heating element. A scaled element can consume noticeably more power for the same result before it eventually burns out.
What you can do about it
Descale bathrooms professionally every quarter, flush the geyser tank annually, and consider a whole-house softener if TDS readings are consistently high. Regular RO servicing also protects your drinking water quality.