What Hard Water Is Actually Doing to Your Skin
Hard water carries high concentrations of dissolved calcium and magnesium. In Indian cities like Delhi, Bengaluru, and Jaipur, municipal water hardness regularly exceeds 300 mg/L, well above the Bureau of Indian Standards' acceptable limit of 200 mg/L for drinking water. On skin, these minerals don't rinse away cleanly. They bind with the fatty acids in soap and form a residue called lime soap, which sits on the skin surface, clogs pores, and strips the acid mantle, the thin, slightly acidic film that keeps skin protected and hydrated.
