What is a safe calcium level in drinking water?

According to the World Health Organization (WHO), the recommended guideline value for calcium in drinking water is 75 mg/L (milligrams per liter). This level is considered safe for human consumption and does not pose any significant health risks. However, it's important to note that individual calcium requirements can vary depending on factors such as age, diet, and overall health conditions. It's always recommended to consult with healthcare professionals or local health authorities for specific guidance and recommendations regarding calcium intake and drinking water quality.