Drinking water with a TDS level of 700-800 ppm is considered unsafe for regular consumption. High TDS can indicate the presence of harmful contaminants like heavy metals and salts, which may lead to health issues such as kidney damage, hypertension, and digestive problems. It’s crucial to ensure your drinking water has a TDS level below 300 ppm for optimal health and safety. Installing a commercial RO system can help reduce TDS levels and provide clean, safe water.