Which water type is classified as nonpotable?

Brackish water is classified as nonpotable because it contains a higher salinity level than freshwater but lower salinity than seawater. This makes it unsuitable for drinking and often requires further treatment or desalination before it can be considered safe for human consumption.

In contrast, bottled water, reverse osmosis water, and approved municipal water are treated or processed to be safe for drinking. Bottled water typically comes from a clean source and is subjected to safety regulations. Reverse osmosis water undergoes a filtration process that removes impurities and contaminants, making it potable. Approved municipal water has typically passed health and safety regulations and is treated to ensure it is safe for public consumption.