One of the alternatives to offer and obtain drinking water outside the big bottling brands are water purifiers. Like bottling companies, water purifiers must comply with standards and regulations to ensure that the water offered meets the appropriate characteristics for human use and consumption. In the case of Mexico, the Mexican Official Standards (NOM) are those that establish the regulations necessary to market or provide water quality. These regulations establish the limits of contaminants allowed in water intended for human consumption, which guarantees that purified water is safe and complies with the appropriate physical, chemical and microbiological parameters. The NOMs that must be considered for drinking water are:
- NOM-127-SSA1-2021, "Water for human use and consumption. Permissible limits of water quality".
- NOM-201-SSA1-2015, "Products and services. Water and ice for human consumption, packaged and in bulk. Sanitary specifications."