Water supply and sanitation in Mexico is characterized by achievements and challenges. Among the achievements is a significant increase in access to piped water supply in urban areas (88% to 93%) as well as in rural areas (50% to 74%) between 1990 and 2010. Additionally, a strong nationwide increase in access to improved sanitation (64% to 85%) was observed in the same period. Other achievements include the existence of a functioning national system to finance water and sanitation infrastructure with a National Water Commission as its apex institution; and the existence of a few well-performing utilities such as Aguas y Drenaje de Monterrey.