The Mololoa River is a tributary of the

Río Grande de Santiago The Río Grande de Santiago, or Santiago River, is a river in western Mexico. It flows westwards from Lake Chapala via Ocotlán through the states of Jalisco and Nayarit to empty into the Pacific Ocean. It one of the longest rivers in Mexico, ...

. Located in the Mexican state of

Nayarit Nayarit (), officially the Free and Sovereign State of Nayarit ( es, Estado Libre y Soberano de Nayarit), is one of the 31 states that, along with Mexico City, comprise the Federal Entities of Mexico. It is divided in 20 municipalities and its ...

, it runs through the state capital of

Tepic Tepic () is the capital and largest city of the western Mexico, Mexican Political divisions of Mexico, state of Nayarit, as well as the seat of the Tepic Municipality. Located in the central part of the state, it stands at an altitude of above ...

Condition

It is very

polluted Pollution is the introduction of contaminants into the natural environment that cause adverse change. Pollution can take the form of any substance (solid, liquid, or gas) or energy (such as radioactivity, heat, sound, or light). Pollutants, the ...

, but in the past was a recreational area for all the

citizens and marked the end of the city. At the moment the local and federal authorities are trying to clean up the river, but all the attempts have so far been in vain. {{Coord missing, Mexico Rivers of Nayarit Río Grande de Santiago