Lago Agrio is a city located in the province of Sucumbíos in Ecuador. It is situated in the northeastern part of the country, near the border with Colombia. Lago Agrio is a highly industrialized city, primarily known for its significant oil extraction activities. The city was originally named Nueva Loja but was renamed Lago Agrio, meaning "sour lake," in reference to the environmental damage caused by oil exploitation in the region. Despite the environmental challenges, Lago Agrio is an important hub for the oil industry in Ecuador. The city has a population of around 40,000 people and offers basic amenities and services to its residents.