The Reconquista River, located in Buenos Aires province, Argentina, has long been recognized as one of the country’s most polluted waterways. Flowing approximately 51 miles through the northeastern part of the province, it passes by the community of Costa Esperanza, founded in 1998 in the San Martin district. Despite its picturesque name—borrowed from a popular Argentine youth television show, Verano del 98—the reality of Costa Esperanza’s environment is far from idyllic.

For more than two decades, local residents have grappled with significant contamination and environmental degradation along the river and its tributaries. María Monges, a longtime community leader and activist, recalls the early days of the cleanup effort, describing the area as overwhelmed by blocked streams, litter, and decaying animals. “When we started cleaning up, all the streams were blocked up everywhere: rubbish, dead dogs … a bit of everything,” Monges said. Recognizing the health and ecological hazards posed by the pollution, she began mobilizing neighbors to assist with cleanup activities.

Monges’s grassroots campaign, which began around 2003, grew steadily over the years. By 2005, the group succeeded in securing support from the provincial government, which provided tools, uniforms, and training to aid their efforts. Today, Monges leads the cooperative known as 96 Jula, a workers' organization that operates Monday through Friday to maintain the cleanliness of the small streams feeding into the Reconquista.

The cooperative’s work represents a community-driven response to longstanding environmental neglect in the region. While the Reconquista continues to face numerous challenges due to industrial waste, insufficient sanitation infrastructure, and urban runoff, local initiatives like 96 Jula emphasize the role of citizen involvement in environmental remediation. Their efforts contribute not only to improving water quality but also to raising awareness about the importance of protecting this critical resource.

Authorities have occasionally partnered with community groups to address the pollution, but comprehensive solutions remain complex. The Reconquista’s condition reflects broader regional issues related to water management and urban expansion in Argentina’s Buenos Aires province. Nonetheless, the dedication of activists like Monges and the members of 96 Jula highlights the impact of sustained local engagement in confronting environmental problems.