# Argentina water quality and environmental litigation > Live situation record from CLSTR: https://clstr.news/situations/argentina-water-quality-and-environmental-litigation > Updated: 2026-09-18T14:41:15.000Z. Sources: 14. Developments: 2. Legal and regulatory actions regarding water quality and environmental protection are being implemented across various regions of Argentina. In San Luis, the agency San Luis Agua has increased monitoring of reservoirs and rivers in the Ayacucho department, including the Luján dam and Quines River, to analyze physicochemical and microbiological properties for the Luján aqueduct. In Buenos Aires province, a judicial ruling ordered the provincial government and ABSA to ensure tap water complies with the Argentine Food Code. This follows a 16-year legal dispute by residents of 9 de Julio concerning arsenic, nitrate, and fluoride levels. The court established an arsenic limit of 0.01 mg/l and affirmed access to potable water as a fundamental right. Additionally, in Entre Ríos, Federal Justice has permitted the collection of water samples from the Uruguay River. This action is part of a lawsuit aimed at preventing environmental damage related to a proposed HIF Global fuel plant project in Paysandú, Uruguay, near the Argentine coast of Colón. ## Timeline ### 2026-09-18: Regional updates across Argentina and Paraguay Regional updates from Argentina and Paraguay include environmental monitoring of fish migrations in the Paraná River, military demonstrations in Rosario, and international tourism events in Chubut. 12 sources. https://clstr.news/cluster/patagonia-austral-marine-park-receives-institutional-support-for-tourism ### 2026-09-02: Water quality and environmental legal actions reported across Argentina Water quality and environmental protection face scrutiny in Argentina through new monitoring in San Luis, a landmark arsenic contamination ruling in Buenos Aires, and river sampling in Entre Ríos. 2 sources. https://clstr.news/cluster/water-quality-and-environmental-legal-actions-reported-across-argentina --- Cite as: Argentina water quality and environmental litigation. CLSTR, https://clstr.news/situations/argentina-water-quality-and-environmental-litigation