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Mexican national water authority Conagua plans to inject water from a new wastewater treatment plant in Ecatepec, Mexico state (Edomex) into the subsoil to help replenish the area's dwindling aquifers.
The El Caracol plant, currently at the executive project phase, will have a 4m3/s capacity and will draw water from the Río de la Compañía canal and nearby general water drain, Conagua said in a release.
Around 75% of wastewater treated at the plant will be reused for irrigation or released into the Texcoco lake, while the remainder will be injected into the subsoil in Ecatepec.
Conagua is currently undertaking geographical studies to pinpoint the ideal location to inject the treated wastewater, which will total 31.5Mm3/y.
The overuse of aquifers in the Mexico valley area is aggravated by unplanned urbanization, which has contaminated or destroyed the soil, the authority said.