NOM-003-CONAGUA-1996 requirements during the construction of water extraction wells for preventing the contamination of aquifers.
*Published in January 14, 2009 in the DOF. The CNA = "Comisión Nacional de Agua" (National Water Commission is changed to CONAGUA = "Comité Consultivo Nacional de Normalización del Sector Agua", National Consultative Committee of Standardization of the Water Sector - CNA is changed to CONAGUA in all the water standards.
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