Nitrate temporal and spatial patterns in 12 water-supply wells, Yucatan, Mexico

Pacheco, J.; Marín, Luis; Cabrera, Armando; Steinich, Birgit; Escolero, Oscar
March 2001
Environmental Geology;Mar2001, Vol. 40 Issue 6, p708
Academic Journal
The nitrate concentration in 12 water-supply wells were monitored for the period April 1992 to March 1993. Each water-supply well was sampled once a month. The nitrate concentrations in the 12 wells ranged from 7 to 156 mg/l. Two water-supply wells (Chacsinkin and Peto) showed concentrations that reached 3.5 times the maximum permissible limit for the Drinking Water Standard (45 mg/l). A third water-supply well (Akil) exceeds the norm for 7 out of 12 months. The use of nitrogen-rich fertilizers are responsible for high nitrate concentrations in groundwater in the southern part of Yucatan, Mexico where intensive agricultural practices exist.


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