Nitrate temporal and spatial patterns in 12 water-supply wells, Yucatan, Mexico |
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| Authors: | J Pacheco Luis Marín Armando Cabrera Birgit Steinich Oscar Escolero |
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| Institution: | (1) Instituto de Geofísica-UNAM, Ciudad Universitaria, Mexico City, Mexico CP 04510 e-mail: pavila@tunku.uady.mx Tel: 99-410191, ext 129 Fax: 99-410189, MX;(2) Facultad de Ingeniería-UADY, Apdo. Postal 150, Cordemex, Mérida, Yucatán, Mexico CP 97111, MX;(3) Unidad de Ciencias de la Tierra, Apdo. Postal, Juriquilla, Queretaro, Instituto de Geofísica-UNAM, Mexico, MX |
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| Abstract: | 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.
Received: 14 December 1999 · Accepted: 2 May 2000 |
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| Keywords: | Agricultural practices Groundwater contamination Karst Nitrate |
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