Calidad del agua en estaciones seleccionadas del Lago Tequesquitengo | ||||||||||||||||||||
Concepto | Unidades | 1990 | 1995 | 2000 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | |
Estación de medición | ||||||||||||||||||||
Nombre | Tequesquitengo (Al centro lag) | |||||||||||||||||||
Número | 10 | 12 | 4 | 4 | 4 | 3 | 4 | 4 | 4 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 1 | |||
Parámetros (mediana anual) | ||||||||||||||||||||
Temperatura | °C | 29 | 26.5 | nd | 29 | 25 | 26.15 | 24.85 | 26.3 | 30.05 | 30.35 | 25 | 30.25 | 28.4 | 29.9 | 27.9 | 28.25 | 26.1 | 24.8 | |
Acidez | pH | 8.6 | 8.18 | nd | 8.10 | 8.13 | 8.44 | 8.4 | 8.92 | 8.89 | 8.42 | 8 | nd | 8.55 | 8.35 | 8.4 | 8.4 | 8.3 | 8.1 | |
Oxígeno disuelto | mg O2 / l | 6.95 | 6.5 | nd | 6.25 | 7.60 | 6.14 | 5.05 | 4.38 | 4.8 | 6.11 | 4.08 | nd | 8.05 | 8.375 | 7.65 | 8.85 | 3.15 | 7.5 | |
Saturación de oxígeno | % | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | 57.1 | nd | 117.95 | 112.35 | 109.8 | 126.95 | 45.9 | 99.9 | |
DBO (20°C 5d) | mg O2/ l | 2.39 | 1.75 | nd | <2 | <2 | <2 | 2.33 | 2.89 | <2 | 2.4 | 2 | 3.7 | 2.25 | 3.715 | 4 | 8.62 | 6.4 | <2 | |
DQO (K2Cr2O7) | mg O2/ l | 19 | 18.3 | nd | 20.1 | 27.72 | 27.8 | 31.91 | 11.65 | 30.04 | 20.8 | 15.38 | 25.34 | 44.185 | 62.595 | 35.265 | 23.32 | 31.21 | 35.9 | |
Sólidos suspendidos | mg/ l | 27 | 22 | nd | 24 | 22 | 33 | 31 | 10 | 14 | 14 | <10 | 14 | <10 | <10 | 20 | <10 | <10 | <10 | |
Sólidos disueltos | mg/ l | 3567 | 3568 | nd | 4001 | 4230 | 4061 | 4108 | 3909 | 4072 | 2433 | 2559.36 | 2411.52 | 2457.6 | 2341.216 | 2439.04 | 2348.8 | 2393.6 | 2547.2 | |
Nitrógeno total | mg N/ l | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | 2.239 | 1.064 | 2.2930 | 2.0191 | 2.2069 | 2.0446 | 2.3368 | 2.0021 | |
Nitratos | mg NO3/ l | 0.1 | 0.205 | nd | <0.025 | <0.025 | 0.10 | <0.1 | <0.1 | <0.1 | <0.1 | <0.004 | 0.044 | 0.0845 | 0.2689 | 0.1403 | 0.0310 | 0.0610 | 0.0352 | |
Amonio | mg NH4/ l | 0.040 | 0.045 | nd | 0.047 | 0.14 | 0.08 | 0.30 | 0.78 | 0.17 | 0.45 | nd | nd | 0.4148 | 0.6291 | 0.4091 | 0.8971 | 0.2218 | 0.9200 | |
Fósforo total | mg P/ l | nd | nd | nd | <0.52 | <0.52 | <0.3 | <0.3 | <0.3 | <0.3 | <0.3 | <0.001 | 0.023 | 0.0215 | 0.0876 | 0.0498 | 0.0425 | 0.0454 | 0.1279 | |
Ortofosfatos | mg P/ l | nd | 0.01 | nd | <0.26 | <0.26 | <0.3 | <0.3 | <0.3 | <0.3 | <0.3 | <0.001 | 0.014 | 0.0078 | 0.0332 | 0.0415 | 0.0092 | 0.0345 | 0.0227 | |
Clorofila (en verano) | mg /m3 | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | 144.410 | 8.979 | 1.195 | 7.07235 | 5.6518 | 0.6728 | <0.1 | <0.1 | |
Coliformes fecales | NMP/100 ml | 13.5 | 200 | nd | 66 | 1.5 | 550 | 10 | nd | nd | nd | 4 | <3 | <3 | <3 | 50 | 12.5 | <10 | 41 | |
Arsénico total | mg As/ l | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | 0.0049 | 0.0072 | 0.0057 | <0.00139 | <0.00139 | <0.00139 | <0.00139 | <0.00139 | |
Cadmio total | mg Cd/ l | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | <0.0002 | <0.0002 | <0.0002 | 0.000378 | <0.0002 | <0.0002 | <0.0002 | <0.00023 | |
Cromo total | mg Cr/ l | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | 0.00088 | <0.00088 | 0.01812 | 0.0027535 | 0.0033475 | <0.00088 | <0.00088 | <0.00088 | |
Cobre total | mg Cu/ l | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | |
Plomo total | mg Pb/ l | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | <0.00154 | <0.00154 | <0.00154 | 0.0029295 | 0.0084715 | <0.00154 | <0.00154 | 0.0289 | |
Mercurio total | mg Hg/ l | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | <0.00009 | <0.00009 | <0.00009 | <0.00009 | <0.00009 | <0.00009 | <0.00009 | <0.00009 | |
Níquel total | mg Ni/ l | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | <0.0002 | 0.0022 | 0.0163 | 0.0017815 | 0.0054795 | <0.0002 | <0.0002 | <0.0002 | |
Zinc total | mg Zn/ l | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | nd | |
Notas: | ||||||||||||||||||||
La fuente reporta los datos con medianas en vez de promedios debido a la alta sensibilidad de los promedios a los valores extremos. | ||||||||||||||||||||
No se muestreo el sitio en el año 2000, por lo que no información disponible. | ||||||||||||||||||||
Ubicación geográfica de la estación de medición. Tequesquitengo (Al centro lag): 18°37'35.22 Lat N, 99°16'17.65 long. W (los nombres de estación que se presentan corresponden a la misma). | ||||||||||||||||||||
nd: No disponible. | ||||||||||||||||||||
Fuente: | ||||||||||||||||||||
Comisión Nacional del Agua, Gerencia de Calidad del Agua, Junio 2020 |