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Calidad del agua en estaciones seleccionadas del Lago Chapala |
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Concepto |
Unidades |
2000 |
2005 |
2006 |
2007 |
2008 |
2009 |
2010 |
2011 |
2012 |
2013 |
2014 |
2015 |
2016 |
2017 |
2018 |
2019 |
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Estación de medición |
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Nombre |
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Chapala |
Chapala |
Chapala |
Chapala |
Chapala |
Chapala |
Estación lacustre 11 |
Estación lacustre 11 |
Estación lacustre 11 |
Estación lacustre 11 |
Estación lacustre 11 |
Estación lacustre 11 |
Estación lacustre 11 |
Estación lacustre 11 |
Estación lacustre 11 |
Estación lacustre 11 |
|
Frecuencia de muestreo anual |
Número |
2 |
8 |
8 |
10 |
4 |
2 |
7 |
8 |
5 |
2 |
2 |
2 |
2 |
2 |
3 |
1 |
|
Parámetros (mediana anual) |
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Temperatura |
°C |
18 |
22 |
23.1 |
23.6 |
24 |
24.5 |
23.7 |
23.70 |
22.7 |
23.45 |
22.65 |
22.85 |
25.85 |
23.7 |
22.8 |
19.5 |
|
Acidez |
pH |
8.680 |
8.395 |
8.56 |
8.09 |
8 |
6.5 |
8.42 |
8.695 |
9.1 |
n d |
9.13 |
8.8 |
9.05 |
9 |
8.8 |
8.66 |
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Oxígeno disuelto |
mg O2 / l |
8.60 |
6.85 |
7.35 |
7.6 |
7.19 |
7.27 |
6.91 |
5.24 |
6.9 |
nd |
6.265 |
6.9 |
7.3 |
7 |
7.1 |
7.36 |
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Saturación de oxígeno |
% |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
96.6 |
nd |
85.5 |
96.45 |
107.8 |
96.95 |
99 |
96.2 |
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DBO (20°C 5d) |
mg O2/ l |
2.00 |
1.20 |
1.25 |
1.5 |
6.75 |
1.205 |
1.5 |
<4.87 |
1.26 |
2.98 |
7.215 |
2.925 |
2.685 |
3.645 |
1 |
<2 |
|
DQO (K2Cr2O7) |
mg O2/ l |
47 |
42 |
42.5 |
37.5 |
37 |
24.415 |
28.15 |
23.55 |
31.03 |
35.9214 |
50.45 |
52.2 |
48.595 |
56.11 |
23.41 |
47.57 |
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Sólidos suspendidos |
mg/ l |
120 |
34 |
28 |
36 |
16.5 |
6 |
14 |
14 |
19.50 |
29.75 |
41 |
55 |
196.965 |
103.78 |
17.5 |
12 |
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Sólidos disueltos |
mg/ l |
802 |
508 |
549 |
557 |
538.5 |
555.5 |
573 |
614 |
701 |
578.24 |
543.04 |
598.08 |
629.44 |
608 |
496 |
487.04 |
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Nitrógeno total |
mg N/ l |
nd |
nd |
nd |
nd |
nd |
nd |
1.9 |
1.915 |
1.72 |
1.3395 |
1.249 |
1.33419 |
1.88728 |
1.74648 |
1.31682 |
1.17248 |
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Nitratos |
mg NO3/ l |
0.195 |
0.185 |
0.185 |
0.2 |
0.37 |
0.325 |
<0.25 |
0.2 |
0.015 |
0.02485 |
0.0425 |
0.01138 |
0.05847 |
0.03574 |
0.15043 |
0.29490 |
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Amonio |
mg NH4/ l |
nd |
0.143 |
0.393 |
0.139 |
0.945 |
1.014 |
0.536 |
0.222 |
0.124 |
nd |
0.04207 |
0.07939 |
0.24261 |
0.15125 |
0.15601 |
0.09567 |
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Fósforo total |
mg P/ l |
0.57 |
0.595 |
nd |
nd |
0.48 |
0.425 |
0.55 |
0.655 |
0.58 |
0.50785 |
0.6055 |
0.69871 |
1.02490 |
0.73958 |
0.44516 |
0.35998 |
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Ortofosfatos |
mg P/ l |
0.460 |
0.540 |
0.545 |
0.65 |
nd |
nd |
0.51 |
0.5 |
0.44 |
0.4346 |
0.513 |
0.53259 |
0.45259 |
0.41522 |
0.38178 |
0.35998 |
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Clorofila (en verano) |
mg /m3 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
4.39 |
6.6358 |
18.72 |
25.693 |
<0.1 |
0.6202 |
<0.1 |
<0.1 |
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Coliformes fecales |
NMP/100 ml |
10 |
nd |
nd |
nd |
nd |
<3 |
<3 |
<3 |
313 |
157.75 |
12239 |
1655 |
13552.5 |
13636 |
738 |
700 |
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Arsénico total |
mg As/ l |
nd |
nd |
nd |
nd |
nd |
0.0177 |
0.0141 |
0.0133 |
0.0047 |
0.0229 |
0.02455 |
0.02 |
0.0086975 |
0.0099975 |
0.017 |
0.000695 |
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Cadmio total |
mg Cd/ l |
nd |
nd |
nd |
nd |
nd |
nd |
<0.001 |
<0.00058 |
<0.0005 |
<0.0002 |
<0.0002 |
<0.0002 |
<0.0002 |
<0.0002 |
<0.0002 |
<0.00023 |
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Cromo total |
mg Cr/ l |
nd |
nd |
nd |
nd |
nd |
nd |
<0.05 |
<0.05 |
<0.05 |
0.00425 |
0.00192 |
<0.00088 |
0.01107 |
0.00517 |
0.0074 |
0.0037 |
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Cobre total |
mg Cu/ l |
nd |
nd |
nd |
nd |
nd |
nd |
<0.1 |
<0.05 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
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Plomo total |
mg Pb/ l |
nd |
nd |
nd |
nd |
nd |
nd |
<0.005 |
<0.0025 |
<0.0025 |
<0.00154 |
<0.00154 |
<0.00154 |
<0.00154 |
<0.00154 |
<0.00154 |
0.0171 |
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Mercurio total |
mg Hg/ l |
nd |
nd |
nd |
nd |
nd |
nd |
<0.001 |
<0.00057 |
0.00057 |
0.00025 |
0.000164 |
0.000123 |
0.00012 |
0.0002525 |
0.000099 |
<0.00009 |
|
Níquel total |
mg Ni/ l |
nd |
nd |
nd |
nd |
nd |
nd |
<0.1 |
<0.1 |
<0.1 |
0.00285 |
0.00255 |
<0.0002 |
0.0083 |
0.004 |
0.0047 |
0.0032 |
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Zinc total |
mg Zn/ l |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
<0.022 |
<0.02 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
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Notas: |
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La fuente reporta los datos con medianas en vez de promedios debido a la alta sensibilidad de los promedios a los valores extremos. |
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Ubicación geográfica de las estaciones de medición. Estación lacustre 11: 20° 13' 48'' Lat N, 103° 10' 48'' long. W (los nombres de estación que se presentan corresponden a la misma). |
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nd. No disponible |
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Fuente: |
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Comisión Nacional del Agua, Gerencia de Calidad del Agua, Junio 2020 |
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