Concepto |
Unidades |
1990 |
1995 |
2000 |
2005 |
2006 |
2007 |
2008 |
2009 |
2010 |
2011 |
2012 |
2013 |
Estación de medición |
Nombre |
|
Chapala |
Chapala |
Chapala |
Chapala |
Chapala |
Chapala |
Chapala |
Chapala |
Estación lacustre 11 |
Estación lacustre 11 |
Estación lacustre 11 |
Estación lacustre 11 |
Frecuencia
de muestreo anual |
Número |
11 |
nd |
2 |
6 |
7 |
10 |
6 |
6 |
7 |
8 |
1 |
2 |
Parámetros (promedio anual) |
Temperatura |
°C |
26.2 |
nd |
23.3 |
21.7 |
23.5 |
23.24 |
22.92 |
23.77 |
24.1 |
23.15 |
20.300 |
23.45 |
Acidez |
pH |
8.92 |
nd |
nd |
8.44 |
8.43 |
7.88 |
7.61 |
7.86 |
8.55 |
8.41 |
9.1 |
nd |
Oxígeno
disuelto |
mg O2 / l |
7.6 |
nd |
8.6 |
6.5 |
7.1 |
7.52 |
7.19 |
6.09 |
7.01 |
5.52 |
7.37 |
nd |
Saturación
de oxígeno |
% |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
96.6 |
nd |
DBO (20°C
5d) |
mg O2/ l |
1.71 |
nd |
2 |
3.08 |
1.38 |
2.04 |
9.44 |
1.2 |
1.47 |
<4.87 |
5.11 |
2.98 |
DQO (K2Cr2O7) |
mg O2/ l |
30 |
nd |
47 |
67 |
35.9 |
38.2 |
47.17 |
39.14 |
28.02 |
25.76 |
52.99 |
35.92 |
Sólidos
suspendidos |
mg/ l |
52 |
nd |
66 |
94 |
29.2 |
34.7 |
15.5 |
14 |
16 |
12 |
31.43 |
29.75 |
Sólidos
disueltos |
mg/ l |
662 |
nd |
802 |
514 |
560 |
561.2 |
528.25 |
552.5 |
568.29 |
597.38 |
441.6 |
578.24 |
Nitrógeno
total |
mg N/ l |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
1.92 |
2.34 |
0.953 |
1.34 |
Nitratos |
mg NO3/ l |
0.15 |
nd |
0.195 |
0.2 |
0.203 |
1.14 |
2.05 |
1.64 |
0.95 |
0.32 |
0.078 |
0.11 |
Amonio |
mg NH4/ l |
0.41 |
nd |
nd |
0.4 |
2.923 |
0.33 |
0.51 |
0.8 |
1.03 |
0.6 |
0.0034 |
0.21 |
Fósforo
total |
mg P/ l |
nd |
nd |
0.57 |
0.66 |
nd |
nd |
nd |
0.47 |
0.55 |
0.65 |
0.4 |
0.51 |
Ortofosfatos |
mg P/ l |
0.24 |
nd |
0.46 |
0.52 |
0.58 |
1.33 |
0.66 |
0.09 |
0.51 |
0.5 |
0.38 |
0.4346 |
Clorofila
(en verano) |
mg /m3 |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
4.39 |
6.64 |
Coliformes
fecales |
NMP/100 ml |
nd |
nd |
5 |
nd |
nd |
nd |
120 |
200 |
<3 |
230,059 |
10,462 |
315 |
Arsénico
total |
mg As/ l |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
0.01 |
0.01 |
0.02 |
0.0229 |
Cadmio
total |
mg Cd/ l |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
<0.001 |
<0.00058 |
<0.00015 |
<0.00015 |
Cromo
total |
mg Cr/ l |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
<0.05 |
0.05 |
<0.05 |
0.00031 |
0.00425 |
Cobre
total |
mg Cu/ l |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
<0.1 |
<0.050 |
<0.00022 |
nd |
Plomo
total |
mg Pb/ l |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
<0.005 |
<0.0025 |
<0.00154 |
<0.00154 |
Mercurio
total |
mg Hg/ l |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
<0.001 |
<0.00057 |
0.0012 |
0.00025 |
Níquel
total |
mg Ni/ l |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
<0.1 |
<0.1 |
<0.00015 |
<0.00015 |
Zinc total |
mg Zn/ l |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
nd |
0.07 |
<0.022 |
nd |
nd |
Notas: |
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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). |
nd. No disponible |
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Fuente: |
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Comisión Nacional del Agua, Gerencia de
Calidad del Agua, Febrero 2015 |
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