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| | Promedio anual de concentraciones horarias de contaminantes atmosféricos | | | | | CO (ppm) | NO2 (ppm) | O3 (ppm) | SO2 (ppm) | PM10 (µg/m³) | PM2.5 (µg/m³) | | | | | | | | | | Mexicali | 1997 | 1.950 | 0.018 | 0.030 | 0.007 | 93.370 | - | | | 1998 | 2.090 | 0.022 | 0.031 | 0.003 | 86.210 | - | | | 1999 | 2.100 | 0.024 | 0.029 | 0.004 | 105.650 | - | | | 2000 | 1.960 | 0.023 | 0.020 | 0.005 | 124.720 | - | | | 2001 | 1.720 | 0.020 | 0.024 | 0.004 | 97.650 | - | | | 2002 | 1.850 | 0.023 | 0.025 | 0.006 | 125.410 | - | | | 2003 | 1.575 | 0.022 | 0.027 | 0.009 | 115.630 | 59.990 | | | 2004 | 1.460 | 0.020 | 0.026 | 0.005 | 105.590 | 53.710 | | | 2005 | 1.150 | 0.021 | 0.027 | 0.004 | 89.890 | 59.740 | | | 2006 | 0.900 | 0.019 | 0.029 | 0.003 | 113.540 | 53.910 | | | 2007 | 0.720 | 0.021 | 0.026 | 0.002 | 133.660 | 61.780 | | | 2008 | 0.780 | 0.020 | 0.028 | 0.003 | 118.010 | 50.980 | | | 2009 | - | - | - | - | 137.170 | - | | Tijuana | 1997 | 1.100 | 0.015 | 0.028 | 0.005 | 55.720 | - | | | 1998 | 0.970 | 0.016 | 0.028 | 0.003 | 52.200 | - | | | 1999 | 0.970 | 0.018 | 0.028 | 0.003 | 60.700 | - | | | 2000 | 1.010 | 0.019 | 0.025 | 0.004 | 52.730 | - | | | 2001 | 0.940 | 0.019 | 0.025 | 0.003 | 47.260 | - | | | 2002 | 0.860 | 0.018 | 0.027 | 0.003 | 52.060 | - |
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