2002 Almanac (page 360) Table A-47 Mountain Counties - Plumas County - Air Quality Trends OZONE (ppm) 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 Peak 1-Hour Indicator 0.09 0.09 0.087 0.09 0.094 0.094 0.096 0.083 0.084 0.083 National 1-Hr. Design Value 0.08 0.08 0.05 0.08 0.09 0.09 0.091 0.091 0.081 0.083 0.083 Nat. 8-Hr. Design Value 0.073 0.071 0.037 0.053 0.062 0.077 0.078 0.065 0.06 0.06 0.07 Maximum 1-Hr. Concentration 0.09 0.08 0.05 0.09 0.09 0.105 0.091 0.046 0.087 0.086 0.081 Max. 8-Hr. Concentration 0.078 0.073 0.04 0.076 0.083 0.096 0.08 0.042 0.074 0.077 0.076 Days Above State Standard 0 0 0 0 0 1 0 0 0 0 0 Days Above Nat. 1-Hr. Std. 0 0 0 0 0 0 0 0 0 0 0 Days Above Nat. 8-Hr. Std. 0 0 0 0 0 2 0 0 0 0 0 PM10 (ug/m3) 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 Max. 24-Hour Concentration 153 144 138 162 120 130 98 52 55 66 74 125 75 Max. Annual Geometric Mean 28.7 28.7 21.7 18.8 22.5 22.5 Calc Days Above State 24-Hr Std 72 66 72 90 84 90 39 6 6 30 18 30 24 Calc Days Above Nat 24-Hr Std 0 0 0 6 0 0 0 0 0 0 0 0 0 CARBON MONOXIDE (ppm) 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 Peak 8-Hr. Indicator 4.5 4.5 Max. 1-Hr. Concentration 6 3 Max. 8-Hr. Concentration 4.2 2.3 Days Above State 8-Hr. Std. 0 0 Days Above Nat. 8-Hr. Std. 0 0 NITROGEN DIOXIDE (ppm) 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 Peak 1-Hr. Indicator 0.046 0.046 Max. 1-Hr. Concentration 0.05 0.04 Max. Annual Average SULFUR DIOXIDE (ppm) 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 Peak 1-Hr. Indicator Max. 24-Hr. Concentration Max. Annual Average