Sites with perchloroethylene data available Available Substances Order a Data CD Toxics Statistics Home Page Data Descriptions Page
California Home ARB: Home Search Site Map Links Software Contact Us AQD: Home
California Air Resources Board

Annual Toxics Summary		 ARB's ADAM Air Quality Database
Bakersfield-5558 California Avenue
Perchloroethylene
parts per billion
Year Months
Present		 Minimum Median Mean 90th
Percentile		 Maximum Standard
Deviation		 Number of
Observations		 Detection
Limit		 Estimated
Risk
2002
0.01 0.04 0.047 0.08 0.11 0.025 30 0.01 2
2001
0.02 0.05 0.058 0.12 0.28 0.054 31 0.01 2
2000
0.005 0.04 0.065 0.12 0.24 0.050 30 0.01 3
1999
0.005 0.05   0.10 0.15 0.035 22 0.01  
1998
0.005 0.03   0.10 0.21 0.049 28 0.01  
1997
0.005 0.03 0.039 0.06 0.16 0.035 32 0.01 2
1996
0.005 0.03 0.119 0.22 1.5 0.264 32 0.01 5
1995
0.01 0.05 0.092 0.17 1.0 0.182 32 0.01 4
1994
0.005 0.03   0.12 0.33 0.072 23 0.01  
1993
            0    
1992
            0    
1991
            0    
1990
            0    
1989
            0    
Notes:  Values below the Limit of Detection (LoD) assumed to be ½ LoD.
Means and risks shown only for years with data in all 12 months.
Risks shown only for those substances with unit risk factors.