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Table 8 Concentration-passing rates of PM10, bacteria, fungi, and β-hemolytic streptococcus in supply air of central air-conditioning and ventilation systems in public places of Chinaa

From: Indoor Air Pollution and Its Control in China

Area Sampling time Number of public place PM10 Bacteria Fungi β-Hemolytic streptococcus References
Sample number Passing rateb (%) Sample number Passing ratec (%) Sample number Passing rated (%) Sample number Passing ratee (%)
Zhejiang 2011 180 179 79.3 179 62.6 179 74.3 179 100.0 [44]
Hebei (Shijiazhuang) 2010 22 110 95.4 110 99.1 110 100.0 [33]
Pearl River Delta 2009–2010 25 112 75.9 112 73.2 112 97.3 112 100.0 [35]
Guangdong (Zhongshan) 2009 18 183 86.3 183 76.5 183 100.0 [36]
Fujian (Xiamen) 2009 43 31 93.6 31 90.3 31 96.8 398 100.0 [37]
Zhejiang 2009 240 239 64.4 240 71.7 240 76.7 240 100.0 [38]
Liaoning (Dalian) 2008 14 14 57.1 66 47.0 66 71.2 [40]
Beijing 2008 12 56 33.9 56 58.9 56 100.0 [41]
Hunan (Changsha) 2008 15 33 27.3 33 39.4 33 48.5 [41]
Tianjin 2006 16 164 40.2 164 59.1 164 100.0 [42]
Heilongjiang (Harbin) 2006 20 20 45.0 20 0 20 75.0 [45]
  1. aEvaluated based on the “Hygienic norm for central air-conditioning and ventilation systems in public places” of China
  2. bPercentage of samples with PM10 concentrations ≤ 0.08 mg/m3
  3. cPercentage of samples with bacteria concentrations ≤ 500 cfu/cm3
  4. dPercentage of samples with fungi concentrations ≤ 500 cfu/cm3
  5. ePercentage of samples with no detectable β-hemolytic streptococcus