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Indoor air quality standard

Indoor air quality standard

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[Abstract]:
There are two indoor air quality standards in China, one for the Ministry of Health and one for the Ministry of Construction.

They are: GB/T18883-2002 GB50325-2001
There are two indoor air quality standards in China, one for the Ministry of Health and one for the Ministry of Construction.
 
They are: GB/T18883-2002 GB50325-2001

National Standard for Indoor Environment 《GB50325-2001》

Contaminant name One type of construction Second type construction project Standard
formaldehyde ≤ 0.08mg/m3 ≤ 0.12mg/m∧3 GB50325-2001
benzene ≤ 0.09mg/m3 ≤ 0.09mg/m∧3 GB50325-2001
ammonia ≤ 0.20mg/m3 ≤ 0.50mg/m∧3 GB50325-2001
radon ≤ 200Bq/m3 ≤ 400Bq/m∧3 GB50325-2001
TVOC ≤ 0.5mg/m3 ≤ 0.6mg/m∧3 GB50325-2001


Note: One type of building: residential, hospital, elderly apartment, kindergarten, school classroom, etc.

     Class II buildings: office buildings, businesses, hotels, cultural and entertainment venues, bookstores, exhibition halls, libraries, gymnasiums, public transportation, restaurants, barbershops, etc.

 

National standard for indoor environmentGB/T18883-2002

Serial number parameter unit standard Remarks:
1 formaldehyde mg/m∧3 0.10 1 hour average
2 ammonia mg/m∧3 0.20 1 hour average
3 benzene mg/m∧3 0.11 1 hour average
4 radon Bq/m∧3 400 Annual average (action level*)
5 Total Volatile Organic Compounds TVOC mg/m∧3 0.60 8-hour mean
Remarks: *Action level means recommending action to reduce radon concentration.