Classification of cleanliness levels

Classification of cleanliness levels

  The classification of room cleanliness is the classification of the cleanliness of the surface of an object, which is generally divided into 5 grades: standard grade, A grade, B grade, C grade and D grade. Standard level requirements: the total amount of dust is less than 500/m2, and the total number of microorganisms is less than 5000/m2. Class A standard: the total amount of dust is less than 100/m2, and the total number of microorganisms is less than 1000/m2. Class B standard: the total amount of dust is less than 10/m2, and the total number of microorganisms is less than 100/m2. Class C standard: the total amount of dust is less than 1/m2, and the total number of microorganisms is less than 10/m2. Class D standard: the total amount of dust is less than 0.1/m2, and the total number of microorganisms is less than 1/m2.

   The less the total amount of dust and microorganisms on the ground, the less suspended matter in the air, and the better the air quality. Therefore, it is necessary to strictly abide by the cleanliness level standards to ensure a comfortable and hygienic living environment.

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