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Cleanroom standards:

All cleanroom areas should be either classified or non-classified. All classified areas should conform to an applicable standard. This standard is dependant upon geographic location and usage. Particulate levels for the two main world standards are listed below.

 

ISO 14644-1 cleanroom standards

 

maximum particles/m
Class ≥0.1 m ≥0.2 m ≥0.3 m ≥0.5 m ≥1 m ≥5 m
ISO 1

10

2

 

 

 

 

ISO 2

100

24

10

4

 

 

ISO 3

1,000

237

102

35

8

 

ISO 4

10,000

2,370

1,020

352

83

 

ISO 5

100,000

23,700

10,200

3,520

832

ISO 6

1,000,000

237,000

102,000

35,200

8,320

293

ISO 7

 

 

 

352,000

83,200

2,930

ISO 8

 

 

 

3,520,000

832,000

29,300

ISO 9

 

 

 

35,200,000

8,320,000

293,000

 

US FED STD 209E cleanroom standards

 

maximum particles/ft
Class ≥0.1 m ≥0.2 m ≥0.3 m ≥0.5 m ≥5 m
1

35

7

3

1

 

10

350

75

30

10

 

100

 

750

300

100

 

1,000

 

 

 

1,000

7

10,000

 

 

 

10,000

70

100,000

 

 

 

100,000

700

NOTE: US FED STD 209E was canceled November 29, 2001

 

And just so that you know.......... here's the ISO list

ISO-14644-1 Classification of Air Cleanliness

ISO-14644-2 Testing and Monitoring to prove Compliance

ISO-14644-3 Metrology & Test Methods

ISO-14644-4 Design, Construction and Start-up

ISO-14644-5 Operations

ISO-14644-6 Vocabulary

ISO-14644-7 Separative Devices

ISO-14644-8 Classification of Airborne Molecular Contamination

ISO-14644-9 Clean Surfaces

 

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