Parameter

IDPH

NHMRC

NIOSH

OSHA

ACGIH

Relative humidity

20% - 60%

-

20% - 60%

20% - 60%

-

Temperature (˚C)

20 - 24 (winter)

20 - 26

20 - 24.5

20 - 26

-

-

22.8 - 26.1 (summer)

-

-

Carbon dioxide

1000 ppm

800 ppm preferred

-

1000

5000 ppm

5000 ppm

Carbon monoxide

9 ppm

9 ppm (8 hours)

35 ppm

50 ppm

25 ppm

Volatile organic compounds

-

500 µg/m³

(0.218 ppm)

(1 hour)

-

Sulfur dioxide

-

200 ppb (1 hour)

2 ppm

(5 ppm/15 minute)

5 ppm (8 hr)

5 ppm (15 min)

Hydrogen sulfide

0.01 ppm

-

-

20 ppm

10 ppm

Ozone

0.08 ppm

0.1 ppm

0.1 ppm

0.05 ppm

Nitrogen dioxide

0.05 ppm

(24 hours average)

-

1 ppm/15 min

3 ppm

5 ppm (8 hr)

5 ppm (15 min)

Nitric Oxide

-

-

-

25 ppm

-

Ammonia

-

-

-

50 ppm

-

PM 10

150 µg/m³

-

-

-

-

PM 2.5

65 µg/m³

5000 µg/m³

3000 µg/m³

-

-

TSP

-

15,000 µg/m³

10,000 µg/m³

-

-