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Illinois Administrative Code (Last Updated: March 27, 2024) |
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TITLE35. ENVIRONMENTAL PROTECTION |
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PART244. EPISODES |
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SUBPARTD. EPISODE STAGES |
§244.161. Advisory, Alert and Emergency Levels:
Latest version.
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Pollutant
Averaging Time
Advisory
Yellow Alert
Red Alert
Emergency
Sulfur dioxide
(ppm)
2-hour
0.30
--
--
--
4-hour
--
0.30
0.35
0.40
(PM10
µg/m3
2-hour
420
--
--
--
24-hour
--
350
420
500
Carbon Monoxide
(ppm)
2-hour
30
--
--
8-hour
--
15.
30.
40.
Ozone (ppm)
1-hour
0.12
0.20
0.30
0.50
Nitrogen dioxide
(ppm)
2-hour
0.40
--
--
--
1-hour
--
0.60
1.20
1.60
24-hour
--
0.15
0.30
0.40
(Source: Amended at 16 Ill. Reg. 8191, effective May 15, 1992)