KERAPCD RULE 603 EPISODE CRITERIA LEVELS
LAST REVISED 06/29/91

RULE 603 - Episode Criteria Levels - Adopted 1974, Renumbered 5/89, Amended 6/29/81

Averaging Time Health Advisory Stage 1 (Alert) Stage 2 (Warning) Stage 3 (Emergency)
Photochemical Oxidant

(Including Ozone)

1 Hour 0.15 ppm 0.20 ppm 0.35 ppm 0.50 ppm for 1 hr*
1 Hour 40 ppm 75 ppm 100 ppm for 1 hr*
Carbon Monoxide 4 Hours 25 ppm 45 ppm 60 ppm
12 Hours 20 ppm 35 ppm 50 ppm
8 Hours 15 ppm 30 ppm 40 ppm
Particulate Matter 24 Hours 375 ug/m3 625 ug/m3 875 ug/m3

* and predicted to persist for one additional hour.