Smoke School Information in Hawaii

Hawaii Acceptance Status for VirtualOpacity^® — EPA ALT-152A

Accepted.

Hawaii Acceptance Letter »

Hawaii Visible Emissions / Opacity Standard

The opacity limit for Hawaii is Pre-March 21, 1972 sources: 40% opacity; sources constructed/modified/relocated after March 20, 1972: 20% opacity; SSM allowance to 60% for <=6 min aggregate per 60 min for both tiers, as established under HAR Sec. 11-60.1-32(a)(1)-(2) (pre-3/21/1972: 40%, SSM 60% <=6 min/hr) and Sec. 11-60.1-32(b)(1)-(2) (post-3/20/1972: 20%, same SSM allowance).

Compliance is demonstrated via EPA Method 9; CAB conducts smoke school / visible emissions certification training.

Averaging period: SSM: 60% for periods aggregating <=6 min per 60 min; Method 9 per subsection (c); uncombined water exempt per (d)

Hawaii CAB operates a smoke school program and certifies visible emissions observers. Permits specify 6-minute averages using Method 9. Fugitive emissions limits also apply at property line.

Last verified July 8, 2026

Note: Regulations change — always verify current requirements with your state's air quality agency before making compliance decisions. This page is for informational purposes and is not legal advice; consult a qualified attorney or environmental compliance professional for guidance specific to your facility.