Health and Safety Code section 41701

Except as otherwise provided in Section 41704, or Article 2 (commencing with Section 41800) of this chapter other than Section 41812, or Article 2 (commencing with Section 42350) of Chapter 4, no person shall discharge into the atmosphere from any source whatsoever any air contaminant, other than uncombined water vapor, for a period or periods aggregating more than three minutes in any one hour which is:

(a)

As dark or darker in shade as that designated as No. 2 on the Ringelmann Chart, as published by the United States Bureau of Mines, or

(b)

Of such opacity as to obscure an observer’s view to a degree equal to or greater than does smoke described in subdivision (a).

Source: Section 41701, https://leginfo.­legislature.­ca.­gov/faces/codes_displaySection.­xhtml?lawCode=HSC§ionNum=41701.­ (updated Jan. 1, 1977; accessed Jun. 25, 2025).

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Verified:
Jun. 25, 2025

§ 41701's source at ca​.gov