TITLE 35: ENVIRONMENTAL PROTECTION
SUBTITLE E: AGRICULTURE RELATED POLLUTION
CHAPTER I: POLLUTION CONTROL BOARD
PART 501 GENERAL PROVISIONS
SECTION 501.390 25-YEAR, 24-HOUR PRECIPITATION EVENT


 

Section 501.390  25-Year, 24-Hour Precipitation Event

 

The maximum 24-hour precipitation event with a probable recurrence interval of once in 25 years, as defined by NOAA Atlas 14; Precipitation Frequency Atlas of the United States, incorporated by reference in Section 501.200. 

 

(Source:  Added at 38 Ill. Reg. 17661, effective August 11, 2014)