TITLE 35: ENVIRONMENTAL PROTECTION
SUBTITLE C: WATER POLLUTION
CHAPTER I: POLLUTION CONTROL BOARD
PART 303 WATER USE DESIGNATIONS AND SITE-SPECIFIC WATER QUALITY STANDARDS
SECTION 303.311 OHIO RIVER TEMPERATURE

 

Section 303.311  Ohio River Temperature

 

Instead of the standards of 35 Ill. Adm. Code 302.211(e) the water temperature at representative locations in the main river of the Ohio River must not exceed the maximum limits in the following table during more than 1% of the hours in the 12-month period ending with any month.  The water temperature at these locations must not at any time exceed the maximum limits in the following table by more than 1.7 ºC (3 ºF).

 

 

ºC

ºF

 

 

ºC

ºF

JAN.

10

50

 

JUL.

32

89

FEB.

10

50

 

AUG.

32

89

MAR.

16

60

 

SEPT.

31

87

APR.

21

70

 

OCT.

26

78

MAY

27

80

 

NOV.

21

70

JUN.

31

87

 

DEC.

14

57

 

(Source:  Amended at 47 Ill. Reg. 4575, effective March 23, 2023)