SUBTITLE C: WATER POLLUTION
CHAPTER I: POLLUTION CONTROL BOARD
PART 303 WATER USE DESIGNATIONS AND SITE SPECIFIC WATER QUALITY STANDARDS
SECTION 303.351 MISSISSIPPI RIVER SOUTH CENTRAL TEMPERATURE
Section 303.351 Mississippi River South Central Temperature
Instead of the standards of Section 302.211(e), the water temperature at representative locations in the main river of the Mississippi River in the indicated locations shall not exceed the maximum limits in the following tables during more than 1% of the hours in the twelve month period ending with any month. Moreover, at no time shall the water temperature at such locations exceed the maximum limits in the following table by more than 1.7° C (3° F).
a) In the Mississippi River from the Illinois River to Alton Lock and Dam:
|
|
° C |
° F |
|
|
° C |
° F |
|
JAN. |
7 |
45 |
|
JUL. |
31 |
88 |
|
FEB. |
7 |
45 |
|
AUG. |
31 |
88 |
|
MAR. |
14 |
57 |
|
SEPT. |
29 |
86 |
|
APR. |
20 |
68 |
|
OCT. |
24 |
75 |
|
MAY |
26 |
78 |
|
NOV. |
18 |
65 |
|
JUN. |
30 |
86 |
|
DEC. |
11 |
52 |
b) In the Mississippi River from Alton Lock and Dam to the Kaskaskia River:
|
|
° C |
° F |
|
|
° C |
° F |
|
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 |