Illinois Administrative Code
Title 35 - ENVIRONMENTAL PROTECTION
Part 302 - WATER QUALITY STANDARDS
Appendix C - Maximum total ammonia nitrogen concentrations allowable for certain combinations of pH and temperature
Table C - Temperature and pH-Dependent Values of the CS (Chronic Standard) for Fish Early Life Stages Present
|
pH |
Temperature, °Celsius |
|||||||||
|
0 |
14 |
16 |
18 |
20 |
22 |
24 |
26 |
28 |
30 |
|
|
6 |
6.95 |
6.95 |
6.32 |
5.55 |
4.88 |
4.29 |
3.77 |
3.31 |
2.91 |
2.56 |
|
6.1 |
6.91 |
6.91 |
6.28 |
5.52 |
4.86 |
4.27 |
3.75 |
3.30 |
2.90 |
2.55 |
|
6.2 |
6.87 |
6.87 |
6.24 |
5.49 |
4.82 |
4.24 |
3.73 |
3.28 |
2.88 |
2.53 |
|
6.3 |
6.82 |
6.82 |
6.19 |
5.45 |
4.79 |
4.21 |
3.70 |
3.25 |
2.86 |
2.51 |
|
6.4 |
6.75 |
6.75 |
6.13 |
5.39 |
4.74 |
4.17 |
3.66 |
3.22 |
2.83 |
2.49 |
|
6.5 |
6.67 |
6.67 |
6.06 |
5.33 |
4.68 |
4.12 |
3.62 |
3.18 |
2.80 |
2.46 |
|
6.6 |
6.57 |
6.57 |
5.97 |
5.25 |
4.61 |
4.05 |
3.56 |
3.13 |
2.75 |
2.42 |
|
6.7 |
6.44 |
6.44 |
5.86 |
5.15 |
4.52 |
3.98 |
3.50 |
3.07 |
2.70 |
2.37 |
|
6.8 |
6.29 |
6.29 |
5.72 |
5.03 |
4.42 |
3.89 |
3.42 |
3.00 |
2.64 |
2.32 |
|
6.9 |
6.12 |
6.12 |
5.56 |
4.89 |
4.30 |
3.78 |
3.32 |
2.92 |
2.57 |
2.35 |
|
7 |
5.91 |
5.91 |
5.37 |
4.72 |
4.15 |
3.65 |
3.21 |
2.82 |
2.48 |
2.18 |
|
7.1 |
5.67 |
5.67 |
5.15 |
4.53 |
3.98 |
3.50 |
3.08 |
2.70 |
2.38 |
2.09 |
|
7.2 |
5.39 |
5.39 |
4.90 |
4.31 |
3.78 |
3.33 |
2.92 |
2.57 |
2.26 |
1.99 |
|
7.3 |
5.08 |
5.08 |
4.61 |
4.06 |
3.57 |
3.13 |
2.76 |
2.42 |
2.13 |
1.87 |
|
7.4 |
4.73 |
4.73 |
4.30 |
3.78 |
3.32 |
2.92 |
2.57 |
2.26 |
1.98 |
1.74 |
|
7.5 |
4.36 |
4.36 |
3.97 |
3.49 |
3.06 |
2.69 |
2.37 |
2.08 |
1.83 |
1.61 |
|
7.6 |
3.98 |
3.98 |
3.61 |
3.18 |
2.79 |
2.45 |
2.16 |
1.90 |
1.67 |
1.47 |
|
7.7 |
3.58 |
3.58 |
3.25 |
2.86 |
2.51 |
2.21 |
1.94 |
1.71 |
1.50 |
1.32 |
|
7.8 |
3.18 |
3.18 |
2.89 |
2.54 |
2.23 |
1.96 |
1.73 |
1.52 |
1.33 |
1.17 |
|
7.9 |
2.80 |
2.80 |
2.54 |
2.24 |
1.96 |
1.73 |
1.52 |
1.33 |
1.17 |
1.03 |
|
8 |
2.43 |
2.43 |
2.21 |
1.94 |
1.71 |
1.50 |
1.32 |
1.16 |
1.02 |
0.90 |
|
8.1 |
2.10 |
2.10 |
1.91 |
1.68 |
1.47 |
1.29 |
1.14 |
1.00 |
0.88 |
0.77 |
|
8.2 |
1.79 |
1.79 |
1.63 |
1.43 |
1.26 |
1.11 |
0.97 |
0.86 |
0.75 |
0.66 |
|
8.3 |
1.52 |
1.52 |
1.39 |
1.22 |
1.07 |
0.94 |
0.83 |
0.73 |
0.64 |
0.56 |
|
8.4 |
1.29 |
1.29 |
1.17 |
1.03 |
0.91 |
0.80 |
0.70 |
0.62 |
0.54 |
0.48 |
|
8.5 |
1.09 |
1.09 |
0.99 |
0.87 |
0.76 |
0.67 |
0.59 |
0.52 |
0.46 |
0.40 |
|
8.6 |
0.92 |
0.92 |
0.84 |
0.73 |
0.65 |
0.57 |
0.50 |
0.44 |
0.39 |
0.34 |
|
8.7 |
0.78 |
0.78 |
0.71 |
0.62 |
0.55 |
0.48 |
0.42 |
0.37 |
0.33 |
0.29 |
|
8.8 |
0.66 |
0.66 |
0.60 |
0.53 |
0.46 |
0.41 |
0.36 |
0.32 |
0.28 |
0.24 |
|
8.9 |
0.56 |
0.56 |
0.51 |
0.45 |
0.40 |
0.35 |
0.31 |
0.27 |
0.24 |
0.21 |
|
9 |
0.49 |
0.49 |
0.44 |
0.39 |
0.34 |
0.30 |
0.26 |
0.23 |
0.20 |
0.18 |
