Table 7-5

Home About Us Our Policies Darby Subwatersheds Landowner Information Search Our Site Comments

Back Up Next

Table 7-5:

Warmwater habitat outside mixing zone 30-day average total ammonia-nitrogen criteria (mg/l).

The following criteria apply during the months of December to February:

pH 6.5 6.7 6.9 7.0 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8.0 8.1 8.2 8.3 8.4 8.5 8.6 8.8 9.0
Temp(0C)                                            
0-10 13.0 13.0 13.0 12.6 11.7 10.7 9.7 8.6 7.6 6.6 5.6 4.8 4.0 3.3 2.8 2.3 1.9 1.5 1.2 1.0 0.7 0.5
11 13.0 13.0 12.4 11.6 10.8 9.9 8.9 8.0 7.0 6.1 5.2 4.4 3.7 3.1 2.6 2.1 1.7 1.4 1.2 0.9 0.6 0.4
12 13.0 12.6 11.5 10.8 10.0 9.2 8.3 7.4 6.5 5.6 4.8 4.1 3.4 2.9 2.4 2.0 1.6 1.3 1.1 0.9 0.6 0.4
13 12.3 11.6 10.6 10.0 9.2 8.5 7.7 6.8 6.0 5.2 4.5 3.8 3.2 2.7 2.2 1.8 1.5 1.2 1.0 0.8 0.6 0.4
14 11.4 10.8 9.8 9.3 8.6 7.9 7.1 6.3 5.6 4.8 4.2 3.5 3.0 2.5 2.1 1.7 1.4 1.1 0.9 0.8 0.5 0.4
15 10.6 10.0 9.1 8.6 8.0 7.3 6.6 5.9 5.2 4.5 3.9 3.3 2.8 2.3 1.9 1.6 1.3 1.1 0.9 0.7 0.5 0.3
16 9.8 9.3 8.5 8.0 7.4 6.8 6.1 5.5 4.8 4.2 3.6 3.0 2.6 2.1 1.8 1.5 1.2 1.0 0.8 0.7 0.5 0.3
17 9.1 8.6 7.8 7.4 6.8 6.3 5.7 5.1 4.5 3.9 3.3 2.8 2.4 2.0 1.7 1.4 1.1 0.9 0.8 0.6 0.4 0.3
18 8.5 8.0 7.3 6.9 6.4 5.8 5.3 4.7 4.2 3.6 3.1 2.6 2.2 1.8 1.5 1.3 1.1 0.9 0.7 0.6 0.4 0.3
19 7.9 7.4 6.8 6.4 5.9 5.4 4.9 4.4 3.9 3.3 2.9 2.4 2.1 1.7 1.4 1.2 1.0 0.8 0.7 0.5 0.4 0.3
20 7.3 6.9 6.3 5.9 5.5 5.0 4.6 4.1 3.6 3.1 2.7 2.3 1.9 1.6 1.3 1.1 0.9 0.8 0.6 0.5 0.4 0.3

The following criteria apply during the months of March to November:

pH 6.5 6.7 6.9 7.0 7.1 7.2 7.3 7.4 7.5 7.6 7.7 7.8 7.9 8.0 8.1 8.2 8.3 8.4 8.5 8.6 8.8 9.0
Temp(0C)                                            
10 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.0 1.7 1.4 1.1 0.9 0.7 0.6 0.5 0.4 0.2 0.2
11 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.0 1.7 1.4 1.1 0.9 0.7 0.6 0.5 0.4 0.2 0.2
12 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.0 1.7 1.4 1.1 0.9 0.7 0.6 0.5 0.4 0.2 0.2
13 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 1.9 1.6 1.4 1.1 0.9 0.7 0.6 0.5 0.4 0.2 0.2
14 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 2.3 1.9 1.6 1.4 1.1 0.9 0.7 0.6 0.5 0.4 0.2 0.2
15 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 1.9 1.6 1.4 1.1 0.9 0.7 0.6 0.5 0.4 0.2 0.2
16 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 1.9 1.6 1.4 1.1 0.9 0.7 0.6 0.5 0.4 0.2 0.2
17 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 1.9 1.6 1.4 1.1 0.9 0.7 0.6 0.5 0.4 0.3 0.2
18 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 1.9 1.6 1.4 1.1 0.9 0.7 0.6 0.5 0.4 0.3 0.2
19 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 1.9 1.6 1.4 1.1 0.9 0.7 0.6 0.5 0.4 0.3 0.2
20 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 2.2 1.9 1.6 1.4 1.1 0.9 0.7 0.6 0.5 0.4 0.3 0.2
21 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.1 1.8 1.5 1.3 1.0 0.8 0.7 0.5 0.4 0.4 0.2 0.2
22 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.9 1.6 1.4 1.2 0.9 0.8 0.6 0.5 0.4 0.3 0.2 0.2
23 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.8 1.5 1.3 1.1 0.9 0.7 0.6 0.5 0.4 0.3 0.2 0.2
24 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.7 1.4 1.2 1.0 0.8 0.7 0.5 0.4 0.4 0.3 0.2 0.1
25 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.6 1.3 1.1 1.0 0.8 0.6 0.5 0.4 0.3 0.3 0.2 0.1
26 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.2 1.1 0.9 0.7 0.6 0.5 0.4 0.3 0.3 0.2 0.1
27 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.2 1.0 0.8 0.7 0.5 0.4 0.4 0.3 0.2 0.2 0.1
28 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.3 1.1 0.9 0.8 0.6 0.5 0.4 0.3 0.3 0.2 0.2 0.1
29 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.0 0.9 0.7 0.6 0.5 0.4 0.3 0.3 0.2 0.2 0.1
30 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.1 1.0 0.8 0.7 0.6 0.5 0.4 0.3 0.3 0.2 0.2 0.1

 Back Up Next

All information found on this website is for informational purposes only by the Darby Joint Board of Supervisors. All text, images, logos and information contained on this website are property of the Joint Board and they may not be used or reproduced without permission of the Joint Board. 
For problems or questions regarding this website please contact the Darby Watershed Coordinator.
Last updated: August 18, 2008.