DRAFT Final Report ACWA-08-05
8 October 2008
Figure 4.
Fecal coliform bacteria concentrations at the three sites on the Nushagak River: a) near Koliganek, b)
near the mouth of the Mulchatna River, and c) near New Stuyahok. FC concentrations from three upstream
samples (affected bank, mid-channel and unaffected bank) were averaged and the mid-channel and unaffected
bank samples were averaged for the across channel sites.
Table 2.
Fecal coliform bacteria concentrations in fc/100ml by site as compared to upriver and cross channel
control sites. The affected bank site is directly downriver from a potential input of fecal coliform. Upstream sites
are upriver of the potential input; across channel sites are across the channel from potential inputs.
Sample date
21 Aug
6 Sept
2 Oct
14 May
10 June
Location
2007
2007
2007
2008
2008
Mean
25.7
20.3
3.7
64.0
13.7
25.5
Koliganek Upstream (mean)
13.0
12.0
3.0
36.0
24.0
17.6
Koliganek Affected Bank
20.0
16.5
2.5
58.5
13.5
22.2
Koliganek Across Channel (mean)
18.7
18.3
5.0
54.7
17.3
22.8
Mulchatna Upstream (mean)
34.0
9.0
16.0
50.0
6.0
23.0
Mulchatna Affected Bank
15.5
21.0
3.5
55.5
14.5
22.0
Mulchatna Across Channel (mean)
9.4
16.0
13.3
56.7
17.0
22.5
New Stuyahok Upstream (mean)
5.4
17.0
7.0
69.0
12.0
22.1
New Stuyahok Affected Bank
New Stuyahok Across Channel
8.0
13.5
10.0
57.0
12.5
20.2
(mean)
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