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. Author manuscript; available in PMC: 2022 May 1.
Published in final edited form as: J Microbiol Methods. 2021 Mar 22;184:106186. doi: 10.1016/j.mimet.2021.106186

Table 3.

Theoretical site-specific relationships between Method C and culture method results.

Site ID Waterbody N Samples Intercept Slope RSQa Mean Method C value @ 300 b
Ross Ross Lake 75 −0.391 0.847 0.768 1.706
Singing Bridge Lake Huron (Saginaw Bay) 74 0.305 0.483 0.696 1.502
Orchard Lake Michigan 13 −0.011 0.691 0.777 1.700
Hoffmaster Campground Lake Michigan 34 −0.371 0.888 0.839 1.830
Meinert Lake Michigan 65 −0.017 0.687 0.839 1.685
New Buffalo Lake Michigan 48 0.248 0.519 0.685 1.535
Warren Lake Michigan 55 0.105 0.600 0.754 1.593
Brimley Lake Superior 39 −0.094 0.731 0.660 1.717
Sherman Lake Superior 32 −0.360 0.922 0.758 1.925
1 Adams Lake 32 0.094 0.859 0.663 2.221
11 Chalmers Lake 51 −0.071 0.928 0.644 2.226
114 Orion Lake 51 −0.320 1.054 0.774 2.291
131 Walled Lake 53 −0.024 0.716 0.704 1.749
137 Cass Lake 43 0.006 0.788 0.613 1.958
140 Orchard Lake 70 −0.074 0.877 0.650 2.098
167 Handsome Lake 37 0.033 0.871 0.665 2.191
169 Long Lake 57 −0.110 0.813 0.839 1.905
190 Tipsico Lake 58 −0.257 0.990 0.940 2.196
207 Walled Lake 65 −0.031 0.681 0.634 1.656
209 Cass Lake 50 −0.033 0.821 0.661 2.000
214 Eagle Lake 69 0.162 0.746 0.646 2.009
268 Woodhull Lake 81 −0.221 1.005 0.741 2.268
291 Scotch Lake 31 −0.010 0.827 0.687 2.040
339 Wolverine Lake 52 −0.368 0.931 0.624 1.939
38 Commerce Lake 26 −0.278 1.014 0.837 2.234
64 Stewart Lake 20 0.079 0.741 0.610 1.915
74 Duck Lake 54 −0.069 0.929 0.610 2.232
87 Big Seven Lake 63 −0.038 0.757 0.636 1.838
Holland Lake Huron 189 0.098 0.634 0.659 1.668
Memorial Lake St. Clair 78 0.277 0.529 0.645 1.588
Metro Lake St. Clair 139 0.013 0.671 0.767 1.676
New Baltimore Lake St. Clair 63 −0.172 0.607 0.685 1.331
Bay City Lake Huron (Saginaw Bay) 31 0.265 0.700 0.786 1.998
Bird Creek Lake Huron 50 −0.053 0.705 0.753 1.695
Brissette Lake Huron (Saginaw Bay) 19 −0.037 0.706 0.738 1.713
East Tawas Lake Huron (Tawas Bay) 19 −0.355 0.876 0.904 1.816
Gateway Lake Huron (Tawas Bay) 36 0.224 0.577 0.663 1.655
Linwood Lake Huron (Saginaw Bay) 60 0.228 0.608 0.674 1.735
VanEttan Van Ettan Lake 10 −0.277 0.761 0.872 1.609
a

Peason R-squared

b

Mean Method C log10 copies/reaction estimate corresponding to 300 culturable E. coli / 100 mL from simple linear regression analysis