2015 E-coli Bacteria Counts at the Geneva Lake, WI Municipal Beaches


 E. coli Counts (MPN 100mL-1) at City of Lake Geneva Public Beach;
Geneva Lake, Walworth County, WI; 2015.

Lake Geneva 5/20 5/27 6/1 6/8 6/15 Avg  
First
Period
LG 1 West End 0 53.8 0 23 7.2 16.8
LG 2 Swim Pier 0 44.1 4.1 12 18.7 15.8
LG 3 East End 4.1 62 4.1 18 60.9 29.8
  Rain within 24 hrs (in) 0 0.66 0.00 0.00 1.49 0.4
  Lake Geneva 6/23 7/1 7/6 7/13 7/20 Avg Re-sample 7/7
Second
Period
LG 1 West End 14.5 120 435.2 133.4 13 143.2 LG1 37
LG 2 Swim Pier 16.1 46 365 82 123 126.4 LG2 20
LG 3 East End 27.3 29 172 136.3 68 86.5 LG3 20
  Rain within 24 hrs (in) 0.02 0.00 0.12 0.59 0.00 0.1
Lake Geneva 7/27 8/3 8/10 8/17 8/24 8/31 Avg Re-sample 8/4
Final
Period
LG 1 West End 8 >2419 15 5 3 17 9.6 LG1 127
LG 2 Swim Pier 24 195 197 21 3.1 20 76.7
LG 3 East End 19 91 93 138 2 54 66.2
  Rain within 24 hrs (in) 0.00 0.28 0.00 0.00 0.05 0.00
Source: GLEA & Genoa City Wastewater Lab NC =  No sample collected 235=Exceed advisory criteria 1000=Exceed closing criteria


E. coli Counts (MPN 100mL-1) at Village of Fontana-on-Geneva Public Beaches;
Geneva Lake, WI  2015
  Fontana 5/20 5/27 6/1 6/8 6/15 Avg
First
Period
F1 North End 1 26 8 4 344 77
F2 Guard Stand 1 4 2 1 51 12
F3 South End < 1 11 2 2 119 34
F4 Abbey/Channel Mix 5 32 6 11 488 108
F5 Beach S. Chnl 5 14 1 4 308 66
  Rain within 24 hrs (in) 0.00 0.66 0.00 0.00 1.23
  Fontana 6/23 7/1 7/6 7/13 7/20 Avg
Second
Period
F1 North End 4 3 < 1 32 NA 13
F2 Guard Stand 4 26 13 40 NA 21
F3 Swim Pier 4 44 4 21 13 17
F4 Abbey/Channel Mix 37 16 15 47 75 38
F5 South beach 8 11 1 84 10 23
  Rain within 24 hrs (in) 0.29 0.00 0.00 0.59 0.00
  Fontana 7/27 8/3 8/10 8/17 8/24 8/31 Avg
Final
Period
F1 North End 1 36 12 10 23 17 17
F2 Guard Stand 70 29 8 12 38 20 30
F3 Swim Pier 27 27 12 19 96 54 39
F4 Abbey/Channel Mix 18 20 11 59 24 69 34
F5 South beach 5 5 1 5 14 4 6
  Rain within 24 hrs (in) 0.00 0.28 0.00 0.00 0.05 0.00
Source: GLEA & SLH 235=Exceed advisory criteria 1000=Exceed Closing Criteria


E. coli Counts (MPN 100mL-1) at Williams Bay Public Beaches;
Geneva Lake, Walworth County, WI; 2015
  Williams Bay 5/20 5/27 6/1/15 6/8 6/15 Avg
First
Period
WB1 West End 46 28 8 invalid 86 42
WB2 Swim Pier 56 24 10 17 2420 505
WB3 Creek/Lake Mix 10 101 7 56 >2420 44
WB4 East of Creek 5 40 3 invalid 1120 292
  Rain within 24 hrs (in) 0.00 0.66 0.00 0.00 1.21
  Williams Bay 6/23 7/1 7/6 7/13 7/20 Avg
Second
Period
WB1 West End 10 2 17 131 21 36
WB2 Swim Pier 16 5 11 146 18 39
WB3 Lake Creek Mix 80 10 3 21 34 30
WB4 East of Creek 19  < 1 5 6 18 12
  Rain within 24 hrs(in) 0.31 0.00 0.00 0.59 0.00
  Williams Bay 7/27 8/3 8/10 8/17 8/24 8/31 Avg
Final
Period
WB1 West End 10 9 7 8 5 24 11
WB2 Swim Pier 5 5 4 7 9 12 7
WB3 Creek/Lake Mix 3 14 11 12 8 10 10
WB4 East of Creek 20 6 12 9 3 16 11
  Rain within 24 hrs (in) 0.00 0.28 0.00 0.00 0.05 0.00
Source: GLEA & SLH 235 =Exceed advisory criteria 1000=Exceed Closing Criteria
NOTE: on June 15th the levels exceeded the criteria. The levels were high most likely because of heavy rain flushing out organic matter with in the wetland that feeds into the lake.  


E. coli Counts (MPN 100mL-1) at Town of Linn Public Beaches; Geneva Lake,
Walworth County, WI; 2015
  Linn Pier 5/20/15 5/27/15 6/1/15 6/8/15 6/15/15 Avg
First
Period
LP1 Beach 1 2 3 < 1 126 33
Robinson Hillside 5/20/15 5/27/15 6/1/15 6/8/15 6/15/15 Avg
HR1 Hillside Creek 21 43 122 77 >2420 66
HR2 Lake/Creek Mix < 1 29 48 4 579 165
HR3 Hillside Beach < 1 28 17 1 365 103
Rain within 24 hrs (in) 0.00 0.66 0.00 0.00 1.20
  Linn Pier 6/23/15 7/1/15 7/6/15 7/13/15 7/20/15 Avg
Second
Period
LP1 Beach 6 12 6 22 0 9
Robinson Hillside 6/23/15 7/1/15 7/6/15 7/13/15 7/20/15 Avg
HR1 Hillside Creek 214 345 770 >2420 816 536
HR2 Lake/Creek Mix 6 14 62 140 50 54
HR3 Hillside Beach 9 8 16 313 21 73
Rain within 24 hrs(in) 0.14 0.00 0.12 0.59 0.00
  Linn Pier 7/27/15 8/3/15 8/10/15 8/17/15 8/24/15 8/31/15 Avg
Final
Period
LP1 Beach 3 7 1 3 5 9 5
Robinson Hillside 7/27/15 8/3/15 8/10/15 8/17/15 8/24/15 8/31/15 Avg
HR1 Hillside Creek 238 1414 172 250 261 517 475
HR2 Lake Creek Mix 4 91 9 3 6 26 23
HR3 Hillside Beach 4 11 2 7 6 6 6
Rain within 24 hrs (in) 0.00 0.28 0.00 0.00 0.05 0.00
Source: GLEA & SLH 235=Exceed advisory criteria 1000=Exceed Closing Criteria