Genesee County Health Department
Better Life Through Better Health

Date:                    September 17, 2009

Release Date:       For Immediate Release         End Date: September 21, 2009   

Contact Person:   Brian McKenzie, R.S.
                           Environmental Health Supervisor
                           Genesee County Health Department

 

Phone:                 (810) 257-3603        

RE:                      E. Coli Bacteria Results For Genesee County Lakes

 

Due to elevated E. coli bacteria levels the Genesee County Health Department continues to advise against total body contact (swimming) at:

  • LAKE FENTON - TOWNSHIP HALL BEACH

All other monitoring points in Genesee County are currently in compliance with State guidelines for bacterial concentrations at bathing beaches.

 

Exposure to any recreational water can be a potential health risk.  Gastrointestinal and dermatological illnesses have been associated with recreational water exposure. Rain and subsequent runoff can dramatically increase E. coli bacteria levels in lakes and other surface waters. Therefore, the Genesee County Health Department is advising that all beach patrons exercise due caution with total body contact in area surface waters after rain events.

 

Your Genesee County Health Department utilizes the following rules to interpret the E. coli test results. (By authority conferred on the director of public health by section 12544 of Act No. 368 of the Public Acts of 1978, as amended, being §333.12544 of the Michigan Compiled Laws):

 

R 325.2102 Sanitation and safety determinations.  Rule 2. (1) Bacterial concentrations in water at a bathing beach, as determined by standard methods, shall contain not more than 130 Escherichia coli (E. coli) per 100 milliliters, as a 30-day geometric mean. Compliance shall be based on the geometric mean of all individual samples taken during 5 or more sampling events representatively spread over a 30-day period. Each sampling event shall consist of 3 or more samples taken at representative locations within a designated sampling area. Bathing beach waters shall not contain more than a maximum of 300 E. coli per 100 milliliters. Compliance shall be based on the geometric mean of 3 or more samples taken during the same sampling event at representative locations within a defined sampling area.    

This is the final beach report for the 2009 season. Sampling will resume in early May 2010.

2009 Bacterial Concentrations of Escherichia coli per 100 milliliters

         

LOCATIONS:

*Wk of 5/11

*Wk of 5/18

*Wk of 5/25

*Wk of 6/1

*Wk of 6/8

*Wk of 6/15

*Wk of 6/22

*Wk of 6/29

*Wk of 7/6

*Wk of 7/13

*Wk of 7/20

*Wk of 7/27

*Wk of 8/3

*Wk of 8/10

*Wk of 8/17

*Wk of 8/24

*Wk of 8/31

*Wk of 9/07

 *Wk of 9/14

**30 Day Mean 

Byram Lk. Clover Beach

1

2

3

2

9

6

29

5

20

12

5

2

3

*364

*342

*547

23

15

43

97

Covenant Hills Camp

5

7

11

6

172

16

29

69

41

37

*422

*395

64

117

*613

13

9

19

5

24

Copneconic Camp Beach

7

2

1

1

1

2

36

3

5

4

14

12

4

21

16

7

1

3

19

6

Copneconic Day Beach

6

2

1

1

1

2

227

2

4

9

7

5

29

15

5

7

1

2

298

14

Dollar Lake

11

2

5

2

105

8

22

3

113

19

27

15

17

111

13

4

9

15

13

10

Lk Fenton Twp Hall/Beach

1

1

2

32

8

10

260

13

8

35

6

40

44

63

193

*1428

*568

195

40

**319

Griswold Park

40

8

10

20

64

10

98

15

1

232

149

232

50

96

*629

20

31

81

28

62

Hasler Lake Campground

3

32

4

27

60

1

22

3

1

2

6

2

7

35

2

4

2

1

36

3

Holloway-Buttercup Beach

3

1

1

1

153

3

8

2

2

3

3

12

4

22

9

6

15

21

8

11

Kelly Lake

7

5

3

26

173

51

298*

183

82

55

*479

157

77

36

137

88

10

65

279

110

Lake Linda

2

1

24

7

42

18

193

62

12

24

71

6

2

60

48

9

4

8

63

16

Mott Lake - Bluebell Beach

29

16

23

25

49

1

77

11

70

4

47

83

8

28

169

41

96

64

20

61

Myers Lake

1

2

1

3

1

5

9

6

4

2

2

10

6

5

4

1

9

1

1

2

Pinewood Lake

2

11

11

10

137

23

39

25

20

35

50

15

228

79

45

42

2

1

10

9

Silver Lake Beach/City Pk

12

25

4

4

61

8

15

8

1

17

259

212

8

42

39

12

15

1

173

24

West Sister Lake

1

1

2

1

19

2

1

2

2

3

2

19

4

5

22

2

3

3

3

4
 

 * Not to Exceed State guideline of 300 E. coli per 100 ml

** Not to Exceed State guideline of 130 E. coli per 100 ml