Genesee County Health Department
Better Life Through Better Health

Date:                    September 2, 2010

Release Date:       For Immediate Release         End Date: September 6, 2010   

Contact Person:    Brian McKenzie
                           Environmental Health Supervisor
                           Genesee County Health Department

 

Phone:                 (810) 257-3603        

RE:                      E. Coli Bacteria Results For Genesee County Lakes

     The E-coli bacteria results have returned to acceptable levels at the Lake Fenton Township Hall Beach.  All monitoring points in Genesee County are now 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.    

2010 Bacterial Concentrations of Escherichia coli per 100 milliliters

         

LOCATIONS:

*Wk of 5/17

*Wk of 5/24

*Wk of 5/31

*Wk of 6/7

*Wk of 6/14

*Wk of 6/21

*Wk of 6/28

*Wk of 7/5

*Wk of 7/12

*Wk of 7/19

*Wk of 7/26

*Wk of 8/2

*Wk of 8/9

*Wk of 8/16

*Wk of 8/23

*Wk of 8/30

*Wk of 9/6

*Wk of 9/13

 *Wk of 9/20

**30 Day Mean 

Byram Lk. Clover Beach

 6 7 2 58 21 17 260 51 163 23 9 43 125 140 10 139       63

Covenant Hills Camp

 45 20 13 28 23 14 139 25 11 7 6 7 3 3 4 7       4

Copneconic Camp Beach

 10 2 1 2 1 2 2 1 3 3 2 2 1 1 2 14       2

Copneconic Day Beach

 5 16 1 1 1 2 2 2 6 3 10 2 2 1 2 68       3

Lk Fenton Twp Hall/Beach

 2 3 5 9 4 10 13 76 39 47 166 *482 139 159 22 20       118

Griswold Park

 3 20 28 20 11 28 137 38 83 43 10 171 17 57 30 29       54

Hasler Lake Campground

 20 42 3 9 8 2 5 7 31 8 3 3 1 1 4 3       2

Holloway-Buttercup Beach

 65 4 6 10 4 30 5 *463 121 35 27 127 16 298 11 43       58

Kelly Lake

 76 67 10 31 28 39 124 75 186 23 25 57 7 69 15 18       23

Lake Linda

 1 6 19 4 27 41 256 1 78 3 27 16 33 24 9 11       17

Mott Lake - Bluebell Beach

 133 6 36 3 9 12 39 220 32 153 31 241 51 34 23 82        60

Myers Lake

 2 9 3 15 9 2 8 6 7 4 3 7 3 7 1 2       3

Pinewood Lake

 44 10 64 100 6 12 282 *380 *380 91 5 23 243 97 4 22        34

Silver Lake Beach/City Pk

 36 7 4 4 7 14 3 58 282 6 7 15 33 24 245 21       36

West Sister Lake

 2 1 2 2 1 2 48 8 12 3 6 1 1 1 7 3       2
 

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

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