Water Quality of Local Lakes

    During the summer months, Public Health and Human Services employees collect water samples from local natural bathing beaches. Our lab analyzes the water for E. coli.

    Official EPA Criteria for Freshwater Bathing (Full Body Contact) Recreational Water:
    Based on a statistically sufficient number of samples (generally not less than 5 samples equally spaced over a 30-day period), the geometric mean of the indicated bacterial densities should not exceed 126 per 100 ml (E.coli).

    Water Analysis 2015
    measured in E.coli parts per 100 ml

    Water Analysis 2016
    measured in E.coli parts per 100 ml

    Water Analysis 2017

     
    May
    June
    July Aug. Sept.
     
    Test Date
    Result (per 100ml)
    Test Date
    Result 
    (per 100ml)
    Test
    Date
    Result 
    (per 100ml)
    Test Date
    Result (per 100ml)
    Test Date
    Result 
    (per 100ml)
    Cedar Lake 5/30  178.9 6/5  28.1 7/11  21.6 8/14  25.6    
    Lake Cyrene
    5/31  6.3 6/26   57.3 7/11  30.5 8/8  4.1    
    Fairview Lake
    5/31   11.9         8/14  5.2    
    Hillcreek Lake
    5/30  9.7 6/5  12.0 7/12  9.8 8/7  1.0    
    Hinkson Creek at Capen Park
    5/31  275.5 6/7
    6/26
    48
    39.9
    7/10  51.2 8/8  23.8    
    W. Hulen Lake 5/31  142.1 6/6 37.9 7/10 6.3 8/14  1.0    
    E. Hulen Lake
    5/31  26.9 6/8  91.1 7/10  2.0 8/14 9.7    
    Katy Lake
    5/30  6.3 6/8  9.7 7/11  <1.0 8/14  2.0    
    Nifong Lake 5/31  8.4 6/21  17.1 7/17  1.0  8/2 <1.0    
    Phillips Lake 5/31  2.0 6/21  1.0 7/17  <1.0  8/2 <1.0    
    Queen Ann Lake
    5/31  27.2 6/26  2.0 7/10  9.7 8/8  8.4    
    Shalimar Gardens 5/30  68.9     7/20 42.6 8/8  23.1    
    Twin Lakes (boating area) 5/31  5.2 6/21   6.3 7/17  4.1  8/2 1.0    
    Woodrail Lake
    5/30  1.0 6/8 1.0 7/10  1.0 8/14  1.0    

    Weekly Samples and Resamples

     
    May
    June July Aug. Sept.
      Test Date Result 
    (per 100ml)
    Test Date Result 
    (per 100ml)
    Test Date Result 
    (per 100ml)
    Test Date Result 
    (per 100ml)
    Test Date Result 
    (per 100ml)
    Stephen’s Lake

    5/30

    3.1

    6/6
    6/13
    6/20
    6/26

    8.1
    8.6
    5.2
    1.0

    7/3 
    7/11
    7/18
    7/25

     <1.0
    3.1
    1.0
    1.0

    8/1
    8/8
    8/15
    8/23 
    8/30

    3
    <1.0
    3.1
    1.0
    1.0
       
    Flat Branch Park Creek

    5/30

    46.4

    6/6
    6/13
    6/20 
    6/26

    648.8
    147
    100.6
    31.7

    7/3
    7/11
    7/18
    7/25 

     20.9
    727
    91.2
    1119.9
    8/1 
    8/8
    8/15
    8/23
    8/30
    113.7
    67
    64.5
    5.2
    16.9
       
    Flat Branch at Stadium

    5/30

    547.5

    6/6
    6/13
    6/20
    6/26 

    42
    547.5
    866.4
    238.2

    7/3 
    7/11
    7/18
    7/25
    547.5
    517.2
    116.9
    86.1
    8/1
    8/8
    8/15
    8/23
    8/30
    214.2
    183.7
    235.9
    920.8
    290.9
       

    *Follow up sample after sample that exceeded the recommended limits. Samples that exceed the recommended limits are re-sampled for three consecutive weeks.

    TNTC indicates Too Numerous To Count

    ~ indicates that the sample was unable to be read due to the overgrowth of another organism.

    X indicates that the area is closed for the season.