Water Quality Testing

The Onondaga County Health Department samples Oneida Shores Beach and Jamesville Beach approximately every two weeks during the summer season. Samples are analyzed for bacteria Escherichia coli (E.coli). A result equal to or above 235 E. coli colonies/100 ml represents an exceedance of the state standard. Test results are available approximately 24 hours after the samples are taken, as sample analysis takes 18-24 hours.

Beach Closures
A beach is closed when a sample exceeds the 235 E. coli colonies/100 ml. threshold. The water will then be re-sampled daily until levels decrease. Once acceptable levels of bacteria are found, then the beach will be reopened.

The causes of elevated bacteria levels are not always clear. They may be related to land uses in the watershed, storm water runoff, naturally occurring sand or soil bacteria, or other factors.

Oneida Shores Beach

Date Sampled    Results     Beach Status    Comments
             
8/11/21   66 E.coli per 100 ml (left side)   OPEN    
    166 E.coli per 100 ml (right side)        
             
8/10/21   435 E.coli per 100ml (left side)   CLOSED   The beach remains closed for
    96 E.coli per 100ml (right side)       swimming until further notice
             
8/8/21   687 E.coli per 100 ml (left side)   CLOSED   Closed until further notice
    70 E.coli per 100 ml (right side)       due to high bacteria levels
             
7/29/21    29 E.coli per 100 ml (left side)   OPEN    
     108 E.coli per 100 ml (right side)        
             
7/28/21   1553 E.coli per 100 ml (left side)   CLOSED   Closed until further notice
    1986 E.coli per 100 ml (right side)       due to high bacteria levels
             

7/27/21

  308 E.coli per 100 ml (left side)   CLOSED   Closed until further notice
    52 E.coli per 100 ml (right side)       due to high bacteria levels
             
7/15/21   31 E.coli per 100 ml (left side)   OPEN    
    17 E.coli per 100 ml (right side)        
             
7/12/21   2419 E.coli per 100 ml (left side)
  CLOSED   Closed until further notice
    261 E.coli per 100 ml (right side)       due to high bacteria levels
             
6/29/21   35 E. coli per 100 ml (left side)   OPEN    
    47 E. coli per 100ml (right side)        
             
6/28/21   52 E. coli per 100 ml (left side)   CLOSED   Closed due to high bacteria levels
    727 E. coli per 100ml (right side)        
             
6/14/21   66 E. coli per 100 ml (left side)   OPEN   Covid-19 Guidelines Apply
    10 E. coli per 100 ml (right side)        
             
5/25/21   3 E.coli per 100 ml (left side)   OPEN   Covid-19 Guidelines Apply
    10 E.coli per 100 ml (right side)        
             


Jamesville Beach

NOT OPEN FOR SWIMMING in 2021
 


Questions or concerns? Click here to contact the Onondaga County Health Department.

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