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Effects of Sewage Treatment

Harbour Bacteria Levels

Back to Harbour Sampling Program page

Water quality objectives have been set for Halifax Harbour.  Provision of sewage treatment has achieved these objectives.  For example, national standards set 200/100mL of fecal coliform, and 35/100ml of enterococci, as the maximum safe bacteria limits for contact recreation.  Enterococci is considered the best indicator for marine waters.  The data show that many locations throughout the middle and inner Harbour exceeded this limit prior to treatment (red numbers), but that with sewage treatment for Halifax, Dartmouth and Herring Cove, the harbour is now suitable for swimming (blue and green numbers).

Click on each image to see a larger version.

 

Harbour with Halifax, Dartmouth and Herring Cove

Sewage Treated

- August 24, 2010

       Harbour bacteria August 24 2010

 

Harbour with Halifax, Dartmouth and Herring Cove

Sewage Treated

- July 27, 2010

        Harbour Bacteria July 27 2010

 

Harbour with Halifax, Dartmouth and Herring Cove

Sewage Treated

- June 25, 2010

      Harbour bacteria July 25 2010

 

Harbour with Dartmouth Sewage Treated

(Halifax plant not functional due to flooding)

- February 11, 2009

         Fecal coliforms Q19

 

Harbour with Halifax and Dartmouth

Sewage Treated

- October 22, 2008

          Harbour with Halifax and Dartmouth treatment

 

Harbour with Halifax Sewage Treatment

- June 4, 2008

          Harbour with Halifax treatment

 

Harbour Before Sewage Treatment

- June 5, 2007

          Harbour before treatment