Coliforms

> Starting point: a CRE Laval report tabled in autumn of 2001

 Sector targeted: Saint-François east, from rue Claude to the tip of the island

 The objective of the analysis: wastewater flowing from 10 pipes situated on the banks of the Rivière des Mille Îles.

 Date samples were taken: September 18, 2007

 Results of analysis: waste water from 7 out of the 10 pipes examined was shown to contain in excess of 60,000 fecal coliforms per 100 ml measured; (the laboratory does not measure beyond this point)

 Maximum coliform level at which direct contact with the water must be avoided: 1,000 per 100 ml

 Types of installations found in the district:

. Advanced Secondary Treatment Systems: maximum level of 50,000 coliforms

. Standard-sand filter bed: no set norms for waste water coliform content

 All pipes must be submerged in water, to dilute contaminants, as stipulated by provincial regulations. None of the pipes examined were shown to respect these stipulations