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Much controversy has arisen concerning the water quality in an area northwest of Bridgewater, Nova Scotia.

To resolve the problem, water samples were taken and analyzed for trace metals, from the area which was also mapped. This showed the area to be forested with the preferred drainage direction to be towards the LaHave River. Two dumps were discovered which could affect the area. In order to construct highway 103, two road metal pits were opened. In these pits there is exposure of Halifax slates which have been metamorphased and folded. Interbedded in the slates are iron sulfides. The analysis of the water disclosed patterns of ion distribution radiating from the pits down slope. This is due to acid leaching of the newly exposed beds of iron sulfides in the slates. These mobilized ions are then precipitated down slope with a change in pH and other chemical properties.

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