West Hants Regional Municipality has 3 Water Treatment Facilities each with its ouwn unique process. 

Windsor Water Treatment Plant

The Windsor WTP provides water to the communities of Windsor, Three Mile Plains, Garlands Crossing, Curry’s Corner and Wentworth Rd.  Source water (raw) is supplied by the Mill Lakes Protected Water Area.  The Windsor WTP utilizes a Dissolved Air Floatation (DAF) process with dual media rapid filtration, designed to treat raw water for the removal of colour, turbidity, pathogens, and other impurities to provide high quality effluent for potable and domestic use.

Raw water from Mill Lakes flows to the Falls Brook impoundment at the WTP, and enters the raw water low lift pumping station where lime is added (pH process adjustment) and water is pumped to the WTP.  Aluminum Sulphate (Alum) is added as the coagulating chemical.  The coagulant causes the particles to become destabilized and begin to clump together in the raw water to form floc. Dissolved organics are precipitated and/or adsorbed to the floc. The floc is then floated to the top of the DAF tank using saturated air and water.  The floc is skimmed off the top and the clear water at the bottom is then passed through the multimedia filters.  After the filtration process, the water is then disinfected by Chlorine, pH  adjusted with Soda Ash and a corrosion inhibiter, Polyphosphate is added before it isent to the distribution system.

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Falmouth Water Treatment Plant

The Falmouth WTP supplies water to the communities of Falmouth and Upper Falmouth. Source water (raw) is supplied from the French Mill Brook Protected Water Area. The Falmouth WTP utilizes a Conventional Water Treatment Plant, designed to treat raw water for the removal of colour, turbidity, pathogens and other impurities to provide high quality effluent for potable and domestic use.The plant combines the time proven principles of mixing, coagulation, flocculation, tube settler assisted clarification and high-rate filtration.  Raw water from the French Mill Brook reservoir is pumped from the low lift pumping station into the plant where Soda Ash (pH process adjustment) and Potassium Permanganate (iron and manganese removal) are introduced before the treatment process.  Poly Aluminum Chloride (PAC) is then added for chemical coagulation. The coagulant causes the particles to become destabilized and begin to clump together in the raw water to form floc. Dissolved organics are precipitated and/or adsorbed to the floc. The floc is then  slowed down through the tube settlers and allowed to settle at the bottom of the clarifier.  The clear water at the top is then transferred to the filters.  Once passed through the filtration process, the water is disinfected with Chlorine and pH adjusted with Soda Ash before being sent to the distribution system.

Falmouth

Hantsport Water Treatment Plant

The Hantsport WTP supplies water to the communities of Hantsport, Hants Border and Glooscap First Nations.  Source water (raw) is supplied from the Davidson Lake Protected Water Area. The Hantsport WTP utilizes a Membrane Filtration Water Treatment Process, The water treatment system relies on micro filtration membranes which are designed to treat raw water for the removal of colour, turbidity, pathogens and other impurities to provide high quality effluent for potable and domestic use. Water leaves Davidson Lake and travels through a screened intake structure and flows by gravity into a 6km transmission main to the WTP.  As it enters the plant Poly Aluminum Chloride (PAC) is introduced for chemical coagulation and Caustic Soda is used for process pH adjustment.  From there the water goes through the micro filtration membranes for purification.  After filtration, treated water is disinfected with Sodium Hypochlorite and Caustic Soda is used for pH adjustment and sent to onsite clearwell storage.  Water is then pumped to either Glooscap First Nations or the Hantsport Reservoir for distribution.

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