Where Saint John water comes from

Saint John drinking water starts as a mix of surface water and wells. The named sources on the utility record are Loch Lomond, Latimer Lake, South Bay Wellfield (groundwater). That is the water that eventually reaches kitchen taps after treatment, not a separate bottled brand.

Saint John uses more than one treatment plant (Loch Lomond Drinking Water Treatment Facility; South Bay Treatment Facility (Spruce Lake Water Treatment Facility)). Utilities often run plants in parallel so different neighbourhoods can be served, or so one plant can cover for another during maintenance. Loch Lomond Drinking Water Treatment Facility: Surface-water plant supplied from Loch Lomond / Latimer Lake watersheds; Latimer Lake pretreatment plus coagulation, dissolved air flotation, filtration, disinfection, and orthophosphate corrosion control; capacity about 75 ML/day; online August 2018. South Bay Treatment Facility (Spruce Lake Water Treatment Facility): Treats South Bay Wellfield groundwater for west Saint John; distribution began September 2017.

After treatment, water moves through pumps, storage, and underground mains to reach streets and buildings. Saint John Water serves roughly 17,000 customer accounts. Loch Lomond facility supplies east/north/south and part of west; South Bay wells supply about one-third of west-side demand, with the balance from Loch Lomond. Spruce Lake / Ludgate Lake reservoirs now supply industrial raw water (and remain a long-term backup), not residential potable water.

One detail that makes Saint John water feel local: Safe Clean Drinking Water Project (~$225M) replaced frequent boil-water history by splitting potable supply between Loch Lomond surface water and South Bay groundwater, while dedicating Spruce Lake to industry. Lab grades for hardness, lead, and pH sit on the city water quality page; this overview is about the route the water travels.