Estimate the annual cost savings of Waterloo Region’s recent decision to stop the addition of fluoride to its water. The population of Waterloo Region is approximately 121,700 people with the average person using 329 L of water per day. Hexafluorosilicic acid (H2SiF6) was being used to fluoridate the water to the level of 0.7 ppm (0.7 g F/1,000,000 g water); a 30 mass% solution of hexafluorosilic acid can be purchased for $367/ton. Water has a density of 1.00 g/mL.
Data: 1 ton = 2240 lbm, 1 year = 365 days

Question

Estimate the annual cost savings of Waterloo Region’s recent decision to stop the addition of fluoride to its water.  The population of Waterloo Region is approximately 121,700 people with the average person using 329 L of water per day.  Hexafluorosilicic acid  (H2SiF6) was being used to fluoridate the water to the level of 0.7 ppm (0.7 g F/1,000,000 g water); a 30 mass% solution of hexafluorosilic acid can be purchased for $367/ton.  Water has a density of 1.00 g/mL.  
	Data: 1 ton = 2240 lbm, 1 year = 365 days