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City of Manchester
City's Water Supply Administrator
New Hampshire Water Works Association Inc
New England Water Works Association
Normandeau Associates, Inc. - In the News
TOWN COUNCIL AGENDA
Of the half-dozen chemical supply companies ...
Of the half-dozen chemical supply companies that initially expressed interest in selling to Manchester what is referred to in the business as silly acid , only one , Solvay Fluorides Inc. of Allston , Mass. , offered an analysis of each railcar load of its product and expressed a willingness to meet the city's stringent standards , according to David Paris , water supply administrator for Manchester Water Works.We ( the Manchester Board of Water Commissioners ) wrote a specification for hydrofluosilicic acid that. . . would limit the amount of impurities to one-twentieth of what the national standards would allow.We felt that was an appropriate , prudent step on our part and we currently are under contract with a supplier who is meeting that , Paris said of Solvay.Manchester will spend about $55 , 000 a year for its liquid acid , about one-third what it would cost for an equivalent amount of sodium fluoride , the powdered product that is better suited for small water systems.Both the acid and the dry sodium fluoride are derived from the chemical-laced scrubber gases generated during the refining of ore to make phosphate fertilizer.They would be labeled hazardous waste if not for their use as water fluoridating agents.Nine other New Hampshire communities fluoridate their drinking water : Concord , Dover , Portsmouth and Rochester use hydrofluosilicic acid ; Durham , Hanover , Laconia , Lancaster and Lebanon add powdered or crystallized sodium fluoride.The Sunday News contacted water works officials in Concord , Dover , Rochester , Durham , Hanover , Laconia and Lebanon.They all said they do not analyze their fluoridation chemicals , confident that what is sold to them meets purity standards set by the chemical industry and the American Water Works Association.
The Bedford Bulletin Archives, March 22, 2001
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