COMMUNITY WATER FLUORIDATION
Acute fatal poisoning in adults requires the ingestion of 2.5 - 5.0 grams of fluoride in a 2 - 4 hour time frame.
In drinking fluoridated water at 1.0 p.p.m., an adult would have to drink 660 gallons in 2 - 4 hours to reach the lower limit of a fatal dose.