If fluoride is "harmless" why did the EPA in 2005 call for a moratorium on fluoride in drinking water?

Fluoride:

Fluoride is a by-product of aluminum production. (Please read about aluminum below and also its use in common cooking utensils on our Food Preparation page.)  Fluorides, like lead, attack the central nervous system but are even more toxic than lead. For more on health effects, with documentation: http://www.fluoridealert.org/health/index.html with more here:http://www.fluoridation.com/

Sources of fluoride include fluoridated toothpaste, fluoridated tap water, infant formula, juices, tea (especially non-organic and instant teas), processed cereals, soda, wine, beer, mechanically deboned chicken, canned fish, shellfish, cooked veal, teflon pans, fluoridated salt, aneasthetics (enflurane, isoflurane and sevoflurane), and cigarettes. Also pesticides and superphosphate fertilizer made from rock: http://www.fluoridealert.org/f-sources.htm
Consider this: if fluoride is "harmless" why did the EPA in 2005 call for a moratorium on fluoride in drinking water?

You may want to read this out-of-print book, published in 1958 under the title of Your Health and Sanity in the Age of Treason by Reverend R. Swinburne, M.D. and published by the Humanitarian Society. The book focuses primarily, though not exclusively, on sodium fluoride, using quotes from doctors, dentists, and the USDA. Online text is here.
Although Mindell does not make a distinction between naturally occuring fluorine and sodium fluoride as the above book details, the following segment provides the not-so-pretty story concerning the manner and reasons for which sodium fluoride entered the food and water supply. Also correct is that in excess amounts, both fluorine and sodium fluoride are poisons although as Swinburne points out, each have differing effects on human health). The following as quoted from Earl Mindell, Rph, Ph.D in his book Prescription Alternatives, 2nd edition: 

"The story behind the story: During WWII we learned how to manufacture things from aluminum: airplanes, buildings, pots and pans, to name a few. [See our info on aluminum pans at our page on Food Preparation.] We also greatly increased our production of chemical fertilizers. The downside of both these manufacturing processes was a byproduct called fluoride. Altho fluoride is a trace mineral naturally occuring in our food, in anything but those trace amounts it's a more potent poison than arsenic.  Disposing of the 1000's of pounds of fluoride by-product became a major problem in American manufacturing. The manufacturers tried blowing it out their smokestacks, dumping it into rivers, and burying it in the ground, but the immediate result was dead and deformed cows and other animals within miles of the smokestacks, rivers full of dead fish and poisoned aquifers. In fact, its primary use was as a rat poison. Finally the US Public Health Service did a study that claimed to show that one part per million of fluoride in water reduced tooth decay by 60%, and thus began the trickling of fluoride into our water supply.
The price of fluoride went up 1000% almost overnite, and the problem of how to dispose of a potent toxin was solved. The practice of water fluoridation was further justified by more glowing (but flawed) studies claiming to show that communities using fluoridated drinking water had a much lower rate of tooth decay. . .
.....Japan and all continental Europe either rejected the fluoride concept from the beginning or have stopped the practice. Most of Great Britain has also discontinued the practice, and Australia and New Zealand are in the process of reversing the trend. A 1994 study of virtually all of New Zealand schoolchildren showed no benefit in dental health in fluoridated communities.  . .
So much fluoride has been put into our water and toothpaste over the past 30  years that levels in our food chain are very high. While eating a normal diet, the average person EXCEEDS the recommended dose. Fluoride is a potent enzyme inhibitor that interferes with enzymes in the body, particularly in the lining of your intestines, causing stomach pain, gas and bloating. This enzyme-inhibiting effect also interferes with thyroid gland function.  Some studies indicate that fluoride damages the immune system, leading to autoimmune disorders and arthritis. There is also evidence that communities with fluoridated water have a higher incidence of heart disease, and higher rates of bone cancer in young men. Some 30% of the children in fluoridated communities have fluorosis, a malformation of tooth enamel that causes discoloration (usually chalky white patches) and brittleness. This is a permanent change in the teeth that has been associated with abnormal bone structure.

. . . Fluoride is absorbed through the mucous membranes. . . There have been numerous reports of children poisoned by ingesting high levels of fluoride through school fluoride mouthwash programs, or fluoridated toothpastes full of sweeteners that children want to swallow. . . Please avoid fluoride, in all forms including toothpaste. . . "