The stuff that comes out of your tap may soon contain a little less of something that has been added to municipal water supplies for years – fluoride. The U-S Department of Health and Human Services is proposing a change to the recommended fluoride levels designed to prevent tooth decay. Grand Forks Water Plant Supervisor Hazel Sletten says the new guidelines are designed to update recommendations dating back to 1962. Sletten says flouride is more widely available today. Grand Forks currently slips in one-point-two milligrams of fluoride per liter of water. The change will reduce that to point-seven milligrams.