The most common cause of lead in drinking water is the corrosion of plumbing fixtures and solders containing lead. The drinking water supplied to the distribution system of the City of Dayton does not contain lead at a detectable level. In addition, the treatment process adjusts the pH level and mineral content to deliver non-corrosive drinking water to the distribution system. As a precaution, lead usually can be eliminated from drinking water by allowing cold water to run until it gets as cold as it will get, before using the water for drinking or cooking. The City of Dayton Water Quality Laboratory extensively samples and tests drinking water from sites throughout the distribution system.

Fluoride occurs naturally in City of Dayton well water and in groundwater throughout the United States. Our water treatment plants supplement the natural fluoride to protect teeth from dental caries (cavities). The natural fluoride is increased from approximately 0.35 parts per million to 1 part per million. After City of Dayton residents voted in favor of fluoridation the Ohio EPA required Dayton's water plants to feed fluoride continuously.

Minerals dissolved in water settle out when water is heated. The minerals will accumulate as "white spots in coffeepots". To remove these spots, fill the coffeepot with vinegar and let it sit overnight. In the morning, rinse out the coffeepot several times with water.

"Cloudy water" is usually caused by the release of dissolved air from water. This is quite common and harmless. When watched closely, the dissolved air (cloudiness) slowly travels upward, out of solution. Cloudiness can also be caused when natural minerals in water come out of solution.

Chlorine is added to drinking water as a disinfectant . Disinfectants destroy disease causing bacteria and viruses. Treatment plants add chlorine at a constant dosage to maintain an adequate concentration throughout the distribution system, as required by the Environmental Protection Agency.

Residents from throughout the distribution system occasionally experience reddish or brownish discolored water. This is usually caused by increased flow through water mains which dislodges iron deposits. This is usually not a health threat, but consumers should refrain from using the water until the disturbance is over. After that, the water should be allowed to run until it clears before using.