There is no detectable lead in the City of O’Fallon’s water when it leaves the treatment plant and travels through the water mains. The City of O’Fallon also purchases water from Missouri-America Water Company – St. Louis (MO American St. Louis St. Charles Counties) and Public Water District #2 (St. Charles County PWSD#2). These jurisdictions each post a water quality report (consumer confidence report) that is available at https://dnrservices.mo.gov/ccr/index.html. Each of these reports show that lead levels are within acceptable ranges. However, lead can enter drinking water through lead service lines and household plumbing which in most cases is the primary way lead can get into the water. Our drinking water chemistry is meticulously monitored and adjusted to avoid corrosivity as verified by langlier index calculations. Water that is non-corrosive and chemically balanced reduces the natural solvent effect and reduces the absorption of lead into the water. It is impossible to completely eliminate the corrosion of old lead water service lines that leads to lead entering the water supply in some homes. Because of this, it is important for our customers with lead pipes to learn how to reduce the risk of exposure to lead in their water.