Lyon County Utilities treats its groundwater with a 12.5% solution of sodium hypochlorite and maintains a 0.2 ppm to 0.7 ppm residual through out the water system in accordance with the Bureau of Safe Drinking Water standards. The Utility Department does not use chlorine in a gas form. Filtration or advanced treatment is not required at any of our sources since all primary and secondary water quality standards are met or exceeded.