The Department of the Environment amended Md. Code Regs 26.04.01, Water Supply, Sewage Disposal, and Solid Waste. The rules are intended to reduce the risk of viruses in groundwater systems, update the unregulated contaminant list, enhance the implementation of existing rules to protect public water system customers from exposure to lead and copper in drinking water, and clarify the requirements of current state regulations to control disinfectants and disinfection byproducts and surface water treatment. The change was adopted January 21, 2011, and the rules take effect March 7. http://www.dsd.state.md.us/mdregister/3805.pdf pp. 319-20.