Chemical contaminants is a broad category that includes more than 60 regulated chemicals largely grouped into three sub-categories: inorganics, synthetic organics (pesticides), and volatile organics. Some of the commonly recognized chemicals in these groups are arsenic, fluoride, nitrate, and atrazine. The chemical contaminants are toxic and/or carcinogenic and are regulated under the Chemical Phase or Phase II/V Rules. Base monitoring requirements under these rules are determined by factors such as water system type, water system size, and source water type.
For detailed information regarding the regulatory management of these chemicals, please see a copy of the Chemical Contaminants Survival Guide. This guide provides an overview of the Phase II/V Rules, lists the maximum contaminant level for each chemical, and outlines monitoring requirements by individual contaminant or contaminant group.