Course Details
Course Details
Course ID
224
Course Name
Disinfection By-Products: Summary of the Rule
Contact Hours
2.0
Approved Industry
Drinking Water
Partner Name
CEU Plan
Primary Contact
Bill Edgar
wwedgar@ceuplan.org
352-754-1259 Ext.
Website
Description
The group of organic disinfectant by-products called trihalomethanes (THM) and haloacetic acids (HAAs) are formed when chlorine is added to water containing natural organics produced by decaying matter. The first Disinfection By-Products (DBP's), trihalomethanes (THMs) were identified in chlorinated water in 1974, and regulated under the Safe Drinking Water Act in finished water in 1979.
The National Primary Drinking Water Regulations: Disinfectants and Disinfection By-Products; Final Rule was promulgated in December 16, 1998 (40CFR Parts 9, 141, and 142). Under this new regulation the USEPA established Maximum Residual Disinfectant Levels and goals for chlorine, chloramines, and chlorine dioxide; Maximum Contaminant Level Goals for DBPs such as THM and HAA and treatment techniques for DBP presursors.
Disinfection by-products are linked to disinfection practices in the water treatment process. When chlorine is applied to a raw source water, it can form chemical bonds with certain organic precursors. The formation of these DBPs depends upon the disinfectant residual and contact time, water temperaturem pH, concentration of organic material, and bromide ion concentration
Course Level
Basic thru Advanced
Course Content
Target Audience
Water and Wastewater Treatment Plant Operators
Training Format
Virtual Asynchronous