Chlorine and alternative disinfection guidance manual

Page - Community and nontransient noncommunity water systems that use chlorine or chloramines must measure the residual disinfectant level in the distribution system at the same point in the distribution system and at the same time as total conforms are sampled, as specified in § Subpart H systems may use the results of residual disinfectant concentration . Research shows that chloramine and chlorine both have benefits and drawbacks. Chlorine is a highly effective method of disinfection. However, while in the pipes it produces small amounts of chemicals (called “disinfection by-products”) if the source water has higher levels of dirt or germs that may react with chlorine. Water disinfection by chlorine Chlorine has been used since to disinfect water supplies in the United States to protect public health. Disinfection in water treatment is required by the Surface Water Treatment Rule which was created in June, This rule mandates two components for effective disinfection. • Removal by filtration.

April EPA Guidance Manual Alternative Disinfectants and Oxidants Chlorination is used in water treatment facilities primarily for disinfection. Because of chlorine’s oxidizing powers, it has been found to serve other useful purposes in water treatment, such as (White, ): • Taste and odor control; • Prevention of algal growths;. April EPA Guidance Manual Alternative Disinfectants and Oxidants 1. INTRODUCTION Objective of this Manual Chlorine is, by far, the most commonly used disinfectant in the drinking water treatment industry (Sawyer et al., ). Today, chlorine is used as a primary disinfectant in the vast majority of all. Disinfection Profiling and Benchmarking Technical Guidance Manual. 0 4 8 12 16 20 24 28 32 36 40 44 48 52 Log Inactivation Log Inactivation Benchmark Week Tested.

Agency guidance manual Ct% values are higher than Ct% values calculated attractive alternative disinfectant to chlorine for drinking water. disinfect drinking water use chlorine because of its Source: EPA Guidance Manual () potential by-products of alternative disinfectants. Section covers alternative disinfectants. Water systems using free chlorine for primary disinfection must measure free chlorine residual, temperature, and.