This section has links and documents about disinfection byproducts. To protect drinking water from disease-causing organisms, or pathogens, Rutland and most other public water systems add low amounts of chlorine, a disinfectant, to drinking water. Disinfectants themselves can react with naturally-occurring materials in the water to form byproducts, which may pose health risks.
A major challenge for water suppliers is how to control and limit the risks from pathogens and disinfection byproducts. It is important to provide protection from pathogens while simultaneously minimizing health risks to the population from disinfection byproducts. For more information, see fact sheets on Pathogens and Indicators and Disinfectants – visit the EPA basic information page on this topic.
The links that follow give Rutland City’s monitoring results for the two main groups of regulated disinfection byproducts; Haleoacetic Acids (HAA5) and Trihalomethanes (TTHM). Rutland City has never had a violation for Trihalomethanes but has have episodic violations of the allowed levels of Haleoacetic Acids. However, since early 2012 there have been no violations of these standards in Rutland City. As a result, Rutland City is no longer required to plan for changes to our disinfection program.
Documents below report on studies and related information resulting from the City’s investigation into the use of monochloramine as a substitute for chlorine to disinfect our water. Monochloramine is used in water systems serving millions of Americans (Boston is one) to improve the taste (no chlorine ‘pool smell’) and avoid the formation of disinfection byproducts in drinking water.
Total Haleoacetic Acids Results through November 2020
Chart of Haleoacetic Acids Results through November 2020
Total Trihalomethanes Results through November 2020
Chart of Total Trihalomethanes Results through November 2020
Chloramine Frequently Asked Questions
Chloramine_FAQs
Appendix A – Historical Trihalomethanes
Appendix B – Historical Total Haleoacetic Acids
Appendix C – Existing Filtration Performance
Appendix D – GAC Pilot Filter Summary – Turbidity and UVA
Appendix E – GAC Pilot Units – Trihalomethanes and Haleoacetic Acids Sampling
Appendices_A-E
Appendix F – ORICA Final Report
ORICA Final Report
Appendix G – ORICA Budget Proposal
ORICA Budget Proposal
Final Report Disinfection ByProducts Reduction Study
Final Report Disinfection ByProducts Reduction Study
Engineering Feasibility Study on the Costs of Treatment Options for Reducing Disinfection ByProducts in Public Drinking Water System – Volume I (By AECOM, Concord, MA)
Engineering Feasibility Study
Information
Environmental Protection Agency Web Site/Chloramine
Champlain Water Web Site
Vermont Dept of Health
Chemicals in Drinking Water Chloramines
Chloramine_FAQs
Appendices_A-E
Appendix F
Appendix G
Final Report Disinfection ByProducts Reduction Study
Costs of Treatment Options for Reducing Disinfection ByProducts
TTHM_system_results_Data_11-2020
TTHM_system_results_CHART_Through_11-20
HAA5_System_Results_Data_through_11-2020
HAA5_System_Chart_through_11-2020