Chlorine Decay, Water Age, and THMs - OH MY - Ohiowater.org
Chlorine Decay, Water Age, and THMs - OH MY - Ohiowater.org
Chlorine Decay, Water Age, and THMs - OH MY - Ohiowater.org
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<strong>Chlorine</strong> <strong>Decay</strong>, <strong>Water</strong> <strong>Age</strong>, <strong>and</strong> <strong>THMs</strong> – <strong>OH</strong> <strong>MY</strong>Summary• Computer models can be useful for establishing operatingtargets• Hydraulic modeling can be useful for predicting water age• Residual decay modeling can predict water age close to hydraulicmodels <strong>and</strong> can predict residuals in the system• THM formation is a function of many parameters thatcannot be totally controlled• Reducing <strong>org</strong>anics, managing pH, <strong>and</strong> controlling water age are bestpractices for lowering THM formation– Reduces residual decay that results in higher <strong>THMs</strong>– Reducing water age by flushing <strong>and</strong> storage levels reduces THM formation• Tank mixing <strong>and</strong> aeration helps remove <strong>THMs</strong> that form in the system43
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