Challenge The shallow aquifer supply that the city planned to switch to in order to support its water resources objectives had dissolved organic carbon (DOC) concentrations that ranged from 3.8 to 4.7 mg/L. Simulated distribution system (SDS) DBP formation potential tests run on the water resulted in TTHM and HAA5 formation both in excess of 270 µg/L, well over the EPA MCL of 80 µg/L for TTHM and 60 µg/L for HAA5. These results indic

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