Louisa water tanks still pose problems

Posted on Thursday, May 2, 2013 at 1:39 pm

The Town of Louisa has received six notices of violation for exceeding the maximum contaminant levels (MCL) for disinfection by-products over the past four years.

Among those, four violations were issued for exceeding the MCL for trihalomethanes (TTHM) and two for exceeding the MCL for haloacetic acides (HAA5).

The town purchases treated drinking water from the  Louisa County Water Authority (LCWA) and redistributes water to approximately 600 residential and 160 commercial connections through a distribution system consisting of two elevated storage tanks and approximately 10 miles of pipe.

The town and LCWA have been working diligently to reduce the disinfection by-products in the town’s drinking water and to bring the water in compliance with the Virginia Department of Health (VDH) regulations.

The town applied for and received a planning grant from VDH and retained Gannett Fleming to perform a study and develop a preliminary engineering report to examine the thermal stratification and poor turnover in the town’s two elevated finished water storage tanks. The storage tanks may contribute to elevated levels of disinfection by-products in the water distribution system.

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