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Bloomington council authorizes powered‑activated carbon system after extended discussion of taste and odor problems
Summary
After months of taste-and-odor complaints linked to high MIB and geosmin readings in city lakes, the Bloomington City Council voted to waive formal bidding and authorize a contract with Kemco Systems Inc. for a permanent powered‑activated carbon (PAC) treatment system to reduce algae-related compounds in the drinking-water supply.
The Bloomington City Council voted to waive formal bidding and authorize a contract with Kemco Systems Inc. for a permanent powered‑activated carbon system to treat taste-and-odor compounds in the city’s drinking water.
City water director Ed Andrews told the council the treatment purchase is intended to address unusually high readings of 2 common taste-and-odor compounds — MIB and geosmin — recorded this season. Andrews said the city recorded a new MIB reading of about 300 nanograms per liter at Lake Bloomington and about 550 nanograms per liter at Lake Evergreen and has been drawing primarily from Evergreen since Jan. 31.
“Safe water has always been our main objective,” Andrews said, describing work the department has done to add temporary PAC feed, increase the number of filters operating and…
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