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Bloomington Water Tests Show Improved Quality

By James Gray

Posted May 5, 2016

Bloomington water contains rising amounts of DBPs.

The level of Disinfectant By-Products, or DBPs, in Bloomington's water is decreasing after the city made changes to its water treatment process last month.

DBPs are created when disinfectants, like chlorine, interact with organic matter. They have been linked to health risks such as cancer.

In January, Mayor John Hamilton announced DBP levels had been increasing for several years.  The city began an aggressive campaign against the DBPs with many changes to the water treatment occurring in April.

DBP levels usually rise with warmer weather. The combination of the changes in weather and treatment created interest in April's results.

The city is monitoring Disinfectant By-Products HAA5 and TTHM.

HAA5 levels came in between 52 and 60 parts per billion in March. In April,they were significantly lower, between 28 and 34 parts per billion.

TTHM levels were between 46 and 54 parts per billion in March. In April, they dropped to between 28 and 34 part per billion.

In an email, Bloomington's Water Quality Coordinator Rachel Atz says, "It such a relief to have confirmation that we are moving in the right direction."

The City of Bloomington Utilities plans to continue testing DBP levels monthly and adjusting  the water treatment process as needed.

In a statement, Bloomington Mayor John Hamilton says, "While it is too early to know that the changes made at the treatment facility and in the delivery system will continue to produce encouraging test results, we remain committed to providing our customers with safe drinking water and water quality updates."

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