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On Thursday, the City of Saline reported on its Facebook page that it overused the chemical potassium permanganate while treating its water. The chemical is used to facilitate the removal of iron from drinking water.
"This chemical, potassium permanganate, is certified for use in drinking water treatment and the only adverse effect is aesthetic. It gave a slight pink tint to the water. If you notice this situation, running of the water will clear it up quickly," the notice read.
Bill Briggs, supervisor of water and wastewater for the city, explained a little more.
"While the work was being done, the plant was shut down suddenly, and the potassium permanganate continued to feed briefly before shutting down," Briggs said, explaining the excess chemical. "The amount was very small but potassium permanganate has a strong color with it. We know it was small, partly due to people reporting a pink tinge in their water. It is not harmful at these very low amounts."
Ingesting the chemical at high levels can cause health issues.
Read More:
Potassium-Permanganate-Guidance-and-Risk-Assessment-.pdf
Pink hazardous drinking water plagues Shelby, Iowa
Light freezing rain, with a high of 28 and low of 15 degrees. Light freezing rain for the morning, cloudy for the afternoon and evening, clear overnight.
I have to commend the Saline City manager and engineer for keeping their cool and for their professionalism during the three hour Mill Pond Dam town hall meeting.
I think what's insulting is that the city is bloating the numbers to bolster their case.
Logically, the dam has no practical use. Of course, it's going to cost more. Of course, there's a level of risk there. Of course, over some period of time, it's going to cost more to maintain than a stream.
Life cycle cost analysis is certainly appropriate when considering new assets, but it may not be as appropriate when evaluating existing assets.