non pollution
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- Sept. 2, 2022, 2:43 a.m.
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Hello Mr. socraticDev,
How are you ?
Following the inspection of the river near your place, it seems that the rainbow present in the river is caused by the decomposition of organic/inorganic matter by ferruginous bacteria.
However, to prevent any error on my part, sampling was done and retention measures were installed.
Unfortunately, I did not find an informative article in French, but here are some informative articles on the subject:
https://nwdistrict.ifas.ufl.edu/nat/2021/11/19/iron-oxidizing-bacteria-an-unusual-natural-phenomenon/
https://www.bmcc.nsw.gov.au/media-centre/iron-bacteria-blooms-blue-mountains-given-wet-period
When the analysis results are available to me, I will be able to better decide whether decontamination is necessary. If the source is likely natural, there is no environmental risk.
Cheers,
________________________________________________
Alexandre Caron
Environment and health technician
Environmental monitoring section
Environmental Prevention and Control Division
Prevention and environmental quality