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re: Water in Castlebar


Posted by The Waterboy on January 04, 2015 at 18:37:35:

In Reply to: re: Water in Castlebar posted by MaDMAn on January 03, 2015 at 12:39:53:

There is a tendency to add more chlorine when water colour increases - e.g. following heavy rain which washes peaty materials in from the surrounding land. A system like the Lough Mask supply should deal with this using e.g. alum in the plant so it may not be the cause of fluctuations in the case of Castlebar. Wet weather will also bring more bacteria from the land surface - cattle, sheep, septic tanks all contribute more in wet weather.

Having written that paragraph above I have just checked online at the EPA website for Lough Mask regional water supply list of incidents where EPA standards were breached in 2013. There were two breaches for what are called trihalomethanes - these are the potentially smelly biproducts from chlorination of organic material such as peat. Also one breach of bacteria where a single count was found in one sample.

The Lough Mask treatment plant, which supllies drinking water to nearly 30,000 people at this stage, is also listed, in a separate report on remedial actions required, as requiring increased capacity to improve the trihalomethane problem. (And also the plant operators are required to investigate alternative disinfection technologies!) So it looks like the Castlebar and Mayo water supply also runs on a bit of a knife edge with regard to full treatment - perhaps bringing the issue of putting more investment into our creaking infrastructure a little closer to home here in Castlebar.

It is good at the same time that we can so easily get access to data like this and answer the question re chlorine smells in Castlebar tap water.

Check this link and the one below for more data.

http://www.epa.ie/pubs/reports/water/drinking/Q3%202014%20RAL.pdf

 
 
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