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Most drinking water contains a number of small harmless bacteria. If you would like to read more about these, please see the factsheet below.

This will tell you about the different types of bacteria that can be found in water, how IWNL test for bacteria in your water supply and what happens if bacteria is detected.

If you would like to talk to IWNL about any of the issues covered in the below factsheet, please contact us on 02920 028 711, or fill in our contact form