THM Water Test
THMs in Ireland
Trihalomethanes (THMs) are chemicals that form when organic material in treated water reacts with chlorine.
The HSE classifies THMs as possibly carcinogenic. Some studies suggest that long-term exposure (years) to high levels of THMs may be linked to a slightly increased risk of some types of cancer in humans, in
particular bladder and colon cancer.
Most drinking water in Ireland comes from surface water sources such as rivers, lakes and
streams. These water supplies often contain high levels of vegetation, also known as organic
material that are treated with Chlorine to prevent the growth of bacteria and viruses.
What we can do for you
Our THM test will accurately detect whether or not THM is present in your water sample.