Why we collect samples IWNL will collect water samples from your kitchen tap to ensure the water quality meets the standards set by the Water Supply (Water Quality) Regulations 2018. If there are any concerns raised about water quality, possibly by your neighbours, IWNL might also collect samples from your property. These samples will be
The hardness of your water depends on how many naturally occurring minerals are present in it. This will be determined by the geographical features of where you live in the UK.