We recently researched about water in lead pipes and came across the following useful information from South East Water:
Since the 1970’s, the use of lead as a material for water pipes has been phased out and lead solder has also been banned for use with copper drinking water installations. Consequently the level of lead allowable in drinking water has been reduced from 50 μg/L (micrograms per litre or part per billion) to 25 μg/L which is the current standard. This standard is to be reduced in the future to 10 μg/L by 2013.
The only other source of lead in drinking water in some buildings is fittings made from brass. The extent of lead pick up depends on various factors; temperature, acidity (pH), water hardness, the length of pipe and the time that water is left to stand in the pipe (stagnation) before it is drawn off. Lead can build up in the body and it can be harmful. It is sensible to avoid excessive exposure from any source and it is therefore important to keep lead levels in water as low as possible. There are two options.
You can either replace your lead pipes with other materials such as copper or plastic or follow some simple precautions to minimise your exposure to lead in drinking water. This includes:
-Do not drink water that has been standing in pipes for long periods, for example, overnight or if no one has been in for several hours.
-Run at least a washing up bowl of water off and use on the garden or for something other than drinking or cooking. If the length of lead pipes exceeds 40 metres, more than a bowlful of water will need to be drawn off.
-This need not be wasted but can be used on the garden.
-Do not drink from bathroom taps.
We understand that, if requested, most Water Authorities will attend premises and take water samples for analysis.
Essential Safety