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Water quality

Private water supplies

Private water supplies are now categorised as follows:

Large/commercial supplies:

  • serves 50 or more people or
  • uses more than 10m3 of water per day or
  • used for commercial purposes or
  • serves a premises to which the public have access

Small supplies:

  • servers two or more properties
  • serves less than 50 people or less than 10m3 per day
  • is not used for any commercial purpose or public premises

Single supplies:

  • supply to a single property where there is no commercial or public use

For large supplies and small domestic supplies we are required to carry out a risk assessment on the supply.

Further details can be found on the Drinking Water Inspectorate website including the maximum fees which we can charge.