Private water supplies

A private water supply is any water supply which is not provided by a water utility company. The source of the supply may come from:

  • Wells
  • Boreholes
  • Springs
  • Rivers or streams
  • Lakes or ponds
  • Private distribution systems (mains water privately distributed by a second party)

Register your private water supply

All private water supplies must be registered with the Council for inclusion on the public register.

To register please email your contact details, a brief description of the supply and location to:

Requirement for water supply risk assessment and sampling

The Private Water Supply regulations 2016 require every relevant supply to have a risk assessment done by the council. Risk assessment helps to find potential hazards to human health and likely failure of national drinking water standards. The risk assessment will involve surveying the supply; source through to point of use to find factors that could contaminate the water supply.

The following lists are the risk assessment and sampling requirements for each supply:

Single private dwellings

Do not require routine monitoring or a risk assessment, unless tenanted. However, a sample or risk assessment can be undertaken on request.  

Small domestic supplies

The amount of monitoring will depend on the outcome of the risk assessment. However, it will be a minimum of once every five years. Supplies will be sampled for five basic issues and anything else that results from the risk assessment.  

Private distribution systems

Monitoring must be carried out according to the outcome of the risk assessment.  

Large supplies or commercial premises

Both check and audit monitoring are required on these supplies, the frequency of which will depend on the volume of water used by the supply and the outcome of the risk assessment: 

  • Check monitoring ensures the wholesomeness of the water.
  • Audit monitoring determines whether the water supply meets the relevant standards.

Change in advice and guidance on nitrate levels

In 2019 Public Health England has reviewed and changed their guidance in relation to nitrate in drinking water in light of the new health based information.

"In light of more recent concerns over potential effects on the thyroid expressed by the WHO and Health Canada and because total intake from water and diet could exceed the [Acceptable Daily Intake] ADI for adults above a water concentration of 50 mg/l we do not recommend that anyone should regularly consume above 50 mg/l."

The revised concentration of 50mg/l for taking action in all cases is effective immediately.

The Drinking Water Inspectorate has updated its guidance on nitrate following these changes.

Fees for private water supply services

The following table shows fees and services we provide:

TypeBasic ChargeVAT Status 
Risk Assessments
Risk Assessment & Review (Per Assessment) Hourly rate £43  Non Business
Single Domestic Supplies Risk Assessment (Per Assessment)  Hourly rate £43 Standard
Sampling Costs    
Investigation £100 + hourly rate  Non Business
Granting & Authorisation £100 + hourly rate Non Business
Sampling Visit Cost  £100  Non Business
Courier Fee  At Cost Non Business
Analysing a Sample    
Taken under Regulation 10 Cost of Analysis Non Business
Group A Sampling (Check) (Not exceeding £100) Cost of Analysis Non Business
Group B Sampling (Audit) (Not exceeding £500) Cost of Analysis Non Business
Requested Sampling  Costs of Analysis Non Business

Disclaimer: The council cannot confirm a set cost in relation to sampling - All costs are subject to variation dependent on suggested testing.

Investigation and action in event of a water failure

Any sample that fails to meet the drinking water standards laid out in the Private Water Supply Regulations 2016 will result in the supply being investigated by the Council to determine the reason for this failure.

If you are concerned about potential contamination of your supply please contact your water provider or the Council for advice.

In the event of failure or risk assessment, where a supply is found to be unwholesome or a potential danger to human health, a notice will be served restricting the supply. The notice will be specific for each supply that has a failure of standards. Failure to comply with a notice may result in prosecution in a Magistrates Court.

Cotswold District Council
Trinity Road