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What’s new

  • Drinking Water 2020 – Quarter 3 has been published

    Click here to view.

    • Published 12:16:20 GMT 22 February 2021
  • Publication of research on Long-term Strategies to Reduce Lead Exposure from Drinking Water

    As a part of our ongoing research programme the Inspectorate commissioned a review of the currently available evidence on lead in drinking water and the possible long term strategies to reduce exposure. A range of scenarios has been costed, using the latest knowledge of the health effects of lead.  These have been modelled and their […]

    • Published 9:50:25 GMT 10 February 2021
  • Measures and tools for disinfection by products minimisation strategies

    In the UK, legislation requires that DBP concentrations must be kept as low as possible without compromising the effectiveness of the disinfection. In addition, a prescribed concentration of 100 µg L-1 has been set for the sum of the concentrations of the four trihalomethanes (THMs) measured at the consumers tap. Although haloacetic acids (HAAs) are […]

    • Published 11:42:51 GMT 9 November 2020
  • Publication of Information Letter 06/2020

    Assessment of the limitations for chemicals and treatment products intended for the treatment of drinking water.

    • Published 10:38:03 BST 11 September 2020
  • Publication of Information Letter 05/2020

    Chloramination disinfection and associated risks of cyanide formation in treated water

    • Published 10:48:30 BST 28 July 2020
  • Government and the water industry regulators in England have issued a joint letter to water companies

    Green economic recovery – the water industry’s role in building a resilient future

    • Published 10:49:54 BST 22 July 2020
  • Drinking Water 2019 – Quarter 4 has been published as part of the Chief Inspector’s Report 2019

    • Published 10:50:47 BST 20 July 2020
  • The Drinking Water Inspectorate has published its annual reports for public and private water supplies in England and Wales covering 2019

    The reports cover the quality of public drinking water supplies and reports on the progress of local authorities in the regulation of private water supplies. Alongside the reports are published sample results and performance statistics for companies. Click here

    • Published 10:51:49 BST 9 July 2020
  • Publication of the executive summary of “Cryptosporidium: Enhancing the water industry’s capability to respond”

    To increase the typeability of Cryptosporidium slide genotyping and improve the industry’s response to Cryptosporidium detections and the management of events.

    • Published 14:24:00 BST 1 July 2020
  • DWI has published Long Term Planning Guidance for water companies

    • Published 10:53:14 BST 29 June 2020
  • Publication of report “Chlorate in Drinking Water”

    Chlorate is a disinfection by–product (DBP) that can arise where sodium hypochlorite, calcium hypochlorite, chlorine dioxide or onsite electrolytic chlorination (OSEC) are used for disinfection. Although there is a legal requirement for water companies to minimise DBP formation, there is no current prescribed concentration or value for chlorate in drinking water in the EU, although […]

    • Published 14:26:52 GMT 1 February 2020
  • Sink to River – River to Tap. A review of potential risks from nanoparticles and microplastics

    The primary objective of this study was to inform the UK and Irish water companies on the levels of microplastic particles present in raw and treated water, wastewater & treated effluent, and the sludges produced by their treatment works. The secondary objective was to develop a robust sampling and detection methodology to allow the quantification […]

    • Published 11:37:29 BST 9 October 2019
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