ConnexinPowered by ConnexinOS

Better
than sector benchmark
Level
in line / mid-table
Worse
needs attention

Compare all companies

Selected supplierOther companiesSector average (where reported)

Environmental improvement actions delivered on time

Share of planned actions completed within deadline (higher is better). Water-only Bristol and Portsmouth have no figure in the report.

Water supply interruptions vs last year

Average minutes lost per property. Northumbrian, Severn Trent and Thames do not have a change quoted in the report.

Customer satisfaction league table (C-MeX)

Definitions and how to read this

Measures
  • Drinking water standard: share of tests meeting the legal wholesomeness requirement.
  • Discolouration / taste and odour contacts: consumer complaints per 1,000 population (lower is better).
  • Serious pollution incidents: category 1 and 2; total groups categories 1 to 3.
  • Self-reporting: share of incidents the company reports to the regulator first.
  • Environmental improvement actions: share of WINEP actions completed within planned deadlines.
  • Household consumption (PCC): daily water use per person.
  • Leakage per property and total leakage: water lost from the network.
  • Supply interruptions: average minutes lost per customer for interruptions of three hours or more.
  • Internal sewer flooding: incidents per 10,000 sewer connections.
  • C-MeX: customer satisfaction score; the table shows the rank of 17.
How the verdicts work
  • Where the report gives a sector benchmark (drinking water, contacts, leakage, consumption, sewer flooding), the verdict compares the company with it using simple bands.
  • Where it does not (incident counts, self-reporting), the verdict is the company's position in the league: top third is Better, bottom third is Worse.
  • Improvement actions: 100% is Better, 93% to 99% is Level, lower is Worse. Customer satisfaction: top 5 Better, 12th or lower Worse.
  • Supply interruptions: an improvement of 20% or more is Better, a smaller improvement is Level, any deterioration is Worse.
  • Ranks, population shares and verdict bands are calculated from the report's company pages, not stated in the report. Population is the "over X million" figure quoted, so shares are approximate.
  • Calendar-year data (pollution, drinking water) and financial-year data (leakage, interruptions, satisfaction) are mixed, as in the source.
  • Some measures are not quoted for every company, so rankings use the companies with a figure. Pollution and sewer flooding measures mainly apply to the 11 water and sewerage companies.
Source: Water industry performance insights: a joint water regulator report, October 2026 (Drinking Water Inspectorate, Environment Agency, Natural Resources Wales, Ofwat). Charts, verdicts and rankings calculated from the company sections of that report.