GeraMarket / UK water company performance / South East Water
South East Water: Performance Report
Rank #8 of 19 UK water companies · GWSS 75.8/100 (Good) · Leakage 96 l/p/d · Interruptions 00:44:06/property · CRI 1.09 (Ofwat APR 2024-25 / DWI 2024)
How does South East Water perform compared to other UK water companies?
In Ofwat APR 2024-25 / DWI 2024, South East Water ranks #8 of 19 UK water companies with a Gera Water Service Score (GWSS) of 75.8/100 — Good, 5.0 points above the national median of 70.8/100. Key metrics: leakage 96 l/p/d, supply interruptions 00:44:06/property, Compliance Risk Index 1.09 (Ofwat APR / DWI 2024, OGL v3.0).
Leakage score
69.5/100
96 l/p/d
E&W avg: 109
▼ below avg · weight 40%
Interruptions score
69.7/100
00:44:06
E&W avg: 22 mins
▲ above avg · weight 30%
Water quality score
90/100
CRI 1.09
E&W avg: 3.72
▼ below avg · weight 30%
South East Water performance figures (Ofwat APR 2024-25 / DWI 2024)
| Measure | Value | vs England & Wales |
|---|---|---|
| Gera Water Service Score (GWSS) | 75.8/100 | Good (grade B) |
| Overall rank | #8 of 19 | vs national median GWSS 70.8/100 |
| Leakage | 96 l/p/d | ▼ below E&W avg 109 l/p/d |
| Supply interruptions | 00:44:06 | ▲ above E&W avg 22 mins |
| CRI (water quality) | 1.09 | ▼ below E&W avg CRI 3.72 |
| Region | South East | Ofwat regulatory area |
South East Water CRI trend (2021–2024)
Compliance Risk Index (lower = better). Source: Drinking Water Inspectorate (DWI) via DiscoverWater.co.uk.
| Year | CRI | vs E&W avg (3.72) |
|---|---|---|
| 2024 | 1.09 | ▼ below avg |
| 2023 | 1.49 | ▼ below avg |
| 2022 | 1.31 | ▼ below avg |
| 2021 | 1.09 | ▼ below avg |
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Frequently asked questions
- What is South East Water's GWSS score?
- South East Water scores 75.8/100 on the Gera Water Service Score (GWSS) in 2024-25 — Good (grade B), ranking #8 of 19 UK water companies. The score combines leakage (96 l/p/d, weight 40%), supply interruptions (44 mins, weight 30%), and water quality CRI (1.09, weight 30%) from Ofwat APR 2024-25 and DWI data.
- How much water does South East Water leak?
- South East Water lost 96 litres of water per property per day through leaks in 2024-25, below the England and Wales average of 109 l/p/d. Source: Ofwat Annual Performance Report 2024-25, via DiscoverWater.co.uk (OGL v3.0).
- How often does South East Water cause supply interruptions?
- In 2024-25, South East Water customers experienced an average of 00:44:06 of lost water supply per property from interruptions lasting 3+ hours — worse than the national average of 22 mins. Source: Ofwat APR 2024-25 via DiscoverWater.co.uk.
- What is South East Water's Compliance Risk Index (CRI)?
- South East Water's CRI in 2024 was 1.09, below the England and Wales average of 3.72. The CRI measures overall performance against national drinking water quality standards (lower = fewer compliance failures). Source: Drinking Water Inspectorate (DWI), Jan–Dec 2024, via DiscoverWater.co.uk.
- How has South East Water's water quality changed over the past 4 years?
- South East Water's CRI (Compliance Risk Index) over the past 4 years: 2024: 1.09, 2023: 1.49, 2022: 1.31, 2021: 1.09. Lower CRI = fewer quality compliance failures. Source: Drinking Water Inspectorate (DWI), via DiscoverWater.co.uk.
Other South East water companies
Contains public sector information published by Ofwat / Drinking Water Inspectorate and licensed under the Open Government Licence v3.0. Source: Ofwat APR 2024-25 + DWI CRI 2024 (via DiscoverWater.co.uk) (Ofwat APR 2024-25 / DWI 2024, published June 2026 (Ofwat APR 2024-25)).