ClosedMedium impactAI Generated

UK ICO Fines South Staffordshire Water £963,900 for Cyberattack Exposing 664k Customer Records

Detected 12 May 2026Occurrence date not yet established -- showing first detection by the desk.·
🇬🇧 South Staffordshire, England, United Kingdom — headquarters of South Staffordshire Water Plc1 reportEnded 29 May 2026
CyberPropertyCyberCasualty & Liability

The UK Information Commissioner's Office (ICO) has fined South Staffordshire Water Plc and its parent company South Staffordshire Plc £963,900 ($1.3 million) following a cyberattack that exposed the personal data of approximately 663,887 customers and employees. The fine represents a regulatory enforcement action against a critical infrastructure operator in the UK water sector. The incident highlights ongoing cybersecurity vulnerabilities in essential utility providers and the growing regulatory consequences of inadequate data protection measures.

AI-generated from linked source reports. See our correction policy.

Impact verdict

Medium impact. The £963,900 fine and exposure of over 663,000 individuals' data represents a meaningful but not catastrophic cyber incident. The event is significant for cyber liability and regulatory risk lines, particularly as it involves a critical infrastructure operator, but the financial penalty is moderate in scale.

View assessment methodology

How we grade what we know -- Known · Reported · Uncertain. Methodology →

Intelligence ledger

Each line expands in place to its underlying sourced claim.

Known4 lines

ICO fined South Staffordshire Water Plc and South Staffordshire Plc £963,900 ($1.3 million)
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No separate sourced-claim record is available for this line yet.
The cyberattack exposed personal data of 663,887 customers and employees
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No separate sourced-claim record is available for this line yet.
The fine was announced on or around 12 May 2026
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No separate sourced-claim record is available for this line yet.
South Staffordshire Water is a UK water supplier
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No separate sourced-claim record is available for this line yet.

Reported2 lines

The breach involved both customer and employee personal data
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No separate sourced-claim record is available for this line yet.
South Staffordshire Plc is the parent company of South Staffordshire Water Plc
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No separate sourced-claim record is available for this line yet.

Uncertain3 lines

The exact nature of the cyberattack (ransomware, data exfiltration, etc.) is not specified in the excerpt
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No separate sourced-claim record is available for this line yet.
The date of the original cyberattack is not specified in the excerpt
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No separate sourced-claim record is available for this line yet.
Whether remediation actions have been completed is unknown
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No separate sourced-claim record is available for this line yet.

Affected countries

🇬🇧 United Kingdom

Timeline

Status Change2 Jun 2026, 13:05

Lifecycle changed

monitoring → closed

Closure2 Jun 2026, 13:05

Event Closed

auto_closed_monitoring_timeout

Status Change29 May 2026, 05:30

Status changed to monitoring

Auto-transitioned: no updates for 6 hours

active → monitoring

Status Change28 May 2026, 22:36

Status changed to active

remediation: existing authoritative signal

signal → active

Initial Detection12 May 2026, 20:55

Initial Detection

The UK Information Commissioner's Office (ICO) has fined South Staffordshire Water Plc and its parent company South Staffordshire Plc £963,900 ($1.3 million) following a cyberattack that exposed the personal data of approximately 663,887 customers and employees. The fine represents a regulatory enforcement action against a critical infrastructure operator in the UK water sector. The incident highlights ongoing cybersecurity vulnerabilities in essential utility providers and the growing regulatory consequences of inadequate data protection measures.

The Information Commissioner's Office has fined South Staffordshire Water Plc and parent company South Staffordshire Plc £963,900 ($1.3 million) over a cyberattack that exposed the personal data of 663,887 customers and employees.

Source: BleepingComputer (Trade Media) · View source

Lloyd's classifications

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