Wessex Water

Water company Products & services: Water and wastewater services.

Updated: 3 August 2026

Company Overview

Industry: Water supply and sewerage (regional monopoly)
Parent company: YTL Corporation Berhad (Malaysia), via YTL Utilities (UK) and Wessex Water Limited
Regulator: Ofwat (with the Environment Agency and Drinking Water Inspectorate)
Ombudsman: Consumer Council for Water (CCW) reviews complaints; the Dispute Resolution Ombudsman provides binding ADR
Customers: Around 2.9 million (sewerage); about 1.4 million for water supply
Founded: Wessex Water Services Limited incorporated 1 April 1989 (privatisation); Wessex Water region established 1974
Legal entity: Wessex Water Services Limited (02366648)

What customers complain about

Most complaints to water companies, including Wessex Water, concern billing and charges (around two-thirds of all complaints in CCW's 2024-25 data), followed by water and sewerage service issues, sewage/pollution incidents and how compensation under the Guaranteed Standards Scheme is applied. Wessex Water is one of the better-performing companies for complaint handling: CCW rated it top on both complaint volume per 10,000 connections and complaint handling in 2024-25, alongside Portsmouth Water and Bristol Water. Customers typically complain first to Wessex Water (by phone, online or post), escalate within the company to a senior manager, then seek free independent help from CCW, and can finally use the binding Dispute Resolution Ombudsman if the dispute deadlocks.

Complaint categories

1
Billing and charges
Bills and charges are the largest single source of complaints across the water sector, and CCW linked the 2024-25 rise in escalated complaints to customer upset over bill increases.
CCW 2024-25 reporting: billing accounted for around two-thirds of complaints made to water companies (63%) and to CCW (66%). This is a sector-wide share, not a Wessex-specific breakdown.
2
Water supply and sewerage service
Operational issues - supply interruptions, low pressure, leaks, drainage and sewer flooding - are handled separately from billing and are the second main complaint category.
Wessex Water operates separate billing and operational complaint processes with different contact routes (its published complaints guidance).
3
Sewage, pollution and environmental performance
Sewage spills and pollution incidents have driven regulatory and public scrutiny; Wessex Water was the subject of an Ofwat wastewater enforcement case concluded in 2025.
Ofwat confirmed an £11m enforcement package for wastewater treatment and sewer-network failures (December 2025); Wessex Water was fined £500,000 for pollution that killed thousands of fish (November 2024).

Contact methods

Complaint journey

1
Contact Wessex Water (Stage 1)
Report the problem to Wessex Water by the correct route for your issue.
Typical response5 working days
What happens
Contact Wessex Water first. For a billing complaint call 0345 600 3 600; for a water-supply or sewerage complaint call 0345 600 4 600. You can also use live chat, an online enquiry, or write to the relevant address. If Wessex Water cannot resolve it immediately or needs to investigate, it aims to respond within five working days of receiving your complaint.
2
Escalate to a senior manager (Stage 2)
Ask for the complaint to be reviewed by a senior manager if you are still unhappy.
Typical responseVaries
What happens
If you are not satisfied with the first response, contact Wessex Water again and ask for the complaint to be escalated. It will be reviewed by a senior manager, who will look again at what happened and reply with the company's position.
3
Final response (Stage 3)
Wessex Water issues its final position on your complaint.
Typical responseVaries
What happens
If the matter is still unresolved, your complaint moves to the final stage, where Wessex Water sets out its final response. Keep this letter - CCW and the Dispute Resolution Ombudsman will want to see it.
4
Free independent help from CCW
Take the dispute to the Consumer Council for Water for free advice and mediation.
Typical responseVaries
What happens
If you are unhappy with the final response, your complaint is over eight weeks old, or you simply want free, trusted, independent advice, contact the Consumer Council for Water (CCW). CCW investigates and tries to mediate a resolution between you and Wessex Water.
5
Dispute Resolution Ombudsman - binding decision
If the dispute deadlocks after CCW, refer it to the Dispute Resolution Ombudsman.
Typical responseWithin 6 months of CCW closure
What happens
If CCW cannot settle the dispute and it reaches deadlock, you can refer it to the Dispute Resolution Ombudsman, the water sector's independent alternative dispute resolution provider appointed via Water UK in 2026. It gives a final decision that is binding on Wessex Water if you accept it; if you reject it you remain free to pursue the matter through the courts. Apply within six months of CCW's closure letter.

Response times

Where Wessex Water cannot resolve a complaint at first contact or needs to investigate, it aims to respond within five working days of receiving the complaint. If you remain unhappy, the complaint is escalated to a senior manager and then to a final response; Wessex Water does not publish a single fixed timescale for those later stages. Under the industry Guaranteed Standards Scheme, where a GSS payment is due Wessex Water must generally pay within set time limits and, if it misses the deadline, an additional fixed penalty payment applies. You can go to CCW if your complaint is over eight weeks old or once you have a final response, and to the Dispute Resolution Ombudsman within six months of CCW's closure letter.

If your complaint isn’t resolved

If Wessex Water can’t put things right, you can escalate — free of charge — to an independent body:

Consumer Council for Water

Recent news

16 December 2025
Ofwat confirmed an £11m enforcement package against Wessex Water after finding it breached obligations in operating and maintaining its wastewater treatment works and sewerage network; the package exceeds the £10m penalty (around 2.5% of turnover) Ofwat would otherwise have imposed and funds measures to cut spills and improve monitoring.
Read more
10 September 2025
CCW's 2024-25 household complaints report rated Wessex Water top across both measures - complaints per 10,000 connections and complaint handling - for the second year running, one of only three companies (with Portsmouth Water and Bristol Water) to achieve this.
Read more

Earlier cases

11 November 2024
Historic: Wessex Water was fined £500,000 at Swindon Magistrates' Court, plus around £60,000 costs and a victim surcharge, after pleading guilty to charges relating to sewage pollution - including a failure at Bowerhill Lodge pumping station near Melksham that killed more than 2,100 fish in Clackers Brook, a tributary of the River Avon.
Read more

Know your rights

Water Industry Act 1991 and the Guaranteed Standards Scheme (GSS)
Sets the statutory duties of water and sewerage companies and the guaranteed service standards. If Wessex Water misses a defined standard (such as keeping appointments or responding to certain issues), a GSS payment may be due, some automatically. This is general information, not legal advice.
Consumer Rights Act 2015
Services must be provided with reasonable care and skill. Where a chargeable service falls short you may be entitled to a repeat performance or a price reduction. Its application to a regulated monopoly water service is limited, so CCW and the Dispute Resolution Ombudsman are usually the practical routes. This is general information, not legal advice.

Frequently asked questions

How do I complain to Wessex Water?

Contact Wessex Water by the route that matches your issue: call 0345 600 3 600 for a billing complaint or 0345 600 4 600 for a water-supply or sewerage complaint, or use live chat, an online enquiry or post. Where it needs to investigate, Wessex Water aims to respond within five working days.

What if Wessex Water does not resolve my complaint?

Escalate within Wessex Water to a senior manager and then to a final response. If you are still unhappy, or your complaint is over eight weeks old, contact the Consumer Council for Water (CCW) for free independent advice and mediation.

Can I take Wessex Water to an ombudsman?

There is no statutory water ombudsman yet. After CCW, deadlocked disputes go to the Dispute Resolution Ombudsman, the water sector's alternative dispute resolution provider appointed via Water UK in 2026, whose decision is binding on Wessex Water if you accept it. You must apply within six months of CCW's closure letter.

Is Wessex Water a good or bad company for complaints?

Independent watchdog CCW rated Wessex Water top across both its measures - complaints per 10,000 connections and complaint handling - in 2024-25 for the second consecutive year, making it one of the sector's better performers for complaint handling.

Can I get compensation from Wessex Water?

Yes, in defined circumstances. Under the Guaranteed Standards Scheme, payments are due when specific service standards are missed - some automatically - and if Wessex Water misses the payment deadline an additional fixed penalty payment applies. CCW mediation or a Dispute Resolution Ombudsman decision can also result in redress.

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