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Castle Water Castle Water
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Business Details
12 Years
experience
Emergency
services
Trusted Business Water Services UK
Castle Water is the UK's largest independent business water retailer, established in 2014 to revolutionise commercial water services. With over 450 dedicated professionals, we serve more than 250,000 customers across England and Scotland, offering tailored solutions for businesses of all sizes. Our core services include water supply, wastewater management, and specialist trade effluent services, supported by advanced metering and leak detection technologies. As an independent retailer, we advocate for customer interests by challenging industry norms and negotiating fair pricing. Our commitment to sustainability is demonstrated through initiatives like free automatic meter reading installations and drought resilience projects.

We provide 24/7 emergency water provisions through our WaterTight service and partner network, ensuring business continuity during supply disruptions. Our online portal offers real-time account management, consolidated billing, and usage tracking tools. With a 97.3% meter read success rate, we maintain industry-leading operational efficiency. Our team's expertise extends to regulatory compliance, particularly in complex trade effluent management, where we secure bespoke consent limits for industrial clients. Recognised for market performance excellence, we combine technical expertise with customer-centric service to deliver cost savings and environmental benefits.
Services
Business Water Supply Wastewater Management Trade Effluent Services Leak Detection Water Efficiency Audits Automatic Meter Reading Contingency Planning
Served areas
  • Scotland, England
Details
  • Year established: 2014
Highlights and features
  • No hidden retail fees or sneaky small print
  • Monthly in arrears payment with no advanced payments
  • Market-leading trade effluent expertise and support
  • 24/7 online portal with real-time account management
  • Independent from water wholesalers to advocate customer interests
What people say
Award-winning service Significant cost savings Excellent support Transparent pricing Reliable emergency response
Website
Services
Business Water Supply
Castle Water provides competitively priced business water supply services across the UK. Our independent status allows us to negotiate better rates while maintaining service quality. We handle all aspects from initial quotation to billing, with no hidden fees. Our customers benefit from consolidated billing for multiple premises and flexible payment options. With 97.3% meter read success rate, we ensure accurate billing based on actual consumption.
Trade Effluent Services
Specialist management of trade effluent for industrial and commercial clients. We secure bespoke consent limits, handle regulatory compliance, and provide expert dispute resolution. Our team negotiates with wholesalers to ensure fair treatment and cost efficiency. Services include consent applications, compliance monitoring, and tailored billing solutions. We serve sectors ranging from breweries to engineering firms, ensuring environmental compliance while minimising costs.
Water Efficiency Audits
Comprehensive audits to identify water saving opportunities and reduce operational costs. Our experts assess current usage patterns and recommend efficiency measures tailored to business needs. Services include leak detection, metering solutions, and implementation of water-saving devices. We provide ongoing support for sustainability initiatives and ESG reporting. Customers benefit from reduced volumetric charges and improved environmental credentials.
Leak Detection
Advanced leak detection and repair services to prevent water wastage and billing irregularities. Using automatic meter reading technology, we identify anomalies and dispatch specialist teams for rapid resolution. Our proactive monitoring helps prevent major infrastructure failures. We coordinate with emergency response partners to provide 24/7 support for critical leaks, minimising business disruption and financial losses.
Contingency Planning
Customised water continuity plans to protect against supply disruptions. Partnering with Water Direct, we offer emergency tanker services, bottled water provisions, and temporary storage solutions. Our risk assessment services identify vulnerabilities and develop response protocols. Businesses benefit from priority access to alternative water sources with guaranteed response times, ensuring operational continuity during crises.
People
John Reynolds
Chief Executive Officer
John Reynolds leads Castle Water's strategic direction with extensive experience in water market deregulation and customer advocacy. He has driven the company's growth to become the UK's largest independent water retailer while maintaining focus on transparency and customer value.
Questions
Can I switch business water suppliers?
Yes, UK businesses in England and Scotland can switch water suppliers since market deregulation in 2017.
How much can I save by switching to Castle Water?
Businesses typically save on fixed water charges through our transparent pricing and competitive rates.
Do you offer services for multiple business premises?
Yes, we provide consolidated billing solutions for businesses with multiple locations across the UK.
What trade effluent services do you provide?
We offer complete trade effluent management including consent applications, compliance support, and cost negotiations.
Do you provide emergency water services?
Yes, our WaterTight service offers 24/7 emergency water provisions with rapid response times.
How can I monitor my water usage?
Our online portal provides real-time account access, meter readings, and usage tracking tools.
Videos
Reviews (5)
Fran Brooker
Jun 09, 2026 Report
Rhys was polite and very helpful. He dealt with my query efficiently and I was very satisfied with the outcome. I appreciated talking to a friendly human being over a bot.
Simon F.
Jun 04, 2026 Report
A gent by the name of Daniel Berbel Callejon went above and beyond vis helpfulness, clarity and constancy. Just helpful and courteous too.
Thankyou Mr. Callejon. Other Castle staff too have always been unfailingly helpful. Thanks very much.
Kat
May 28, 2026 Report
Really quick and easy phone call with Castle Water today. I didn't have to wait long and provided the business move out information to Rhys who was able to close my account.
Toli Antov
May 21, 2026 Report
Support @ Castle Water are great (specifically Flora McCgregor today) however the platform cuts any chat after 15 min, so if you need to resolve something which requires more time, just when you think you've achieved your goal, the platform will cut off the chat and you have to start again, so in this respect - that was not great as happened on couple of occasions. Thank you
Erin
May 19, 2026 Report
The live agent I spoke with was incredibly helpful, spoke to me like a normal human being and actually got answers straight away rather than over explaining what I need help with. I didn't get their name unfortunately, but it was the easiest live chat I have ever done. Thank you!