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Castle Water is the UK’s most trusted business water supplier, delivering commercial water and wastewater services to energy providers across the oil and gas industry. From upstream drilling to downstream refining, petrochemical production and distribution, our services help reduce waste, cut costs, and meet strict regulatory standards.
With over a decade of experience supporting high-demand and complex industrial estates, we understand what matters – reliability, compliance, and long-term value. Our clients include major operators in fossil fuel production, chemical manufacturing, and industrial logistics who rely on us for expert support and dependable service.
SUEZ recycling and recovery UK, a major player in sustainable waste and resource management, partnered with Castle Water to consolidate its business water and wastewater services across more than 200 UK sites.
While SUEZ operates across a range of sectors, including industrial and infrastructure, its high-volume water use and wastewater discharge patterns presented challenges familiar to the oil and gas sector – from trade effluent compliance to data integrity and billing accuracy across a large estate.
Castle Water offers tailored commercial water services to the full oil and gas supply chain. We support upstream, midstream, and downstream operations with scalable solutions for water supply, usage optimisation, and wastewater compliance.
Whether you manage a single drilling site or a multi-location refining and distribution estate, we help you take control of water consumption, reduce environmental risk, and stay compliant.
Compliance with UK water regulations is essential for oil and gas operators. Every activity – from water abstraction to wastewater discharge – is governed by environmental legislation enforced by the Environment Agency (England), SEPA (Scotland), and Natural Resources Wales.
Key legal obligations include securing abstraction licences, managing trade effluent discharges, and adhering to the Environmental Permitting Regulations and the Industrial Emissions Directive. Failing to meet these requirements can result in significant penalties, including fines and operational disruption.
Regulatory compliance isn’t just about obtaining permits; it demands continuous monitoring, reporting, and proactive management of water use and wastewater. This is particularly critical for oil and gas operations, where volumes and contamination risks are high.
Castle Water provides expert support to ensure full compliance. Our services include data reporting, trade effluent guidance, emergency response planning, and direct engagement with regulators. As a trusted business water supplier, we help operators reduce risk, avoid penalties, and meet environmental responsibilities with confidence.
From schools to multi-campus universities, managing water in education settings takes more than a basic supply. Castle Water provides tailored services that help you cut waste, improve efficiency, and stay in control of costs – with the tools and support needed to keep your site running smoothly.
Explore expert insights into industrial water efficiency, regulatory updates, and innovations shaping water use in the UK energy industry.
Our UK-based Relationship Managers understand the water needs of the oil and gas industry. We’ll manage your switch, deliver cost savings, and provide the tools you need to stay compliant, efficient, and in control, across every site.
We serve oil and gas drilling companies, refineries, petrochemical plants, LNG facilities, and industrial fuel networks across the UK
The wholesaler handles infrastructure and water supply to your site. Castle Water manages billing, monitoring, leak alerts, trade effluent support, and customer service.
We help secure consents, install monitoring systems, and provide reporting tools to keep you aligned with EA and SEPA discharge limits.
We offer tankered and bottled emergency water to support business continuity during outages, planned works, or contamination incidents.
We offer efficiency audits, AMR metering, and optimised tariffs. Many customers also benefit from leak allowances and improved reporting.
Yes. We provide consolidated invoicing, centralised account management, and usage reporting across all locations.
Yes. Our team will guide you through the paperwork, renewal process, and compliance requirements for UK regulators.
