Marchwood Scientific Services Limited

Marchwood Scientific Services Limited is a specialist independent analytical testing laboratory based near Southampton, England, operating as a member of the Cawood Scientific group since 2020. Cawood is the UK's largest independent provider of analytical testing for land-based and industrial sectors, and Marchwood functions as its flagship centre for environmental emissions analysis, persistent organic pollutant screening, food and feed contaminant testing, and occupational hygiene monitoring. With a history spanning over three decades at its Southampton facility, Marchwood has established itself as one of the most technically advanced specialist laboratories in the United Kingdom, serving clients across the energy, waste management, food safety, environmental compliance, and industrial hygiene sectors from laboratories in both the South and North of England.

Stack emissions testing is the cornerstone of Marchwood's service portfolio. The laboratory holds MCERTS accreditation — the UK Environment Agency's quality assurance scheme for environmental monitoring — for a comprehensive suite of stack emission analyses. Services cover particulate matter, heavy metals, mercury, acidic vapours, ammonia, volatile organic compounds (VOCs), polycyclic aromatic hydrocarbons (PAHs), chlorinated dioxins and furans, polychlorinated biphenyls (PCBs), and brominated dioxins. Operators of energy-from-waste plants, commercial incinerators, cement kilns, and industrial combustion installations rely on Marchwood to demonstrate compliance with the Industrial Emissions Directive (IED) and Environment Agency (EA) permit conditions. The laboratory's purpose-built stacks facility offers a rapid seven-working-day analytical turnaround, significantly reducing the compliance burden for regulated plant operators.

Marchwood is recognised as the UK's leading laboratory for dioxins and furans analysis, holding long-standing UKAS ISO 17025 accreditation for polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/F) testing in stack emissions matrices. Sampling is conducted in accordance with BS EN 1948 and US EPA Method 23 using isokinetic sampling trains. Analysis is performed by high-resolution gas chromatography–mass spectrometry (HR-GC/MS) utilising a Thermo Scientific Dual Focus Spectrometer (DFS), one of the most sensitive instruments available for ultra-trace level dioxin determination. In March 2026, Marchwood became the first laboratory in the United Kingdom to achieve UKAS accreditation for brominated dioxins and furans analysis in stack emissions — an analytical method Marchwood pioneered in-house from January 2023, when new EA legislation first required commercial incinerators to test for brominated dioxins twice annually. Brominated dioxins analysis can be undertaken as a standalone service or co-sampled alongside chlorinated dioxins and PCBs from a single sampling train, offering clients meaningful time and cost efficiencies while maintaining full regulatory compliance.

Beyond emissions, Marchwood provides accredited analytical services for food and feed safety, covering a broad range of persistent organic pollutants (POPs) and regulated environmental contaminants. Testing capabilities include dioxins, furans, and non-ortho and mono-ortho PCBs in food and animal feed matrices; pesticide residues in food; mycotoxins; PAHs; heavy metals; and fluoride. All food and feed contaminant tests are conducted under UKAS ISO 17025 accreditation, with a standard ten-day turnaround that can be expedited for time-sensitive positive-release requirements. This service supports food manufacturers, importers, supermarket supply chains, and feed producers in meeting European Union and UK maximum residue limits (MRLs) and maximum levels (MLs) for regulated contaminants.

Marchwood also delivers specialist analytical testing for waste-derived and alternative fuels, directly supporting the UK's growing energy recovery sector. Testing covers Refuse Derived Fuel (RDF) and Solid Recovered Fuel (SRF) classification to EN 15359, with proximate analysis (moisture, ash content, volatile matter), ultimate analysis (carbon, hydrogen, nitrogen, sulphur, oxygen), gross and net calorific value determination, biomass content by acid dissolution, and loss on ignition. UKAS accreditation scope has been extended to include loss on ignition and biomass determination by calorific value and total carbon, allowing waste processors, energy-from-waste operators, and fuel brokers to meet quality compliance and sustainability reporting requirements with independently verified data.

Occupational hygiene analysis represents a further specialist capability at Marchwood. The laboratory is the UK's leading independent specialist in occupational hygiene analytical services, providing workplace air monitoring analysis that supports compliance with the Control of Substances Hazardous to Health (COSHH) Regulations. Analytical scope covers a wide range of workplace chemical contaminants, enabling occupational hygienists, health and safety professionals, and employers across industry to assess worker exposure against UK Workplace Exposure Limits (WELs) set by the Health and Safety Executive.

Marchwood's combination of pioneering analytical development, multi-scope UKAS ISO 17025 accreditation, and MCERTS certification for stack emissions positions it as a uniquely credible testing partner for clients who require regulatory acceptance of their data. As part of the Cawood Scientific group — itself a member of Ensign-Bickford Industries' Agriculture and Environmental Diagnostics Group since 2021 — Marchwood benefits from sustained investment in state-of-the-art instrumentation and technical capability. Its demonstrated track record of being first to develop and deliver analytically challenging new services, including brominated dioxins testing before any other UK laboratory, reflects the depth of scientific expertise available across its environmental, food safety, occupational, and energy recovery service lines.