COSHH Regulations: Spill Control, Storage and Compliance

COSHH regulations (Control of Substances Hazardous to Health) affect any UK workplace that stores, uses, transfers, cleans up, or disposes of hazardous substances. If your site handles oils, solvents, acids, alkalis, fluxes, cleaning chemicals, fuels, paints, resins, adhesives, coolants, batteries, or chemical waste, COSHH compliance and spill control go hand in hand. This page answers common COSHH questions with practical spill management solutions, with an emphasis on industrial sites, laboratories, warehouses, engineering, electronics manufacturing, and facilities maintenance.

Question: What are COSHH regulations and why do they matter for spill control?

Solution: COSHH is the UK framework that requires employers to prevent or adequately control exposure to hazardous substances. While COSHH is often discussed in terms of inhalation or skin contact, spills are a key exposure route because they can create vapour, aerosols, splash hazards, contaminated surfaces, and secondary spread on footwear and equipment.

Spill control supports COSHH by helping you:

• Prevent exposure by containing leaks quickly and reducing contact time.
• Control exposure by using the right absorbents and PPE matched to the substance.
• Protect the workplace by stopping slip hazards and preventing contamination of work areas.
• Protect the environment and drains, which also reduces enforcement risk and clean-up costs.

Official COSHH guidance and legal duties are provided by the HSE: HSE COSHH.

Question: Do I need COSHH assessments for small volumes and minor spills?

Solution: In practice, yes. COSHH is not just about large chemical stores. Even small volumes can cause harm if the substance is corrosive, sensitising, toxic, flammable, or environmentally damaging. A minor spill can still cause skin burns, respiratory irritation, contamination of electronics work areas, or a slip hazard in a high footfall aisle.

A proportionate COSHH assessment should identify:

• What substances are present and how they can harm people.
• Where spills could occur (delivery points, decanting, IBC taps, drum pumps, parts washers, battery charging areas).
• Who might be exposed (operators, cleaners, contractors, visitors).
• What controls are needed: bunding, drip trays, spill kits, drain protection, signage, training, and disposal arrangements.

HSE COSHH assessment guidance: COSHH assessment.

Question: How do spill kits support COSHH compliance?

Solution: A spill kit is a practical COSHH control measure for unplanned releases. It helps you act quickly to reduce exposure, stop spread, and enable safer clean-up and waste handling. For COSHH, the most important point is that the spill kit must match the likely substance and be located where spills are most likely.

Typical spill kit choices for COSHH-related spill response include:

• Oil spill kits for hydrocarbons (lubricants, hydraulic oils, cutting oils) where water repellence is useful.
• Chemical spill kits for acids, alkalis, solvents, and aggressive cleaners, using compatible absorbents.
• General purpose spill kits for non-aggressive liquids (coolants, mild detergents, water-based fluids).

For electronics and clean manufacturing areas, rapid containment reduces the risk of chemical residues, corrosion, and particulate contamination migrating into sensitive processes. Example context is covered in our spill control guidance for electronics environments: Spill Control in Electronics.

Internal product guidance: Spill Kits.

Question: What does COSHH expect for spill containment and storage areas?

Solution: COSHH expects prevention first, then control. That means designing out leaks where possible and using containment where leaks are foreseeable. In operational terms, you should consider:

• Bunding and secondary containment for drums, IBCs, chemical stores, decanting stations, and waste areas.
• Drip trays under pumps, taps, dosing points, workbenches, and parts washers to stop chronic drips becoming exposure and slip risks.
• Clearly labelled storage and segregation to reduce mixing hazards and incompatible reactions during a spill.

Bunding is not only an environmental control. It is also an exposure control because it limits spread, reduces vapour area, and keeps hazards away from walkways and workstations.

Internal links for solutions:

• Bunding and Spill Containment
• Drip Trays

Question: How do I choose the right absorbents under COSHH?

Solution: Under COSHH, absorbent selection should be based on the substance hazards, compatibility, and the clean-up method. The aim is to control exposure during the entire response: approach, containment, absorption, collection, and disposal.

Practical selection checklist:

• Identify the liquid using labels and the Safety Data Sheet (SDS). COSHH assessments should reference SDS information.
• Use chemical absorbents for unknowns or aggressive chemicals where compatibility matters.
• Use oil-only absorbents for oils when water may be present (yard spills, washdown areas).
• Use socks and booms to ring-fence and stop spread before pads and granules are applied.
• Plan for waste: saturated absorbents become hazardous waste depending on the substance.

Internal link: Absorbents and Spill Control.

Question: What about drains and watercourse protection under COSHH?

Solution: COSHH is primarily about health, but preventing hazardous substances entering drains supports both worker safety and environmental compliance. A spill that reaches a drain can create vapour hazards, reactive hazards, and significant clean-up costs, plus potential legal consequences.

Drain protection controls to consider:

• Drain covers and drain blockers for internal and external drains in spill risk zones.
• Spill berms and temporary bunds around loading bays and door thresholds.
• Site spill plans that specify where drain protection is stored and who deploys it.

Internal link: Drain Protection.

For environmental incident response expectations, see UK regulator guidance: UK pollution prevention and control guidance.

Question: What training and procedures should we have for COSHH spill response?

Solution: COSHH control measures only work if people know what to do. A practical spill response procedure should be simple, rehearsed, and matched to your hazards. At minimum, your spill response should cover:

• Alarm and isolation: stop the source if safe, isolate ignition sources for flammables, cordon off the area.
• PPE selection: gloves, eye protection, face protection, footwear, and respiratory protection where indicated by SDS/COSHH assessment.
• Containment first: use socks/booms, drip trays, or temporary bunding to prevent spread.
• Absorb and collect: apply suitable absorbents, use tools to avoid hand contact, bag and label waste.
• Decontamination: clean residues, verify the area is safe, and prevent cross-contamination into clean zones.
• Reporting and restocking: record the incident, investigate cause, replenish spill kit contents.

HSE also provides guidance on controlling exposure and training: COSHH basics.

Question: How does COSHH apply to electronics manufacturing and sensitive areas?

Solution: Electronics production often uses solvents, fluxes, conformal coatings, cleaning agents, adhesives, and battery-related chemicals. COSHH spill controls in these settings must account for both people and process risk.

Site examples of COSHH-driven spill controls in electronics and clean operations:

• Bench-level drip trays under dispensing and cleaning stations to capture small leaks before they spread.
• Local spill kits positioned inside the work cell to reduce response time and limit contamination.
• Clear segregation between chemical handling and ESD/clean zones, with dedicated clean-up tools.
• Fast containment around doorways and thresholds to stop migration into adjacent production areas.

Related reading: Spill Control in Electronics.

Question: What records and evidence help demonstrate COSHH compliance?

Solution: COSHH compliance is easier to demonstrate when your spill controls are documented, maintained, and audited. Useful evidence includes:

• Completed COSHH assessments linked to current SDS.
• Spill response procedure, including escalation and emergency contacts.
• Training records and toolbox talk attendance.
• Inspection logs for bunds, drip trays, and spill kit stock checks.
• Waste transfer notes and hazardous waste consignment notes where applicable.
• Incident and near-miss reports showing corrective actions (for example, improved containment, relocated spill kits, upgraded storage).

Question: What is the quickest way to improve COSHH spill readiness on site?

Solution: Focus on high-likelihood spill points and high-consequence substances. A practical starting plan is:

1. Map where liquids are stored, moved, and decanted.
2. Match spill kits and absorbents to each area (oil, chemical, general purpose).
3. Add secondary containment: bunding for stores, drip trays for leak points.
4. Protect drains in loading and yard areas using drain protection.
5. Train shift teams and assign responsibilities for spill response and restocking.

Explore solutions across our spill control range: Spill Control.

Need help selecting spill control for COSHH compliance?

If you want to align your COSHH assessments with practical spill containment, spill kits, absorbents, bunding, drip trays, and drain protection, use the links above to review suitable options. Choosing the correct spill control products, placing them where spills occur, and maintaining them as part of a documented system is one of the most effective ways to reduce exposure risk and strengthen compliance.