Garage

Organophosphate pesticides inhibit acetylcholinesterase, the enzyme that breaks down the neurotransmitter acetylcholine. At residential levels, the concern is chronic low-level neurological effects, particularly in children. Glyphosate, the active ingredient in Roundup, is classified as a probable human carcinogen by the IARC.

Dispose of all unused pesticides through local hazardous waste collection. Switch to manual weeding, steam treatment, or iron phosphate slug pellets.

Many local councils have annual hazardous waste collection events. Store current pesticides in original sealed containers in a locked, ventilated outbuilding, not the attached garage.

Petrol vapour is a mixture of hydrocarbons including benzene, a known human carcinogen. Petrol stored in the garage off-gases continuously, particularly in warm conditions. Attached garages allow these vapours to enter the home.

Store petrol in approved containers in a detached outbuilding only; minimise volume kept on-site; never store in the home

If a detached outbuilding is not available, store petrol cans outside in a shaded, ventilated location. The recommended maximum for home storage in the UK is 30 litres in approved containers.

Many car cleaning products contain glycol ethers, chlorinated solvents and strong surfactants. These are typically used in enclosed or semi-enclosed spaces and generate inhalation exposure during spray application.

Wear nitrile gloves when using any car cleaning product; use in open air only; choose water-based formulations

A simple bucket of water with a small amount of plant-based dish soap is effective for routine car washing and contains no solvents.

Stored paint tins and solvents off-gas continuously, even when sealed. An attached garage used for paint storage exposes the household to elevated VOC levels via air movement between the garage and living areas.

Dispose of old paint and solvents through hazardous waste collection. Store remaining quantities in sealed metal containers in a detached outbuilding.

Local recycling centres accept old paint. Community RePaint schemes accept useable paint for redistribution.

Used motor oil contains PAHs from combustion, including benzo[a]pyrene, a known human carcinogen. Skin contact with used motor oil during oil changes is a significant exposure route.

Wear nitrile gloves for all motor oil handling; dispose of used oil at a licensed collection point; never pour motor oil on ground or in drains

Most garages and motor factors accept used motor oil free of charge. UK recycling centres also accept it.

Ethylene glycol is acutely toxic when ingested and moderately toxic via skin absorption and inhalation. Its sweet taste makes it a hazard for children and pets. Antifreeze stored or spilled in the garage is a contamination risk for groundwater.

Store in original sealed containers in a locked cabinet; use propylene glycol antifreeze where possible (lower toxicity)

Propylene glycol antifreeze is marketed as pet-safe antifreeze and carries a significantly lower acute toxicity profile.