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Safety shower or eye wash station? How to choose for your site

9 Nov 2026

If a chemical splashes into someone's eyes, they need an eye wash station. If it soaks their clothes or skin, they need a safety shower. Many sites need both, and choosing the wrong one leaves a gap that only shows up on the worst day.

This guide explains the difference, how to decide what your site needs and which type of unit suits each situation.

Eye wash station vs safety shower: the difference

  • Eye wash station: two gentle, low-pressure jets that rinse both eyes at the same time. Designed for splashes of chemicals, dust or debris to the eyes and face.
  • Safety shower (drench shower): a high-volume flow from overhead that drenches the whole body. Designed for larger spills onto clothing and skin, or for putting out burning clothing.

They are not interchangeable. A shower's flow is far too strong to hold your eyes open under, and an eye wash cannot decontaminate a person whose overalls are soaked with acid.

How to decide what your site needs

In the UK there is no single rule that says "every workplace needs a safety shower". The decision comes from your risk assessment. Under the Control of Substances Hazardous to Health Regulations 2002 (COSHH), employers must assess the substances in use and put arrangements in place for accidents and emergencies, including first aid.

Ask three questions for each work area:

  1. Can a substance reach the eyes? Decanting, mixing, pouring or any work with liquids, powders or dust under pressure. If yes, you need eye wash provision.
  2. Can a substance reach a large area of skin or clothing? Handling corrosives, filling or emptying containers, battery charging, work with drums or IBCs. If yes, you need a safety shower.
  3. Is there a plumbed water supply nearby? If not, a portable, self-contained unit may be the practical option.

The safety data sheet (section 4, first-aid measures) for each substance tells you whether eye or skin contact needs prolonged rinsing. Use it as the starting point.

The figures that matter

The two standards most used to specify emergency equipment are EN 15154 in Europe and ANSI/ISEA Z358.1 in the US. Many UK specifications reference both. The key points:

Point What to aim for
Rinsing time At least 15 minutes of continuous flow, so the supply must not run out.
Shower flow ANSI Z358.1: at least 75.7 litres per minute. EN 15154-1: 60 litres per minute where no national rule applies.
Eye wash flow ANSI Z358.1: at least 1.5 litres per minute, gentle enough not to hurt the eyes.
Water temperature Tepid, between 16 and 38 °C. Very cold water stops people rinsing for long enough.
Location Reachable in about 10 seconds from the hazard, on the same level, with no doors or stairs in the way.
Activation Opens in one movement and stays open hands-free, so the injured person can use both hands.

Which type of unit for which situation

  • Eye wash only: laboratories, workshops and cleaning stores where splashes are small. Choose a wall-mounted eye wash station where floor space is tight, or a pedestal unit where the wall is not suitable.
  • Safety shower only: areas where the main risk is a body splash and eye wash is already provided close by. A wall-mounted emergency shower with pull rod delivers 120 litres per minute at 3 bar and fits where a free-standing unit would be in the way.
  • Combined shower and eye wash: chemical stores, battery charging areas, plant rooms and production lines, where either type of exposure can happen. One combined emergency shower and eye wash station covers both, with a pull handle for the shower (120 l/min) and a side lever for the eye wash (14 l/min).
  • Portable eye wash: construction sites, vehicle depots and temporary work areas without a plumbed supply. A portable eye wash station with an 18-litre pressurised tank can be placed where the risk is.

For corrosive substances, workshops and outdoor areas, choose stainless steel versions: they resist impacts and chemicals better than plastic and last longer.

Common mistakes

  • Relying on eye wash bottles alone. Bottles are useful for a quick first rinse or where there is no water supply, but they cannot deliver 15 minutes of flushing.
  • Placing the unit too far away, or behind a door, so it takes far longer than 10 seconds to reach while someone cannot see.
  • Forgetting the drain. A shower running at over 100 litres per minute for 15 minutes produces well over a tonne of water. Plan where it goes.
  • Never testing the unit. See our eye wash station inspection checklist for the weekly and annual checks.

All NOFER emergency eye wash stations and safety showers are tested to EN 15154 and ANSI/ISEA Z358.1, and spare parts are available for every model. See the full range of emergency eye wash stations and safety showers.

Not sure which unit you need? Send us the substances involved and a rough layout of the area, and we will suggest the right equipment. Get a trade quote.

This guide is general information to help you plan. It does not replace your own COSHH risk assessment, the safety data sheets for the substances you use, or the instructions supplied with your equipment.