To use a safety shower, step under the shower head, pull the activation handle, and flush the affected area for a minimum of 15 minutes. The valve is designed to stay open on its own so you can use both hands to remove contaminated clothing and keep the water flowing over exposed skin. Every second counts during a chemical exposure, so knowing these steps before an emergency happens is critical.
Step-by-Step: Using a Safety Shower
Get to the nearest shower as quickly as possible. Safety showers should be within 55 feet of any chemical hazard, which translates to roughly 10 seconds of walking. The path should be on the same level as the hazard with no stairs or obstructions.
Pull the handle or push the activation lever. The valve is engineered to open in one second or less and stay open without you holding it. This hands-free design exists for a reason: you need both hands free to deal with contaminated clothing and keep water flowing over your skin or eyes.
While the water is running, remove any clothing the chemical has contacted. Don’t wait until after you’ve finished rinsing. Contaminated fabric trapped against your skin continues to expose you, so pulling it off immediately is part of the flushing process, not something you do afterward. Shoes, gloves, jewelry, and watches can all trap chemicals underneath.
Stay under the water for at least 15 full minutes. This feels like a long time, especially when the adrenaline is pumping, but cutting the rinse short can leave residual chemical on your skin and worsen the injury. Have a coworker call emergency services while you’re flushing so you don’t have to choose between rinsing and getting help. After the full 15 minutes, seek medical attention even if the affected area looks or feels fine.
Using a Combined Shower and Eyewash Station
Many safety showers include a built-in eyewash at waist height. If a chemical has splashed both your body and your eyes, you can activate both at the same time. Step under the shower, pull the main handle, then open the eyewash bowl and position your face over the streams. Use your fingers to hold your eyelids open. The instinct to clamp your eyes shut is strong, but flushing only works if water actually reaches the surface of the eye.
Each component of a combination unit is designed to meet its own performance standard independently. The shower head delivers at least 20 gallons per minute at a gentle enough velocity that it won’t hurt you, while the eyewash delivers a separate stream to both eyes. Both must be capable of sustaining flow for the full 15-minute minimum.
Why Water Temperature Matters
Safety shower water should be tepid, defined as between 60°F and 100°F (16°C to 38°C). This range exists to protect you from two problems. Water above 100°F can damage your eyes and actually speed up chemical reactions on your skin, making the exposure worse. Water below 60°F risks hypothermia during a 15-minute rinse and makes people far more likely to step out of the shower too early.
If you activate a safety shower and the water feels ice cold, stay under it anyway. A chemical burn will cause more damage than cold water. But if you’re responsible for maintaining showers in your workplace, checking the water temperature regularly can prevent this situation.
Know the Location Before You Need It
The single biggest factor in whether a safety shower does its job is how quickly you reach it. Current standards require showers to be within 55 feet of any point where someone could be exposed to corrosive materials. That 55-foot requirement applies regardless of what personal protective equipment workers are wearing.
The path between the hazard and the shower must be completely clear. No boxes stacked nearby, no equipment blocking the aisle, no doors that require a key. If a shower is located around a corner, down a hallway, or on a different floor, it’s too far. Walk the route from your workstation to the nearest shower before you ever handle a chemical. In an emergency, you may not be able to see clearly, so knowing the path by feel and by step count matters.
Testing and Maintenance
OSHA recommends testing safety showers at regular intervals to make sure they work when you need them. While no specific federal frequency is mandated, most facilities follow the ANSI standard of activating every plumbed shower weekly. This brief activation clears stagnant water from the pipes and confirms that the valve opens properly and the water flows. A more thorough annual inspection checks flow rate, water temperature, and the condition of the shower head and piping.
If you pull the handle during a weekly test and the water trickles out, smells foul, or looks discolored, report it immediately. A shower that technically exists but doesn’t deliver clean water at the right volume and temperature is not a functioning safety shower. The standard calls for a minimum of 20 gallons per minute sustained for 15 minutes, which means the plumbing behind the wall has to support a serious volume of water.
What Happens After the Rinse
Completing the 15-minute flush is the first step, not the last. Even if your skin looks normal or the pain has faded, some chemicals cause delayed damage that only becomes apparent hours later. Get a medical evaluation after every safety shower use. Bring the Safety Data Sheet for the chemical involved if possible, since it tells medical staff exactly what you were exposed to and what treatment is appropriate.
Do not apply creams, ointments, or neutralizing agents to the affected area unless specifically directed by medical personnel. Water is the universal first response for chemical exposure. Adding other substances can trap heat, trigger additional reactions, or make it harder for a doctor to assess the injury.