An eyewash station is used to flush hazardous chemicals, dust, or debris from your eyes immediately after exposure. These stations deliver a gentle, continuous stream of water or saline solution to both eyes at once, washing away corrosive or irritating substances before they can cause lasting damage. The faster you begin flushing, the better the outcome, which is why federal workplace safety rules require these stations to be within 10 seconds of any area where corrosive chemicals are handled.
Why Immediate Flushing Matters
When a corrosive chemical like an acid or alkali splashes into your eye, it begins damaging tissue on contact. The goal of an eyewash station is to dilute and remove that chemical as quickly as possible. Even a delay of a few seconds can mean the difference between temporary irritation and permanent vision loss. That’s why the standard flushing time is a full 15 minutes of continuous flow to both eyes, not a quick rinse.
Eyewash stations aren’t just for dramatic chemical spills. They’re also used for flushing out fine particulates like metal shavings, sawdust, or biological material that gets into the eyes during routine work. Any situation where rubbing your eyes would make things worse is a situation where an eyewash station is the right first response.
Where Eyewash Stations Are Required
OSHA’s standard (29 CFR 1910.151(c)) is clear: any workplace where a person’s eyes or body could be exposed to “injurious corrosive materials” must have suitable flushing equipment available for immediate emergency use. The employer is responsible for reviewing the safety data sheets for every chemical on site and determining whether eyewash protection is necessary. If none of the materials qualify as injurious corrosives, a station isn’t legally required, but many workplaces install them anyway as a precaution.
You’ll commonly find eyewash stations in laboratories, manufacturing plants, construction sites, auto shops, hospitals, schools with chemistry labs, and anywhere batteries are serviced (battery acid is a frequent culprit). Some agriculture operations also require them when pesticide labels mandate eye protection.
Placement Rules
An eyewash station that’s locked in a closet down the hall won’t help anyone. ANSI Z358.1, the industry standard that governs these devices, requires stations to be no more than 55 feet (roughly 10 seconds of walking) from the hazard. They must be on the same floor as the hazard, along an unobstructed path with no locked doors, stairs, or clutter in the way. The idea is that someone with impaired vision, possibly in pain, should be able to reach the station almost instinctively.
Plumbed vs. Portable Stations
There are two main types, and they work differently.
Plumbed eyewash stations connect directly to a building’s water supply. They deliver at least 0.4 gallons per minute of tepid water (between 60°F and 100°F) for a minimum of 15 minutes. Because they tap into a continuous water source, they never run dry. They include a drain and are typically mounted near sinks or on walls in labs and industrial areas. The water temperature matters more than you might think: water that’s too cold makes it nearly impossible for someone to keep their eyes open under the stream for the full 15 minutes, and water that’s too hot can cause additional injury.
Portable (self-contained) eyewash stations carry their own supply of flushing fluid, usually potable water treated with a preservative or a sterile saline solution. Saline is generally preferred because its pH closely matches natural tears, making it gentler on damaged eyes. These units are useful in locations where plumbing isn’t available, like outdoor job sites or remote work areas. The tradeoff is that they hold a limited supply of fluid and require more hands-on maintenance. You should never activate a portable unit just to test it, because doing so depletes the flushing solution that someone might need in an actual emergency.
How to Use an Eyewash Station
If you get a chemical or foreign substance in your eyes, go to the nearest eyewash station immediately. Activate it by pushing the lever, plate, or foot pedal, depending on the model. Most stations are designed so you can operate them with one hand, since your other hand may be covering your face.
Once the water is flowing, hold your eyes open as wide as possible. This is the hardest part, because your natural reflex is to squeeze them shut. Use your fingers to keep both eyelids pulled apart so the water reaches every surface around the eye. While flushing, roll your eyes back and forth to expose as much of the eye surface as you can. Keep in mind that both eyes move together, so even if only one eye was splashed, keep the other eye under the stream too.
Continue flushing for at least 15 minutes. That will feel like a long time, especially if you’re in pain, but cutting it short can leave residual chemical on the eye surface. After flushing, seek medical attention. The eyewash station is a first response, not a complete treatment.
Maintenance and Contamination Risks
An eyewash station that hasn’t been maintained can introduce new problems. Research published in the American Journal of Infection Control found significant increases in bacterial contamination in eyewash stations where water had been sitting for more than a day. Bacteria like Enterobacter and Mycobacterium were found in high concentrations in stations with prolonged stagnant water. Flushing contaminated water into an already injured eye could cause a serious infection on top of a chemical burn.
To prevent this, plumbed eyewash stations need to be activated weekly. Running the water for a few seconds clears out rust, mineral deposits, and bacteria that build up in the pipes. This isn’t optional: it’s part of the ANSI standard. Portable units require a weekly visual inspection and full replacement of the flushing solution when it expires, typically every six months. If you work near an eyewash station, take a moment to check whether it looks like it’s been tested recently. Many stations have a tag or log where activation dates are recorded. If the last date was months ago, that’s worth flagging to your supervisor.