OSHA Eyewash Station Requirements: ANSI Z358.1, Placement, and Penalties

OSHA eyewash station requirements come from a single, deliberately broad regulation: 29 CFR 1910.151(c) requires employers to provide “suitable facilities for quick drenching or flushing of the eyes and body” wherever workers may be exposed to injurious corrosive materials.¹ The regulation says nothing about flow rates, water temperature, or placement distance. Those specifics come from ANSI/ISEA Z358.1-2014, an industry standard OSHA has not formally adopted but uses as the yardstick when it decides whether your equipment is “suitable.”

When You Need an Eyewash Station

The main trigger is exposure to injurious corrosive materials: substances that can burn, corrode, or permanently damage eye tissue on contact. Strong acids, caustic alkalis, and concentrated bleach solutions are the obvious examples. Your Safety Data Sheets are the starting point. If an SDS warns of corneal damage, chemical burns, or serious eye injury, you need flushing equipment where that material is used or stored.²

pH is a practical gauge. Substances at or below pH 2 or at or above pH 11 will at minimum cause significant eye irritation and may cause blindness. For strongly corrosive chemicals at or below pH 1 or at or above pH 12, ANSI recommends placing the station immediately adjacent to the hazard.

Corrosives are not the only trigger. OSHA also requires eyewash equipment in HIV and HBV research laboratories and production facilities under the Bloodborne Pathogens standard (1910.1030), and anywhere workers could be splashed with solutions containing 0.1 percent or more formaldehyde under the Formaldehyde standard (1910.1048).³ Beyond these specific standards, the General Duty Clause can reach any workplace with recognized eye hazards serious enough to cause death or substantial harm, even when a substance isn’t technically “corrosive.”

The rule applies to construction sites too, not only fixed facilities. If your crew handles injurious corrosives on a job site, you must provide flushing equipment within reach.⁴

Why ANSI Z358.1 Matters Even Though It’s Voluntary

This is where most employers get caught. OSHA’s actual regulation is one sentence. It does not spell out what “suitable” equipment looks like, and OSHA has not adopted ANSI Z358.1 as a binding federal rule.⁵ But when inspectors cite an employer for inadequate flushing equipment, the recommended corrective action is almost always to install a unit that meets ANSI Z358.1. Treating the standard as optional is a gamble most employers lose. The current edition is ANSI/ISEA Z358.1-2014.

What “Suitable” Equipment Actually Looks Like

An eyewash station must deliver a controlled, continuous stream of flushing fluid for at least 15 minutes. The minimum flow rate is 0.4 gallons per minute (about 1.5 liters per minute) for an eyewash unit, and 3.0 gallons per minute for combined eye and face wash units. The fluid must be tepid, defined as 60 to 100 degrees Fahrenheit.⁶ Water that’s too cold discourages a full 15-minute flush; water that’s too hot can worsen a chemical injury.

The activation valve must go from off to on in one second or less and stay open hands-free until someone manually shuts it off. That hands-free design matters because an injured worker will need both hands to hold their eyelids open. Nozzles need covers that keep out airborne contaminants and pop off automatically when the unit activates. The water stream must rise to a height between 33 and 53 inches from the floor and sit at least 6 inches from the nearest wall or obstruction.

Plumbed Units

Plumbed stations connect directly to the building’s water supply, so there’s no risk of running out of fluid mid-flush. The main maintenance concern is stagnant water between uses, which can harbor bacteria or sediment.

Self-Contained and Portable Units

Self-contained units hold a reservoir of flushing fluid rather than tapping into plumbing. They’re useful where running water isn’t available, including most construction environments, and they must still meet the same 0.4 gpm flow rate and 15-minute duration as plumbed stations.⁴ Sealed saline cartridges typically have about a two-year shelf life, timed from the manufacture date rather than the installation date. Small squeeze bottles of saline sold as “personal eyewash” do not satisfy 1910.151(c) on their own. They can supplement a proper station but cannot replace one.

Where the Station Has to Be

The station must be reachable within 10 seconds of walking from the hazard, which ANSI translates to roughly 55 feet.⁶ For strong acids and caustic alkalis, put it immediately adjacent, not at the end of that distance. If you handle concentrated sulfuric acid or sodium hydroxide, the eyewash belongs within arm’s reach.

The path from hazard to station must be clear. No doors requiring a key or handle, no equipment blocking the aisle, no turns an injured, partially blinded worker would struggle to navigate. The station must be on the same level as the hazard. Requiring someone with a chemical splash to climb stairs or use a ramp is not acceptable. Clear, highly visible signage should mark every location, ideally using universal symbols.

Maintenance and Recordkeeping

A station that fails when someone needs it is worse than useless, because the worker burns critical seconds before realizing they need another option. ANSI Z358.1 sets two intervals:

Weekly. Activate plumbed units long enough to confirm they work and flush stagnant water from the lines. Visually inspect self-contained units to verify fluid levels and check for damage or contamination.
Annually. Do a thorough check of every performance requirement: flow rate, water temperature, activation speed, and overall condition.⁶

Document every activation and inspection. If OSHA arrives after an incident and asks for maintenance records, “we do it but don’t write it down” will not help your case. A simple log sheet posted near each station is enough.

Training and What to Do After an Exposure

Train workers on the location and use of every station they might need. Cover how to activate the unit, the importance of flushing both eyes simultaneously, and why the full 15 minutes matters. People instinctively want to stop after a minute or two because the initial pain subsides, but chemical damage can continue well after the burning fades.

Get medical evaluation after any chemical eye exposure, even when the worker completed a full flush and feels fine. NIOSH first aid protocols call for immediate medical attention following eye contact with hazardous substances.⁷ Some chemicals cause delayed damage that only appears hours later.

Penalties for Non-Compliance

A missing or non-functional eyewash station where one is required is a citable violation. As of the penalty adjustment effective January 15, 2025, OSHA can assess up to $16,550 per serious violation. Willful or repeated violations carry penalties up to $165,514 each.⁸ These figures are adjusted annually for inflation.

Employers have been cited for providing only small squeeze bottles of saline where 15 minutes of continuous flushing was needed, with the recommended fix being equipment that meets ANSI Z358.1.⁵ The regulation itself is broad, but decades of enforcement have made the ANSI standard the practical measure of compliance.

1
Occupational Safety and Health Administration. 1910.151 – Medical Services and First Aid
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eCFR. 29 CFR 1910.151 – Medical Services and First Aid
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Occupational Safety and Health Administration. OSHA Infosheet – Eyewash Stations
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Occupational Safety and Health Administration. Eyewash and Shower Equipment in Construction
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Occupational Safety and Health Administration. ANSI Z358.1 Guidance for Complying With 1910.151(c) Citation Policy for Eyewashes and Showers
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Environmental Health & Safety University Health Services. The ANSI Z358.1-2014 Plumbed and Portable Eyewash Standard
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CDC / The National Institute for Occupational Safety and Health (NIOSH). First Aid Procedures
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Occupational Safety and Health Administration. OSHA Penalties