| Minimum eyewash flow | At least 0.4 gallons per minute (GPM), approximately 1.5 liters per minute, delivered to both eyes simultaneously. | Provides the minimum flushing flow specified for an eyewash under ANSI/ISEA Z358.1. |
| Flushing duration | Continuous flushing for at least 15 minutes. | A station must sustain the required flow for the full flushing period. At 0.4 GPM, that equals at least 6 gallons of water delivered. |
| Water temperature | Use tepid flushing fluid; ANSI/ISEA Z358.1 defines tepid as 60–100°F (16–38°C). | Water that is excessively hot or cold may discourage users from completing the full flush. |
| Water delivery | Provide a controlled, gentle flow that does not injure the eyes, with outlets positioned to flush both eyes at once. | Effective rinsing should not create additional injury or require the user to flush one eye at a time. |
| Activation and operation | Use a clearly identifiable, easy-to-reach actuator that starts the flow quickly and keeps it on without continuous hand pressure. | In an emergency, users may have impaired vision or limited ability to operate controls. |
| Location and access | Install the station on the same level as the hazard, in an unobstructed area, and within a 10-second travel time. | Fast, direct access is essential after a chemical splash. Assess hazards and applicable standard requirements when determining placement. |
| Plumbed eyewash station | Best suited where a dependable water supply and suitable drainage are available; verify that the installed unit delivers the required flow and duration. | A continuous supply can support extended flushing, but water quality, temperature, accessibility, and maintenance still need attention. |
| Self-contained eyewash station | Consider where plumbing is unavailable; confirm usable capacity, specified flow, flushing duration, fluid replacement schedule, and operating temperature. | Portable or self-contained equipment must be capable of providing the required flushing performance. Personal eyewash bottles are supplemental and do not replace a compliant primary station. |
| Routine readiness checks | Activate plumbed units weekly to verify operation and help clear the supply line; inspect and maintain equipment in accordance with ANSI/ISEA Z358.1 and the manufacturer’s instructions. | Regular checks help identify blocked outlets, leaks, inadequate flow, or other problems before an emergency occurs. |
| Selection decision | The best station is one that meets the applicable standard, suits the chemical hazards and site conditions, is easy to reach, and can be tested and maintained consistently. | Confirm the final selection and installation against the current standard, workplace risk assessment, and local requirements. |