UV Dose for Potable Water
Required UV-C dose 40 mJ/cm² at 254 nm per WHO drinking-water guideline for log-4 viral inactivation.
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Formula, assumptions, and limits
| Symbol | Meaning | Unit |
|---|---|---|
| Lamp UV-C output | W | |
| Reactor volume | m³ | |
| UV transmittance at 254 nm |
Source: WHO Guidelines for Drinking-water Quality; NSF 55 - UV microbiological water treatment
In short
Required UV-C dose 40 mJ/cm\u00b2 at 254 nm per WHO drinking-water guideline for log-4 viral inactivation.