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General ranges of UVT254 for various water sources. Used with permission of John Wiley & Sons. [220].
| Water Source | UVT254 |
|---|---|
| Raw, untreated surface water | <45% |
| Unfiltered, secondary effluent | 45–65% |
| Tertiary filtered wastewater | 55–75% |
| Drinking water | 70–98% |
