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Rate of oocysts in raw and final water before and after the installation of a filtration system in Glasgow
| Period | Concentration of oocysts/10 litres | Reduction (%) | |
|---|---|---|---|
| Raw | Final | ||
| Pre-filtration | 0·004 219 | 0·001 320 | 69 |
| Post-filtration | 0·000 855 | 0·000 000 | 100 |
