CEN/TC 165
| Registration number (WIID) | Project No. | Title | Status |
|---|---|---|---|
| 69386 | EN 12255-13:2023 | Wastewater treatment plants - Part 13: Chemical treatment - Treatment of wastewater by precipitation/flocculation | Izstrādē |
| 7253 | EN 12255-14:2003 | Wastewater treatment plants - Part 14: Disinfection | Atcelts |
| 69390 | EN 12255-14:2023 | Wastewater treatment plants - Part 14: Disinfection | Izstrādē |
| 7281 | EN 12255-15:2003 | Wastewater treatment plants - Part 15: Measurement of the oxygen transfer in clean water in aeration tanks of activated sludge plants | Izstrādē |
| 7280 | EN 12255-16:2005 | Wastewater treatment plants - Part 16: Physical (mechanical) filtration | Atcelts |
| 66080 | EN 12255-16:2021 | Wastewater treatment plants - Part 16: Physical (mechanical) filtration | Izstrādē |
| 7236 | EN 12255-3:2000 | Wastewater treatment plants - Part 3: Preliminary treatment | Atcelts |
| 20826 | EN 12255-3:2000/AC:2000 | Wastewater treatment plants - Part 3: Preliminary treatment | Atcelts |
| 69387 | EN 12255-3:2024 | Wastewater treatment plants - Part 3: Preliminary treatment | Standarts spēkā |
| 7237 | EN 12255-4:2002 | Wastewater treatment plants - Part 4: Primary settlement | Atcelts |
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