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BSI BS EN 12255-2:2026

Wastewater treatment plants -- Storm water management systems
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BSI BS EN 12255-2:2026

Wastewater treatment plants -- Storm water management systems

PUBLISH DATE 2026
PAGES 18
BSI BS EN 12255-2:2026

This document specifies requirements for storm water management systems on wastewater treatment plants. It does not refer to storm water management systems in wastewater collection and conveyance networks (sewer systems).

Regardless of the location and the technical requirements of this document, storm water management systems can be regarded as part of the sewer system in accordance with EN 752 and EN 16933.

This document specifies requirements for separation, storage, treatment, discharge and return of storm water within wastewater treatment plants.

NOTE A storm water management system at the wastewater treatment plant is only required where such a system is not provided within the sewer system, limiting the flow to the wastewater treatment plants; see EN 752 and EN 16933 (all parts).

SDO BSI: British Standards Institution
Document Number EN 12255-2
Publication Date July 23, 2026
Language en - English
Page Count 18
Revision Level
Supercedes
Committee B/505/40
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