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CEN

CEN/TC 165/WG 50 - Use of treated wastewater

Standardisation of CEN deliverables for on site use of treated wastewater including rainwater and greywater regarding - Principles of design, construction, installation, operation and maintenance (different codes of practice for water reuse from rainwater, greywater and treated wastewater), - Quality (only parameters and test methods how to measure the quality, no threshold values) and quantity in respect of the type of end use, - Product standards (performance, test methods, structural behaviour, guide for installation) for different products, e.g. tanks, filters, controls, treatment units, infiltration units in cases where no specific material related TC or a CEN/TC 165/WG exists. Drinking water purposes are excluded from the scope.

Use of treated wastewater

Standardisation of CEN deliverables for on site use of treated wastewater including rainwater and greywater regarding - Principles of design, construction, installation, operation and maintenance (different codes of practice for water reuse from rainwater, greywater and treated wastewater), - Quality (only parameters and test methods how to measure the quality, no threshold values) and quantity in respect of the type of end use, - Product standards (performance, test methods, structural behaviour, guide for installation) for different products, e.g. tanks, filters, controls, treatment units, infiltration units in cases where no specific material related TC or a CEN/TC 165/WG exists. Drinking water purposes are excluded from the scope.

General Information

Status
Active
Work Field
Information technology
Parent
CEN/TC 165 - Waste water engineering
Standardization Organization
ICS
Directive
Mandate
50
CEN
EN 16941-1:2024(Main)
On-site non-potable water systems - Part 1: Systems for the use of rainwater
SIST EN 16941-1:2024

This document specifies the requirements and gives recommendations for the design, sizing, installation, identification, commissioning and maintenance of rainwater harvesting systems for the use of rainwater on-site as non-potable water. This document also specifies the minimum requirements for these systems.
Excluded from the scope of this document are
-   the use as drinking water and for food preparation,
-   the use for personal hygiene purposes,
-   attenuation and
-   infiltration.
NOTE   Conformity with the document does not exempt from compliance with the obligations arising from local or national regulations.

  • Standard
    39 pages
    English language
    e-Library read for
    1 day
CEN
EN 16941-2:2021(Main)
On-site non-potable water systems - Part 2: Systems for the use of treated greywater
SIST EN 16941-2:2021

This document specifies the principles of design, sizing, installation, identification, commissioning and maintenance of greywater systems with the purpose of use of greywater on-site.
It applies preferably for the use of treated greywater for:
-   WC flushing;
-   garden watering;
-   laundry;
-   cleaning purposes.
This document also specifies the minimum requirements for greywater systems.
Excluded from the scope of this document are:
-   the use as drinking water and for food preparation;
-   the use for personal hygiene purposes;
-   direct reuse systems without treatment;
-   product design for specific system components;
-   industrial effluents;
-   heat recovery and cooling demands.
NOTE   Conformity with this document does not exempt from compliance with the obligations arising from local or national regulations.

  • Standard
    30 pages
    English language
    e-Library read for
    1 day
  • Standard
    33 pages
    French language
    e-Library read for
    1 day
CEN
prEN 18247-1(Main)
Performance testing of on-site non-potable water systems - Part 1: Greywater systems
oSIST prEN 18247-1:2025

This document specifies the testing conditions to assess the treatment performances of greywater systems.
Excluded from the scope of this document are:
-   the testing of rainwater harvesting systems;
-   the testing of systems for direct use as mentioned in EN 16941–2 "On-site non-potable water systems - Part 2: Systems for the use of treated greywater";
-   the testing of blackwater treatment systems;
-   the testing of wastewater treatment plant.

  • Draft
    27 pages
    English language
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    1 day
CEN
EN 16941-1:2018(Main)
On-site non-potable water systems - Part 1: Systems for the use of rainwater
SIST EN 16941-1:2018

This European Standard specifies the requirements and gives recommendations for the design, sizing, installation, identification, commissioning and maintenance of rainwater harvesting systems for the use of rainwater on-site as non-potable water. This European Standard also specifies the minimum requirements for these systems.
Excluded from the scope of this European Standard are:
- the use as drinking water and for food preparation;
- the use for personal hygiene purposes;
- decentralized attenuation;
- infiltration.
NOTE   Conformity with the standard does not exempt from compliance with the obligations arising from local or national regulations.

  • Standard
    35 pages
    English language
    e-Library read for
    1 day
50

Frequently Asked Questions

CEN/TC 165/WG 50 is a Working Group within the European Committee for Standardization (CEN). It is named "Use of treated wastewater" and is responsible for: Standardisation of CEN deliverables for on site use of treated wastewater including rainwater and greywater regarding - Principles of design, construction, installation, operation and maintenance (different codes of practice for water reuse from rainwater, greywater and treated wastewater), - Quality (only parameters and test methods how to measure the quality, no threshold values) and quantity in respect of the type of end use, - Product standards (performance, test methods, structural behaviour, guide for installation) for different products, e.g. tanks, filters, controls, treatment units, infiltration units in cases where no specific material related TC or a CEN/TC 165/WG exists. Drinking water purposes are excluded from the scope. This committee has published 4 standards.

CEN/TC 165/WG 50 develops CEN standards in the area of Information technology. The scope of work includes: Standardisation of CEN deliverables for on site use of treated wastewater including rainwater and greywater regarding - Principles of design, construction, installation, operation and maintenance (different codes of practice for water reuse from rainwater, greywater and treated wastewater), - Quality (only parameters and test methods how to measure the quality, no threshold values) and quantity in respect of the type of end use, - Product standards (performance, test methods, structural behaviour, guide for installation) for different products, e.g. tanks, filters, controls, treatment units, infiltration units in cases where no specific material related TC or a CEN/TC 165/WG exists. Drinking water purposes are excluded from the scope. Currently, there are 4 published standards from this working group.

The European Committee for Standardization (CEN) is a public standards organization that brings together the national standardization bodies of 34 European countries. CEN provides a platform for developing European Standards (ENs) and other technical documents in relation to various products, materials, services, and processes, supporting the European Single Market.

A Working Group in CEN is a specialized group responsible for developing standards or technical work within a defined scope. These bodies bring together international experts to create consensus-based standards that support global trade, safety, and interoperability.