CEN/TR 17801:2022

Guidelines for water safety plan concept in buildings

This document describes a method for the analysis, evaluation and management of risks that exist or may arise from the use of potable water installations within buildings and, for certain purposes, outside buildings but within the premises. Water Safety Plans for potable water supply systems are excluded from the scope of this document.
The document is addressed to all organisations and other stakeholders which are responsible for providing potable water within a safe potable water installation inside buildings according to EN 806, EN 1717 and national regulations.

Leitfaden für die Umsetzung des Water Safety Plan Konzeptes in Gebäuden

Dieses Dokument beschreibt eine Methode für die Analyse, Bewertung und Beherrschung von Risiken, die bei der Nutzung von Trinkwasser-Installationen innerhalb von Gebäuden und, für bestimmte Zwecke, außerhalb von Gebäuden, aber innerhalb des Geländes vorliegen oder entstehen können. Wassersicherheitspläne für Trinkwasserversorgungssysteme sind vom Anwendungsbereich dieses Dokuments ausgeschlossen.
Dieses Dokument richtet sich an alle Organisationen und andere Beteiligte, die für die Bereitstellung von Trinkwasser im Rahmen einer sicheren Trinkwasser-Installation innerhalb von Gebäuden nach EN 806, EN 1717 und nationalen Vorschriften verantwortlich sind.

Lignes directrices relatives au plan de gestion de la sécurité sanitaire de l’eau dans les bâtiments

Le présent document décrit une méthode d’analyse, d'évaluation et de gestion des risques existants ou pouvant découler de l’utilisation d’installations d’eau potable à l’intérieur des bâtiments et, dans certains cas, à l’extérieur des bâtiments mais dans les locaux. Les plans de gestion de la sécurité sanitaire de l’eau pour les réseaux d’alimentation en eau potable sont exclus du domaine d’application du présent document.
Le document s’adresse à tous les organismes et autres parties prenantes responsables de fournir de l’eau potable dans une installation d’eau potable salubre à l’intérieur des bâtiments conformément à l’EN 806, l’EN 1717 et les réglementations nationales.

Smernice za zasnovo načrta vodne varnosti v stavbah

Ta dokument opisuje metodo za analizo, vrednotenje in obvladovanje tveganj, ki obstajajo ali se lahko pojavijo pri uporabi napeljav za pitno vodo v stavbah in, za določene namene, zunaj
stavb, vendar v okviru prostorov. Načrti vodne varnosti za sisteme oskrbe s pitno vodo ne spadajo
na področje uporabe tega dokumenta.
Ta dokument je namenjen vsem organizacijam in drugim deležnikom, ki so odgovorni za zagotavljanje pitne vode v okviru varne napeljave za pitno vodo v stavbah v skladu s standardoma EN 806
in EN 1717 ter nacionalnimi predpisi.

General Information

• Status: Published
• Publication Date: 15-Feb-2022
• ICS: 13.060.20 - Drinking water
• ICS: 91.140.60 - Water supply systems
• Technical Committee: CEN/TC 164 - Water supply
• Drafting Committee: CEN/TC 164/WG 2 - Internal systems and components
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 16-Feb-2022
• Due Date: 26-Dec-2022
• Completion Date: 16-Feb-2022
• Directive: 98/83/EC - Quality of water intended for human consumption
• Ref Project: SIST-TP CEN/TR 17801:2022 - Guidelines for water safety plan concept in buildings

Overview

CEN/TR 17801:2022 - Guidelines for water safety plan concept in buildings - provides a practical, risk‑based method for analyzing, evaluating and managing risks from the use of potable water installations inside buildings (and, for some purposes, on the same premises). It focuses on Water Safety Plans (WSPs) scoped to building installations (not whole supply systems) and supports process‑oriented risk management consistent with EN 15975‑2 and the EU Recast Drinking Water Directive (2020/2184/EU). The report targets organizations responsible for safe potable water within buildings in line with EN 806, EN 1717 and national regulations.

Key Topics

• WSP process and modules: flowchart of WSP elements including system description, risk assessment, risk control, verification and revision.
• Assembling the WSP team: roles and stakeholders (e.g., planners, installers, operators, facility managers, hygiene/responsible persons, health authority representatives).
• System description: technical description, preliminary interviews, inventory documentation and piping schemes to capture as‑built and operating conditions.
• Hazard identification: microbial (e.g., Legionella, Pseudomonas), chemical (e.g., leaching from materials), physical (temperature, pressure) and organoleptic hazards (taste, odor, turbidity).
• Risk assessment and prioritization: evaluating likelihood and severity of hazardous events for potable water installations.
• Risk control measures: selection, monitoring, validation and definition of corrective actions for control measures.
• Verification and revision: routine confirmation that objectives are met and that the WSP remains effective over time.
• Inventory and site inspection: guidance for documentation, site visits and assessments that underpin hazard analysis.

Applications

CEN/TR 17801:2022 is practical for:

• Building owners, facility managers and building administrators developing a Water Safety Plan for internal potable water installations.
• Designers, installers and contractors documenting system descriptions and piping schemes to support WSPs.
• Operators, maintainers and hygiene officers implementing monitoring, validation and corrective actions.
• Public health and regulatory bodies reviewing building WSPs and compliance with EN 806 / EN 1717 and national rules.

Typical use cases include hospitals, schools, residential complexes, retirement homes, sports facilities and commercial buildings where internal water quality control (including Legionella risk management) and continuity of safe supply are critical.

Related standards

• EN 806 (installations inside buildings conveying water for human consumption)
• EN 1717 (protection against backflow)
• EN 15975‑2 (process‑oriented risk management for water supplies)
• EU Recast Drinking Water Directive 2020/2184

Keywords: CEN/TR 17801:2022, Water Safety Plan, potable water installation, risk assessment, Legionella, EN 806, EN 1717, building water safety.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2022
Smernice za zasnovo načrta vodne varnosti v stavbah
Guidelines for water safety plan concept in buildings
Leitfaden für die Umsetzung des Water Safety Plan Konzeptes in Gebäuden
Lignes directrices pour concevoir des plan de sécurité pour l'eau dans les bâtiments
Ta slovenski standard je istoveten z: CEN/TR 17801:2022
ICS:
91.140.60 Sistemi za oskrbo z vodo Water supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

CEN/TR 17801
TECHNICAL REPORT
RAPPORT TECHNIQUE
February 2022
TECHNISCHER BERICHT
ICS 13.060.20; 91.140.60
English Version
Guidelines for water safety plan concept in buildings
Lignes directrices relatives au plan de gestion de la Leitfaden für die Umsetzung des Water Safety Plan
sécurité sanitaire de l'eau dans les bâtiments Konzeptes in Gebäuden

This Technical Report was approved by CEN on 24 January 2022. It has been drawn up by the Technical Committee CEN/TC 164.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. CEN/TR 17801:2022 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Symbols and abbreviations . 7
5 Modules and process of the WSP . 8
5.1 Flowchart and elements of the Water Safety Plan . 8
5.2 Assembling WSP-Team . 9
5.3 System description . 9
5.3.1 Technical description . 9
5.3.2 Preliminary talk . 10
5.3.3 Inventory documentation . 11
5.4 System assessment . 12
5.4.1 Identify Hazards and hazardous events . 12
5.4.2 Assess and prioritize risks . 13
5.4.3 Results of the risk assessment . 15
5.5 Controlling risks . 15
5.5.1 Determination of measures . 15
5.5.2 Monitoring of measures . 15
5.5.3 Define corrective actions . 16
5.5.4 Validation of measures . 16
6 Verification . 17
7 Revision . 17
Annex A (informative) Supplement to the inventory documentation . 18
Bibliography . 19

European foreword
This document (CEN/TR 17801:2022) has been prepared by Technical Committee CEN/TC 164 “Water
supply”, the secretariat of which is held by AFNOR.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
Introduction
This document describes the elements and the procedure of the Water Safety Plan for potable water
installations inside buildings and, for certain purposes, outside buildings but within the premises. The
Water Safety Plan is a risk-based management approach, which aims to provide safe potable water at the
point of consumption of the potable water installation. In order to achieve this goal, the Water Safety Plan
includes a method for the analysis, evaluation and control of risks, which are described in this document
as a combination of likelihood and severity of impact of hazard and hazardous events and which are
present or may arise in the context of the use of potable water installations.
The Water Safety Plan described in this document is based on the principles of process-oriented risk
management outlined in EN 15975-2 for potable water supply systems and it supports the European
Union Recast Drinking Water Directive 2020/2184/EU [1].
1 Scope
This document describes a method for the analysis, evaluation and management of risks that exist or may
arise from the use of potable water installations within buildings and, for certain purposes, outside
buildings but within the premises. Water Safety Plans for potable water supply systems are excluded
from the scope of this document.
The document is addressed to all organisations and other stakeholders which are responsible for
providing potable water within a safe potable water installation inside buildings according to EN 806,
EN 1717 and national regulations.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 806-1, Specifications for installations inside buildings conveying water for human consumption - Part 1:
General
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 806-1 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at https://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
3.1
Water Safety Plan
approach to ensure the safety of potable water through the use of a comprehensive risk assessment and
risk management that encompasses all steps in water supply from catchment to consumer. For the
purpose of this technical report, WSP is limited to potable water installations within buildings and, for
certain purposes, outside buildings but within the premises
[SOURCE: EN 806-1, definition Figure 1]
3.2
likelihood of occurrence
chance of a hazardous event happening, whether defined, measured or determined objectively or
subjectively, qualitatively or quantitatively, and described using general or mathematical terms (such as
a probability or a frequency over a given time period)
3.3
building
structure that includes rooms, can be entered and serves the stay and residence of people, animals or the
storage of things. It includes also structures intended for commercial and industrial uses
3.4
hazard
biological, chemical, physical or radiological agents in water, or condition (aerosol, steam, etc.) of water,
with the potential to cause harm to public health
Note 1 to entry: Condition includes quantity.
3.5
hazard analysis
systematic identification of hazards to human health and of events or situations that may lead to the
occurrence of a hazard to human health from a potable water installation, taking into account:
— The description of the potable water installation;
— The observations made during the site visit;
— The identified deviations from the legal and normative requirements;
— The other knowledge about the water quality, the potable water installation and its use;
— The laboratory results and their local correlation
3.6
hazardous event
event that introduces hazards to potable water installations, or fails to remove them from the potable
water installation
3.7
corrective action
action to eliminate the cause of a non-conformity (non-fulfilment of a nominal condition ) and to prevent
recurrence
3.8
risk control measure
Any action and activity that can be used to prevent or eliminate a hazard or reduce it to an acceptable
level
3.9
risk
combination of the likelihood of occurrence of a hazardous event and the severity of impact if the hazard
occurs
3.10
severity of impact
level of extent or severity of the impact on human health and/or safety of supply from the potable water
installation
3.11
potable water
water suitable for human consumption
Note 1 to entry: The water may also be used for washing, cooking and sanitary purposes.
Note 2 to entry: Additionally conforming to the relevant regulations based on EU directives.

1 See EN 15975-2, 4.6.5.
2 See EN 15975-2, Table A.2.
3.12
potable water installation
pipework, fittings and appliances which are installed between the taps that are normally used for water
intended for human consumption in both public and private premises and the distribution network, but
only if they are not in the responsibility of the water supplier, in its capacity as a water supplier, under
the relevant national law
3.13
validation
obtain evidence, assessment and approval of the capability of the current or proposed control measures
3.14
verification
routine confirmation, through the provision of objective evidence, that the potable water supply system
is delivering water in accordance with the set objectives and that the risk management approach is
effective
3.15
inventory documentation
existing technical documentation of the potable water installation
3.16
piping scheme
summary technical presentation/drawing of the potable water installation
4 Symbols and abbreviations
Table 1 — Abbreviation
Abbreviation Meaning
PWC Potable water cold
PWH Potable water hot
PWH-C Potable water hot – Circulation
WSP Water Safety Plan
5 Modules and process of the WSP
5.1 Flowchart and elements of the Water Safety Plan

Figure 1 — Overview of modules of the WSP approach
5.2 Assembling WSP-Team
The first step in the Water Safety Plan approach is to assemble a Water Safety Plan Team (WSP-Team).
The WSP team should have a team leader who coordinates the team and its tasks. Any party involved in
the water system shall be invited to join the WSP team. Depending on building members can be e.g.:
— Planner, designer;
— Installer, contractor;
— Operator;
— Maintainer;
— Building administrator;
— Facility manager;
— Safety manager;
— Owner, investor;
— The person with responsibility for hygiene in the building;
— Representatives of the responsible health authorities.
The interdisciplinary team should have adequate knowledge of the building’s potable water installation,
appropriate technical and hygienic expertise and be responsible for the development and
implementation of the WSP steps.
5.3 System description
5.3.1 Technical description
An essential element of the system description is a technical description of the entire potable water
installation including the actual operating conditions since commissioning. This can be done by a
combination of preliminary talks, inspection of the inventory documentation and site inspection with an
assessment of the structural conditions and operating modes. This makes it possible to identify hazards
and hazardous events.
Figure 2 — Technical description
5.3.2 Preliminary talk
The aim of the preliminary talk is to collect current and complete building and user-specific information
about the potable water installation to be considered which cannot be obtained from the subsequent site
inspection (e.g. in-wall-installations). In particular, it should be clarified whether the as-built documents
of the potable water installation are available completely. Information on the user’s habits and/or
consumers complaints is also necessary, which can help to identify hazards and hazardous events. In
addition, it is recommended to collect the following information:
— Year of construction of the potable water installation and date of commissioning.
— Number of residential and commercial units.
— Number of users.
— Terms of use, vacancy, anomalies.
— Previous damage, e.g. pipe bursts.
— Potable water consumption in the last three years.
— Existing indications (e.g. abnormalities, defects, laboratory test reports).
— The extent of any abnormalities: Are they limited to individual housing units/building parts or
sections or is the entire potable water installation affected?
— Type and complexity of the affected building and use of the building (e.g. residential building, school,
day-care centre, hospital, retirement home, sports facility).
— Past events that have led or may lead to a hazard (e.g. floods).
— Type and extent of measures already taken (e.g. disinfection, filtration, restrictions on use) and
construction structural and/or installation related changes.
— Information on the quality of the potable water supplied by the water supplier.
— Water quality requirements at the points of consumption.
— Partial or total change of building use (e.g. change from residential to commercial).
— The accuracy of the information collected should be taken into account.
5.3.3 Inventory documentation
The inventory documentation is an essential component for determining the basis for the WSP. In
particular, it provides an overview of the potable water installation prior to the subsequent site
inspect
...