EN 15513:2014

• Abstract:

  This European Standard is applicable to carbon dioxide used for treatment of swimming pool water. It describes the characteristics of carbon dioxide and specifies the requirements and the corresponding test methods for carbon dioxide. It gives information on its use in swimming pool water treatment.

• Status: Published
• Publication Date: 18-Mar-2014
• Withdrawal Date: 29-Sep-2014
• ICS: 71.100.80 - Chemicals for purification of water
• Technical Committee: CEN/TC 164 - Water supply
• Drafting Committee: CEN/TC 164/WG 9 - Drinking water treatment
• Current Stage: 9060 - Closure of 2 Year Review Enquiry - Review Enquiry
• Start Date: 04-Mar-2026
• Completion Date: 04-Mar-2026
• Ref Project: SIST EN 15513:2014 - Chemicals used for treatment of swimming pool water - Carbon dioxide

• Replaces: EN 15513:2007 - Chemicals used for treatment of swimming pool water - Carbon dioxide
• Effective Date: 26-Mar-2014
• Refers: EN 936:2013 - Chemicals used for treatment of water intended for human consumption - Carbon dioxide
• Effective Date: 28-Jan-2026

Overview

EN 15513:2014 is the European Standard that applies to carbon dioxide (CO2) used for the treatment of swimming pool water. It defines identification, commercial form, physical and chemical properties, minimum purity criteria, required test methods and guidance on labelling, transportation and storage. The standard supports safe and effective pH control in pool water while aligning product characteristics with regulatory and safety requirements.

Key Topics

• Identification and properties: CO2 is described by chemical name, formula (CO2), CAS 124-38-9 and basic physical properties (colourless gas/liquid, solubility and critical temperature/pressure).

• Purity and composition: The commercial product shall comply with a minimum content of CO2 ≥ 99.9 % (V/V). The standard lists expected impurities and limits for the liquid phase such as:

  • Moisture ≤ 50 ppm v/v (≤ 20 ppm w/w max.)
  • Ammonia ≤ 2.5 ppm v/v
  • Oxygen ≤ 30 ppm v/v
  • Nitrogen oxides (NO / NO2) ≤ 2.5 ppm v/v each
  • Non-volatile residue (particulates) ≤ 10 ppm w/w
  • Non-volatile organics (oil & fat) ≤ 5 ppm w/w
  • Total volatile hydrocarbons (as methane) ≤ 50 ppm v/v (≤ 20 ppm non‑methane)
  • Specific low-level organics (acetaldehyde, benzene) and other species with stated limits

• Test methods: Sampling and analytical methods referenced are those given in EN 936.

• Labelling & transport: At publication CO2 is generally not subject to EU labelling under CLP, but transport classification is provided (e.g., UN 1013 for liquid CO2, refrigerated UN 2187) and applicable RID/ADR/IMDG rules are noted.

• Storage & handling: Delivered as liquefied gas in cylinders or tankers; containers must be dedicated or properly cleaned. Store in well-ventilated areas, protect cylinders from heat, secure upright cylinders to prevent toppling.

Applications

• pH control in pools: CO2 is used in gaseous form injected into circulation systems to adjust pH and carbonate alkalinity. It is an option where control of acidity without adding salts is preferred.
• Dose guidance: The standard provides practical examples (e.g., to raise bicarbonate as CaCO3 by 10 mg/L requires ~4.4 mg CO2/L), illustrating dosing relationships without prescribing fixed doses.
• Operational benefits: Using CO2 enables controlled, buffered pH adjustments and can reduce reliance on strong acids; compliance with purity and impurity limits helps avoid adverse effects on water quality and swimmer comfort.

Related Standards

• EN 936 - Chemicals used for treatment of water intended for human consumption - Carbon dioxide (referenced normative methods).

Note: Compliance with EN 15513:2014 defines product characteristics and test methods but does not replace national regulations or approvals for pool chemicals. Users must verify national rules and follow supplier safety data and emergency procedures.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kemikalije, ki se uporabljajo za pripravo bazenske vode - Ogljikov dioksidProdukte zur Aufbereitung von Schwimm- und Badebeckenwasser - KohlenstoffdioxidProduits chimiques utilisés pour le traitement de l'eau des piscines - Dioxyde de carboneChemicals used for treatment of swimming pool water - Carbon dioxide71.100.80Chemicals for purification of water13.060.20Pitna vodaDrinking waterICS:Ta slovenski standard je istoveten z:EN 15513:2014SIST EN 15513:2014en,fr,de01-junij-2014SIST EN 15513:2014SLOVENSKI
STANDARDSIST EN 15513:20081DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 15513
March 2014 ICS 71.100.80 Supersedes EN 15513:2007English Version
Chemicals used for treatment of swimming pool water - Carbon dioxide
Produits chimiques utilisés pour le traitement de l'eau des piscines - Dioxyde de carbone
Produkte zur Aufbereitung von Schwimm- und Badebeckenwasser - Kohlenstoffdioxid This European Standard was approved by CEN on 5 January 2014.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, 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:
Avenue Marnix 17,
B-1000 Brussels © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15513:2014 ESIST EN 15513:2014

Page
Foreword .3 Introduction .4 1 Scope .5 2 Normative references .5 3 Description .5 3.1 Identification .5 3.2 Commercial form .6 3.3 Physical properties .6 3.4 Chemical properties .7 4 Purity criteria .7 4.1 General .7 4.2 Composition of commercial product .7 4.3 Impurities and main by-products .7 4.4 Chemical parameters .8 5 Test methods .8 6 Labelling – Transportation – Storage .8 6.1 Means of delivery .8 6.2 Labelling according to the EU legislation ) .9 6.3 Transportation regulations and labelling .9 6.4 Marking .9 6.5 Storage .9 Annex A (informative)
General information on carbon dioxide . 10 A.1 Origin . 10 A.2 Use . 10 A.3 General rules relating to safety . 11 Bibliography . 12
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