Title: CPDW project – Assessment of effect of high level of disinfectants on products in contact with drinking water 
Resource Type: document --> technical publication --> report 
Country: EU Projects 
Year: 2003 
Availability: Rigal, S. et al. (2003) CPDW project – Assessment of effect of high level of disinfectants on products in contact with drinking water, EU Report 20838 
Author 1/Producer: Rigal, S. 
Other Authors/Producers: Ashworth, J., Benoliel, M., van der Jagt, H., Klinger, J., Ottaviani, M., Wagner, I., Hoekstra, E.J. 
Author / Producer Type: EC Project 
Report / download web link (=direct link): http://www.jrc.cec.eu.int  
EUGRIS Keyword(s): Water and sanitation-->Water and sanitation Overview
Water resources and their management -->Water resources and their management Overview
 
Long description: This report is related to the WP4 «Disinfection by-products» as a part of the European Project “Development of harmonised tests to be used in the European Approval Scheme (EAS) concerning Construction Products in Contact with Drinking Water (CPDW), under contract n° EVK1-CT2000-00052. The objectives of this research were first to complete a review of the use of high levels of disinfectants applied to water distribution systems in Europe, then to obtain experimental data concerning the migration rate under different disinfection conditions for a range of the representative CPDW commonly used in Europe and finally to give guidance to the regulators about the need to include a simulation of high levels of disinfection in the European Acceptance Scheme (EAS). In the majority of Member States (MS), high levels of chlorine are applied to CPDW in the water distribution systems, in order to prevent or to remove microbial contamination. Hydrogen peroxide is also used in response to environmental issues. Potassium permanganate is used inside buildings in some MS. Regulations or practical guidelines for disinfection procedures are available in most of the MS, mainly in public networks. Few MS have regulations for application inside building and in case of Legionella contamination. Nevertheless, the implementation of the European Directive DWD 98/83/EC including microbial requirements at the consumer tap, will lead the MS to develop guidance for disinfection inside buildings. The experimental part of the WP4 included a testing programme: a range of organic products were preliminarily exposed to different disinfection procedures (chlorine and hydrogen peroxide under several contact times and concentrations) and the migration rate was compared with the same materials not exposed to disinfectants. The products to be studied were chosen taking into account their main uses in European water distribution systems application (PVC-U, HDPE, EPDM, epoxy and polyester resins, cement with organic additive). The choice of significant parameters was based on the experience of the participants and on existing national requirements (odour, flavour, TOC, haloforms and other organic micro-pollutants). Supporting standards or draft standards produced by CEN/TC164/WG3 “Materials in Contact with Drinking Water” were used for this work in order to produce migration water. Six European Institutes have participated in WP4. All were involved in water analysis and four of them were national laboratories for testing materials in contact with drinking water. The test results showed clearly that there was no significant difference attributable to the different disinfectant solutions and contact times, and no difference when the products were not in contact with disinfectants. The research permitted a good transfer of experience between these laboratories, and also permitted to make proposals for the next EAS assessment. These proposals to RG-CPDW are: • not to include high levels of disinfection in the general test procedure applied to CPDW for EAS logo, except for new products, • to include in EAS a list of significant chemical parameters (odour, flavour, TOC, GCMS technique analysis). • to include inter-laboratories exercises in the future in order to increase the interlaboratory comparability of the results. Some parameters showed a low reproducibility between laboratories. 
Link to Project(s): CPDW Development of harmonised tests to be used in the European Approval Scheme concerning Construction Products in contact with Drinking Water
 
Link to Organisation(s): JRC Joint Research Centre ISPRA
 
Submitted By: Dr Stefan Gödeke WhoDoesWhat?      Last update: 10/10/2006