Türkçe 简体中文
Türkçe 简体中文
  1. Stichting ZDHC Foundation Help Centre
  2. Engagement
  3. ZDHC Approved Solution Providers
  4. ZDHC Approved Wastewater Laboratories
Knowledge base

Please refer to ZDHC Wastewater Guidelines Version 2.1 and to Sampling and ZDHC Wastewater and Sludge Laboratory Sampling and Analysis Plan Version 2.1.

In order to apply for acceptance as a ZDHC Wastewater Testing Laboratory, the applicant laboratory must request acceptance for all of the parameters listed on the ZDHC Wastewater Guideline. Additionally, the following is required:

  1. ISO 17025 certification for all MRSL parameters, even in a different kind of matrix
  2. ISO 17025 certification for at least 50% of the conventional parameters. Successful completion of correlation testing for those parameters not ISO 17025 certified
  3. ZDHC Approved Test methods shall be used or an equivalent method*, with the exception of Colour and COD
  4. Follow/Apply the ZDHC Wastewater and Sludge Laboratory Sampling and Analysis Plan
  5. Not more than 60% of parameters for wastewater as listed in the platform could be subcontracted

The outsourced laboratory may be an affiliate of, or external to, the laboratory accredited for testing.

*An equivalent method is defined by ZDHC as a method the has the fundamentally same sample collection (for example: container, preservative), sample preparation (for example: derivatization, extraction, digestion) and analysis (for example; GC, GC/MS, LC, LC/MS). The laboratory has to share with ZDHC relevant information to assess the equivalence. Alternatively, a method may be accepted by ZDHC if a method validation process has been successfully completed, and those results/data are shared with ZDHC. The pre-approval process is conducted so that data from one lab can be compared directly and equivalently to any other lab in the ZDHC program

Still need Help?

Let us help you find what you're looking for or connect you to our support team.

Submit a request
Related articles
  • ZDHC Approved Wastewater Laboratory - Application Procedure and Fee
  • ZDHC Approved Wastewater Laboratory - Sampler Training E-Learning
  • ZDHC Approved Wastewater Laboratory - frequently asked questions (platform access, application and payment)
Popular articles
  • Sign up for our newsletter.


  • Contact

  • ADDRESS

    Stichting ZDHC Foundation
    Oudezijds Voorburgwal 316-B
    1012 GM Amsterdam
    The Netherlands

  • EMAIL
    support@zdhc.org
  • Legal

  • Disclaimers
  • Resources

  • Submit a request
  • Glossary
  • Engagement
  • Platforms

  • Roadmap to Zero
  • Implementation HUB
  • ZDHC Gateway
  • ZDHC Academy

Privacy Notice
© Stichting ZDHC Foundation. 2023. All rights reserved

Search for articles...