Advanced Drinking Water Residue and Transformation Product Testing: CEMAS Support for EFSA and UK Compliance
CEMAS, a provider of regulated analytical services for the crop protection and biocides sectors, is investing heavily in the development of an expanded water treatment residue testing service. This follows the publication of EU guidance on evaluating how water treatment affects active substances and metabolites in water used for drinking (EFSA Journal 2023;21(8):8194). The guidance applies to new product and substance applications starting in April 2026.
As regulations evolve, companies will need to understand whether residues or transformation products formed during water treatment, such as chlorination, pre‑oxidation, and chloramination, pose human health risks. To meet this need, CEMAS is developing full analytical support across multiple processes:
- Chlorination and chloramination
- Pre‑oxidation
- Combination processes, including oxidation followed by chlorination or chloramination
Further analytical modules will help identify transformation products and guide risk assessment planning.
“This significant investment ensures we can deliver the data and expertise companies need to meet 2026 requirements,” said Garry Langridge, Director and Section Manager, Agrochemicals and Biocides: Residues at CEMAS. “We are committed to generating robust, regulatory-ready data that supports human health evaluation.”
When launched, this service will give clients confidence to meet tightening global expectations for water quality and chemical safety.