Contaminants

any unacceptable or unintended trace materials.
Found on http://www.pharmapackagingsolutions.com/expert-insights/glossary/

Contaminants

Swimming pool chemistry: Any microparticle or organism which reduces water clarity or quality or presents health hazards. All of our filtering, circulating and sanitizing is directed here.
Found on http://www.1st-direct.com/acatalog/Chemical_Glossary.html
No exact match found