title: Laboratory performance evaluation studies and their relationship to the Global Environmental Monitoring System in Water (GEMS/Water).
mesh_terms: D004784:Environmental Monitoring / Q000379:methods*; D007753:Laboratories / Q000592:standards*; D013223:Statistics as Topic; D014481:United States; D014484:United States Environmental Protection Agency; D014874:Water Pollutants, Chemical / Q000032:analysis; D014881:Water Supply / Q000032:analysis* / Q000592:standards; D014944:World Health Organization
chemical_list: D014874:Water Pollutants, Chemical