Drinking Water (WS) PTs,  Environmental Reference Materials,  Inorganics - WS PT,  Proficiency Testing

Full NELAC WS Inorganics Kit – PEI-018K

Set includes: Inorganic Disinfection By-Products, Hardness, Inorganics, TOC/DOC, pH, Cyanide, Trace Metals, Residual Free Chlorine, Mercury, Corrosivity, Turbidity, Nitrite, Silica, Hexavalent Chromium, MBAs, UV254 Absorbance, Perchlorate and Orthophosphate. read more

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Catalog Number:
PEI-018K
Choose Study

WS-137, WS-138, WS-139, WS-140

Drinking Water Chemistry WS Proficiency Study Schedule

2024 WS Drinking Water Chemistry PT Study Schedule
Study Number Study Opens Study Closes
WS-137 Jan. 8, 2024 Feb. 21, 2024
WS-138 April 3, 2024 May 17, 2024
WS-139 July 2, 2024 Aug. 15, 2024
WS-140 Oct. 15, 2024 Nov. 28, 2024

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