Environmental Reference MaterialsInorganics - NPW PTProficiency Testing

EPA Inorganics NPW Set – PEI-037K

$646.00

Set includes:  Demand, Total Phenolics, Minerals, Total Residual Chlorine, Hardness, pH, Trace Metals, Simple Nutrients, Mercury, Complex Nutrients, Oil & Grease, Residue, Total Cyanide and Hexavalent Chromium. read more

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Catalog Number:
PEI-037K
Study Number

WP-272, WP-273, WP-274, WP-275, WP-276, WP-277, WP-278, WP-279

2020/2021 NPW Study Schedule

2020/2021 NPW Study Schedule

Study Number Study Opens Study Closes
WP-270 Nov. 4 Dec. 18, 2020
WP-271 Jan. 13 Feb. 26
WP-272 Feb. 23 April 8
WP-273 April 12 May 26
WP-274 May 4 June 17
WP-275 July 14 Aug. 27
WP-276 Aug. 3 Sept. 16
WP-277 Sept. 1 Oct. 15
WP-278 Oct. 11 Nov. 24
WP-279 Nov. 2 Dec. 16