Environmental Reference MaterialsInorganics - NPW PTNon-Potable Water (NPW) PTsProficiency Testing

Full NELAC Inorganics Set – PEI-035K

Set includes:  Demand, Minerals, Residue, Hardness, Simple Nutrients, Nitrite, Silica, Complex Nutrients, Oil & Grease, Bromide, Total Cyanide, MBAs, Total Phenolics, Boron, Total Residual Chlorine, Settleable Solids, Trace Metals, Volatile Solids, Mercury, Sulfide, pH, Hexavalent Chromium, and Turbidity. read more

This product is currently out of stock and unavailable.

Catalog Number:
PEI-035K
Study Number

WP-261, WP-262, WP-263, WP-264, WP-265, WP-266, WP-267, WP-268, WP-269, WP-270, All

2019/2020 NPW Study Schedule

2019/2020 NPW Study Schedule

Study Number Study Opens Study Closes
WP-261 Nov. 6 Dec. 20, 2019
WP-262 Jan. 14 Feb. 27, 2020
WP-263 Feb. 25 April 9, 2020
WP-264 April 8 May 22, 2020
WP-265 May 6 June 19, 2020
WP-266 July 15 Aug. 28, 2020
WP-267 Aug. 12 Sept. 25, 2020
WP-268 Sept. 2 Oct. 16, 2020
WP-269 Oct. 7 Nov. 20, 2020
WP-270 Nov. 4 Dec. 18, 2020