Environmental Reference Materials, Inorganics - NPW PT, Non-Potable Water (NPW) PTs, Proficiency Testing
NPW – Simple Nutrients #PEI-138
Non-Potable Water NPW PT Study Schedule
2024 NPW PT Study Schedule | ||
Study Number | Study Opens | Study Closes |
WP-297* | Jan. 16, 2024 | Feb. 29, 2024 |
WP-298 | March 11, 2024 | April 24, 2024 |
WP-299* | April 16, 2024 | May 30, 2024 |
WP-300 | May 7, 2024 | June 20, 2024 |
WP-301* | July 16, 2024 | Aug. 29, 2024 |
WP-302 | Aug. 6, 2024 | Sept. 19, 2024 |
WP-303* | Oct. 8, 2024 | Nov. 21, 2024 |
WP-304 | Nov. 5, 2024 | Dec. 19, 2024 |
Analyte
Nitrate-nitrite as N | 2.5 – 25 mg/L |
Nitrate as N | 2.0 – 25 mg/L |
Ammonia as N | 1.0 – 20 mg/L |
Orthophosphate as P | 0.5 – 5.5 mg/L |