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 |
Analyte
| Aldicarb | 15-100 ug/L | Oxamyl (Vydate) | 15-100 ug/L |
| Aldicarb sulfone | 15-100 ug/L | Baygon | 30-140 ug/L |
| Aldicarb sulfoxide | 15-80 ug/L | Carbaryl | 15-100 ug/L |
| Carbofuran | 15-150 ug/L | Methomyl | 15-100 ug/L |
| Methiocarb | 30-140 ug/L | 3-Hydroxy carbofuran | 15-80 ug/L |
