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
Sodium | 12 – 50 mg/L |
Magnesium | 2.0 – 20 mg/L |
Calcium | 30 – 90 mg/L |
Total Hardness | 83 – 307 mg/L |
Calcium Hardness | 75 – 225 mg/L |