Water: Monitoring & Assessment
Table 5.2
| Method | Location (Lab or Field) |
Comments | Table 5.2 Summary of chemical monitoring methods Volunteers can measure some parameters in the field or in the laboratory. |
| Dissolved Oxygen (DO) | |||
| Winkler with eye dropper | Either | If lab, the sample is fixed in field and titrated in lab; must be measured within 8 hours of collection. | |
| Winkler with digital titrator or buret | Either | ||
| Meter | Field | The meter is fragile and must be handled carefully. | |
| Biochemical Oxygen Demand (BOD) | |||
| Winkler with eye dropper | 1st part - Either 2nd part - Lab |
If lab, the sample is fixed in field and titrated in lab; must be measured within 6 hours of collection. | |
| Winkler with digital titrator or buret | 1st part - Either 2nd part - Lab |
If lab, the sample is fixed in field and titrated in lab; must be measured within 6 hours of collection. | |
| Meter | 1st part - Either 2nd part - Lab |
The meter is fragile and must be handled carefully; must be measured within 6 hours of collection. | |
| Temperature | |||
| Thermometer | Field | Cannot be done in the lab. | |
| pH | |||
| Color comparator | Either | If lab, measured ASAP within 2 hours of collection. | |
| pH "Pocket Pal" | Either | If lab, measured ASAP within 2 hours of collection. | |
| Meter | Either | If lab, measured ASAP within 2 hours of collection. | |
| Turbidity | |||
| Meter | Either | If lab, measured ASAP within 24 hours of collection. | |
| Total Orthophosphate | |||
| Ascorbic Acid w/ color comparator | Either | If lab, measured within 48 hours of collection. | |
| Ascorbic acid w/ spectophotometer | Either | If lab, measured within 48 hours of collection. | |
| Nitrate | |||
| Cadmium reduction w/ color comparator | Either | If lab, measured within 48 hours of collection. | |
| Cadmium reduction w/ spectrophotometer | Either | If lab, measured within 48 hours of collection. | |
| Total Solids | |||
| Oven drying/weighing | Lab | Must be measured within 7 days of collection. | |
| Conductivity | |||
| Meter | Either | If lab, measured ASAP within 28 days of collection. | |
| Total Alkalinity | |||
| Titration | Either | If lab, measured within 24 hours of collection. | |
| Fecal Bacteria | |||
| Membrane filtration | Lab | Must be measured within 6 hours of collection. | |