Prompton Reservoir Water Quality 2020.pdf

Summary:

- Purpose: Monitor water quality parameters in Prompton Reservoir.
- Reservoir Description: A 240-acre impoundment on the Lackawanna River, with a maximum depth of 45 feet.
- Monitoring Elements: Physical stratification, water column chemistry, trophic state, and reservoir bacteria.
- Methods: Regular sampling at three stations (PR-1, PR-2, PR-3) from April to October. Parameters measured include temperature, dissolved oxygen, pH, nutrients (ammonia, nitrite/nitrate, total Kjeldahl nitrogen, total phosphorus, dissolved phosphorus), solids (total dissolved solids, total suspended solids), biochemical oxygen demand, alkalinity, total organic carbon, chlorophyll a, and bacteria counts.
- Results and Discussion:
- Stratification Monitoring: The reservoir exhibited thermal stratification from June to September, with surface temperatures reaching 82°F and bottom temperatures around 50°F. Dissolved oxygen levels were consistently above 5 mg/L, and pH ranged from 6.5 to 8.5.
- Water Column Chemistry Monitoring: Nutrient levels were generally low, with ammonia ranging from 0.01 to 0.15 mg/L, nitrite/nitrate from 0.05 to 0.5 mg/L, and total phosphorus from 0.01 to 0.05 mg/L. Total dissolved solids and total suspended solids were consistently below 100 mg/L. Biochemical oxygen demand was low, ranging from 1 to 5 mg/L.
- Trophic State Determination: Based on Carlson's trophic state index, Prompton Reservoir was classified as mesotrophic in 2020.
- Reservoir Bacteria Monitoring: Total coliform and E. coli counts were consistently below detection limits or within acceptable limits, indicating good water quality.
- References and Appendices: Include data tables, laboratory reporting sheets, and additional information on water quality standards and criteria.