Outer Island Pier Water Quality (2018)
Water quality parameters were monitored by the CSU interns during the summer 2018 from May 31st to August 26th. Water quality monitoring occurred each day at 2:00 pm from the end of the floating dock. Water quality parameters monitored included: water temperature, salinity, conductivity, specific conductance, dissolved oxygen, Secchi disk depth, turbidity, and pH. All measurements were made on water samples collected from at a depth of one meter.
Water temperature gradually increased from the spring to the end of the summer. Water temperature ranged from 14.5°C (6/10) to a high of 26.5°C (8/3). Variations in water temperature over the summer correlated well with changes in measured air temperature. Dissolved oxygen concentrations were highest initially (9.63 mg/L) on 6/8 and showed a decrease over the summer months correlating with increasing temperatures reaching a low of 6.08 mg/L on 8/14. With one exception, salinity showed little variability, with a range of only 27.1 ppt (6/1) to 28.8 ppt (8/10), while conductivity showed a slightly larger range from 34.22 mS (5/31) to 45.50 mS (8/10). Both parameters showed less variability than in previous years. Both salinity and conductivity decreased dramatically on 8/10, corresponding to heavy precipitation on that date.
Water clarity, as measured by a Secchi disk, varied from 0.4 m (6/22) to 1.4 m (7/28) during the monitoring period. pH ranged from a low of 7.55 (7/4) to a high of 8.46 (8/26). Similar to other parameters this season, water clarity/turbidity and pH showed less variation than previous years.
View/Download Data (Adobe PDF | Microsoft Excel)
2013| 2014| 2015| 2016| 2017| 2018| 2019| 2020 | 2021 | 2022