Outer Island Pier Water Quality (2024)

          Water quality parameters were monitored by the CSU interns during the summer of 2024
from May 22nd to September 26th. Water quality monitoring occurred each day at 10:00 am 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 at a depth of one meter.

         Salinity measurements showed little variability, with a range of only 25.0 ppt (5/22) to
28.2 ppt (8/7), while conductivity showed a slightly larger range from 30.92 mS (5/24) to
42.31 mS (8/3) (Figure la). Both parameters showed similar variability compared to previous
years. The water temperature gradually increased from spring to the end of the summer. The
water temperature ranged from 14.0°C (5/24) to a high of 25.2°C (8/11). Variations in water
temperature over the summer correlated well with changes in measured air temperature (Figure
2). Dissolved oxygen concentrations were highest initially (10.69 mg/L) on 6/9 and showed a
decrease over the summer months correlating with increasing temperatures reaching a low of
5.69 mg/L on 7/23 (Figure lb).

         Water clarity, as measured by a Secchi disk, varied from 0.48 m (6/14) to 1.9 m (9/11)
during the monitoring period (Figure 3a). pH ranged from a low of 7.52 (8/7) to a high of 8.06
(6/7) (Figure 3b). Like other parameters this season, water clarity/turbidity and pH showed
similar variations with previous years.

View/Download Data (Adobe PDF | Microsoft Excel)

2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024