88 W. McIntyre Street, Suite 200, Key Biscayne, FL 33149

Biscayne Bay Water Watch

Biscayne Bay Water Watch (BBWW) is a community-based volunteer water quality monitoring program developed and managed by the UF/IFAS Sea Grant Extension Program in Miami-Dade County. The goal of BBWW is to garner attention to the health of Biscayne Bay and promote awareness about the importance of water quality on our local environment and economy.

UF/IFAS Sea Grant Extension is partnering with local organizations to adopt water monitoring sites throughout Biscayne Bay and surrounding waters. Their volunteers are trained to collect chemical and physical parameters once a month at their adopted site(s). Field-based data includes temperature, pH, salinity, and dissolved oxygen. Water samples are collected for analysis of total nitrogen, total phosphorus, ammonia, silica, and chlorophyll a.

The Key Biscayne Community Foundation (through the Citizen Science Project) received a two-year Environmental Education grant from the EPA for water quality and shoreline conservation on Key Biscayne. We are using this grant not only to create educational opportunities for the residents and visitors of the Key, but also to set up more water testing sites. In 2017, we’re sponsoring the first year of a new site near Bear Cut, where one of our partners, Miami Rowing Club, will begin monthly water testing starting in March.

We also hope to set up three Atlantic sites for less intense testing which will include temperature, pH, salinity, and dissolved oxygen.

Fact Sheets

Here are some fact sheets from the Biscayne Bay Water Watch to better understand the following data being collected and reported. Learn more about the Biscayne Bay Water Watch.

Station BB32 Water Data

Avg. Temperature (˚C)

  • 2015
  • 2016
  • 2017

Avg. Salinity (ppt)

  • 2015
  • 2016
  • 2017

Chlorophyll a (ug/L)

  • 2015
  • 2016
  • 2017

Median pH

  • 2015
  • 2016
  • 2017

Avg. Dissolved Oxygen (mg/L)

  • 2015
  • 2016
  • 2017

Station BB32 Data Table

Month Year Average Temperature (˚C) Median pH Average Salinity (ppt) Average Dissolved Oxygen (mg/L) Chlorophyll a (ug/L)
SEP 2015 31.4 8.16 35.5 3.2 1.099
OCT 2015 8.14 30.0 5.0 0.984
NOV 2015 28.1 8.00 33.0 5.0 0.421
DEC 2015 25.3 8.07 35.0 5.3 0.253
JAN 2016 22.4 8.18 40.0 6.2 1.094
FEB 2016 18.8 35.0 6.6 0.631
MAR 2016 24.5 8.18 40.0 6.0 0.337
APR 2016 25.0 8.35 33.5 5.6 0.953
MAY 2016 26.7 8.29 35.0 5.5 0.666
JUN 2016
JUL 2016
AUG 2016 30.4 8.22 35.0 4.9 0.649
SEP 2016 28.5 8.05 30.0 4.6 0.361
OCT 2016
NOV 2016
DEC 2016 25.9 8.07 5.5 0.702

Station BB32 Nutrient Data

Silica SI (uM)

  • 2015
  • 2016
  • 2017

Nitrate NO3 (uM)

  • 2015
  • 2016
  • 2017

Ammonium NH4 (uM)

  • 2015
  • 2016
  • 2017

Nitrite NO2(uM)

  • 2015
  • 2016
  • 2017

Nitrite + Nitrate (uM)

  • 2015
  • 2016
  • 2017

Phosphate PO4 (uM)

  • 2015
  • 2016
  • 2017

Station BB32 Nutrient Table

Month Year Silica Si (uM) Nitrite NO2(uM) Nitrate NO3 (uM) Nitrite + Nitrate (uM) Ammonium NH4 (uM) Phosphate PO4 (uM)
SEP 2015 6.290 0.235 0.751 0.986 2.521* 0.000
OCT 2015 1.130 0.278 0.918 1.196 1.622* 0.000
NOV 2015 5.834 0.270 1.195 1.465 2.817* 0.075
DEC 2015 7.648 0.257 2.900 3.157 3.279 0.107
JAN 2016 4.956 0.171 1.928 2.099 1.422 0.085
FEB 2016 1.161 0.060 0.418 0.478 1.686 0.046
MAR 2016 0.170 0.042 0.088 0.130 1.429 0.019
APR 2016 1.479 0.082 0.300 0.382 2.891 0.029
MAY 2016 4.135 0.116 0.495 0.611 2.637 0.044
JUN 2016
JUL 2016
AUG 2016 2.338 0.047 0.275 0.322 0.322 0.075
SEP 2016 8.436 0.241 1.197 1.438 1.438 0.000
OCT 2016
NOV 2016
DEC 2016 7.953 0.530 0.000 0.443 3.482 0.050