2018 Saw Kill Water Quality Update Lindsey Drew, Bard Water Lab Manager
1-3 Temperature 14 5 4 7 Conductivity 6 9 10 Turbidity Sewage Indicating 11 12 8 Bacteria
Temperature is an important water quality Conductivity parameter that influences the physical and chemical properties of water Dissolved pH Temperature Oxygen Aquatic & Plant Life
The 2018 average temperature of the Saw Kill is higher than 2017 Saw Kill Water Temperature 2017 Saw Kill Water Temperature 2018 30 Brook 20 Trout Brook 15 20 Trout Temperature (deg C) Temperature (deg C) 10 10 5 0 0 1 2 3 4 5 6 7 8 9 10 11 12 14 1 2 3 4 5 6 7 8 9 10 11 12 14 Sample Site Sample Site
Overall, the temperature of the Saw Kill is warming Saw Kill Water Temperature 30 Brook Trout 20 Temperature (deg C) 10 0 1976-1982 2014-2018 1976 − 1982 2014 − 2018
Although, the temperature of the Saw Kill is warming there are solutions Saw Kill Water Temperature 30 Solutions Brook Trout • Maintaining and increasing 20 buffers Temperature (deg C) -Participated in Trees for Tribs 10 • Leave woody debris • Reducing stagnant waters 0 1976-1982 2014-2018 1976 − 1982 2014 − 2018
Conductivity is our indicator for salinity, road salt is a contaminant of concern EPA Recommends Fresh Water Streams to be below 500 uS https://www.thoughtco.com/chemical-composition-of-road-salt-609168
The conductivity Saw Kill Conductivity 2018 800 of the Saw Kill increases as you move from the 600 head waters towards the Conductivity (uS) mouth 400 Head Waters Mouth 200 0 1 2 3 4 5 6 7 8 9 10 11 12 14 Sample Site
The conductivity Saw Kill Conductivity of the Saw Kill has a slight 750 decrease from 2016 to 2018 500 Conductivity (uS) 250 0 2016 2017 2018 2016 2017 2018
Turbidity is the measure of the amount of fine particles suspended in water http://chasebc.ca/chase-living/turbidity/
The turbidity of the Saw Kill Water Turbidity 2018 Saw Kill increases as you move from the head waters 10 towards the mouth Turbidity NTU 5 Mouth Head Waters 1 2 3 4 5 6 7 8 9 10 11 12 14 Sample Site
The 2018 average Saw Kill Water Turbidity turbidity is higher than both 2016 and 2017 10 Turbidity (NTU) 5 0 2016 2017 2018 2016 2017 2018
Enterococci and E. coli are important indicators of water contamination EPA Beach Action Values Enterococci E. Coli 60 CFU 190 CFU
The 2018 average enterococci concentration is lower than 2017 2017 Enterococci Concentration By Site 2018 Enterococci Concentration By Site 3 3 EPA 2 2 BAV log (CFU per 100 ml) log (CFU per 100 ml) 1 1 0 0 1 2 3 4 5 6 7 8 9 10 11 12 14 1 2 3 4 5 6 7 8 9 10 11 12 14 Sample Site Sample Site
The concentration Saw Kill Enterococci Concentration of enterococci in 3 the Saw Kill is decreasing between 2016 to 2018 EPA 2 BAV log (CFU per 100 ml) 1 0 2016 2017 2018 2016 2017 2018
Only a small percentage of E. coli are harmful Total Coliform Fecal Coliform E. Coli Pathogenic E. Coli https://www.berkeywater.com/news/e-coli-bacteria-explained/
The 2018 average E. coli concentration is lower than 2017 2018 E. coli Concentration By Site 2017 E. coli Concentration By Site EPA BAV 2 2 log (CFU per 100 ml) log (CFU per 100 ml) 1 1 0 0 1 2 3 4 5 6 7 8 9 10 11 12 14 1 2 3 4 5 6 7 8 9 10 11 12 14 Sample Site Sample Site
The concentration Saw Kill E. coli Concentration of E. coli in the 3 Saw Kill is EPA decreasing BAV between 2016 2 to 2018 log (CFU per 100 ml) 1 0 2016 2017 2018 2016 2017 2018
Next Sampling Friday December 14 th Email: ldrew@bard.edu if you’re interested
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