Drafting…
Fig 1. Electrical Conductivity values at Site 1 (upper Governors Brook) on individual sampling days. Each bar shows the EC value for a particular date
– CB Observations Gov. Bk/Colpitt Lake
“Charles Bull has been conducting “Citizen Science” observations on Electrical Conductivity (a measure of salt content) & Temperature of surface waters at 3 locations in the upper Williams Lake Watershed April 2022 to April 2023 & ongoing.”
The webpage describes results from the first complete year of sampling. An extract:
“Full strength seawater is about 50,000 uS/cm. So water in Governors Brook on the high EC days (Fig 1) was the equivalent of about 20-40% seawater. The Canadian Water Quality Guidelines for the Protection of Aquatic Life for chloride are 120 mg CL/L for Long term Exposure and 640 mg CL/L for short term exposure; the equivalent EC values are 474 and 2414 uS/cm respectively (source). On the days when EC exceeded 9,999 uS/cm, the chloride values were likely at least 5 x the critical value for short term exposure!”