Recent precipitation
Qualitative information is essential to provide context for observations, as key impacts on water quality may not be reflected in data alone. Recent precipitation events, especially heavy rain, can significantly influence water conditions. Rainfall from the past hours or days can cause increased runoff, transporting pollutants such as oils, fertilizers, or road salts into nearby waterways. It can also raise water levels, increase turbidity, and alter flow patterns. Noting the timing and intensity of precipitation in the last 24hrs, along with any visible changes, and taking photos when possible, can greatly enhance the value of your water quality assessments.