An important characteristic of the majority of the water-enhancing products on the wildfire suppression market is their ability to increase the viscosity of water. This increase in viscosity is linked to their performance. While performance of these products is key, there are several external variables that can influence how these suppressants physically behave. One such external variable is water quality, which is anecdotally known to impact water-enhancing products.
This study aimed to understand how water quality—in particular, hardness—affects the viscosity of various water-enhancing products at different mix ratios. Understanding how water quality affects the viscosity of these products can offer insight into (1) which products are highly sensitive to water quality changes, and (2) how the target viscosity of a mixed product can be affected by water quality.