Sometimes there are sources of water which are slightly contaminated with salt, such as coastal wells or pools of rainwater in rocks near the coast, or water containers with pinhole leaks which have been stored in proximity to seawater (e.g. aging Dromedary bags in a kayak). In these cases, is the subjective taste adequate to warn me when water has become too salty to drink safely? Is there another means?
I find the following answer regarding the danger of drinking seawater to be compelling: here I would like to know at what point these issues become decisive and the water should be avoided.