Staying hydrated is crucial for both enjoyable day walks and multi-day hikes. Getting hold of additional water on a walk in Scotland is often not a problem, but knowing whether it is safe to drink can be. The presence of animals (who will be defecating and sometimes dying near or in water sources) and humans who may be contributing chemicals as well as their own waste to the environment can result in nasty illness as a result of drinking contaminated water. People can also be worried about industrial, agricultural and sewage effulent as well as micro-plastics in water. Unless you…