Yes, surface water can be collected in a rainwater harvesting tank, but there are considerations to keep in mind. It is important to determine if the rainwater collected from the roof alone is sufficient for your needs. If it is, there is no need to collect surface water. However, if additional volume is required, surface water can be considered.
When collecting surface water, it is crucial to treat and filter it, as it may contain mixed fuels, oils, or other contaminants. This is especially important if the surface water comes from areas like car parks or driveways. Collecting water from pavement areas or back gardens might be safer as they are less likely to contain vehicle-related pollutants.
Before channeling surface water into your rainwater harvesting tank, carefully assess its source and potential contaminants. Consider the purpose of the water and the amount of rainwater you truly need to harvest. Generally, it is encouraged to rely on roof areas only unless additional volume is necessary.
