Answer:
Prevent runoff from infiltration the groundwater storage.
Explanation:
Water can be directed to a water treatment plant before leaving the urban area. Avoid toxins being mixed with any water system that might eventually lead to runoff. Instead, the waste can be collected and disposed of without entering the groundwater storage. On a local and national scale, there are strict laws and guidelines in most countries to reduce such toxic urban runoff. It is possible to increase water abstraction in the local area if the groundwater is already heavily impacted. By removing the water before it goes deeper it prevents long-term damage.
