What is the minimum horizontal distance of separation required between a sewer and a water main?

The minimum horizontal distance of separation required between a sewer and a water main is established to prevent contamination of the potable water supply. A separation of 10 feet is recommended to create a safe buffer zone. This distance helps to ensure that any potential leaks or breaks in the sewer system do not pose a risk to the integrity of the water supply. By maintaining this minimum distance, the likelihood of sewage infiltrating the water distribution system is significantly reduced, thereby safeguarding public health.

Design and engineering standards emphasize this separation to mitigate risks associated with cross-contamination, emphasizing that maintaining adequate spacing between these utilities is critical for safe and reliable water distribution practices.