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

The minimum horizontal distance required between a water main and a sanitary sewer is essential for preventing contamination of the potable water supply. A distance of 10 feet is the accepted standard that helps ensure that any potential leaks or breaks in the sanitary sewer do not impact the water main. This distance serves as a safety buffer, allowing for enough separation to reduce the risk of cross-contamination from wastewater entering the drinking water supply.

Having this minimum distance is critical in maintaining public health and safety. The regulations are put in place to mitigate risks associated with environmental factors, such as soil saturation or groundwater movement, which could otherwise lead to contamination. The decision to establish a 10-foot minimum is based on years of research and industry best practices aimed at safeguarding drinking water.

While lesser distances may seem sufficient, they could increase the risk factors involved in accidental contamination, especially in areas prone to flooding or soil erosion. Thus, the standard of 10 feet is recognized and enforced to ensure the integrity of water distribution systems and protect water quality.