What is the minimum horizontal distance between a sanitary sewage treatment and disposal system and a public water supply source?

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Multiple Choice

What is the minimum horizontal distance between a sanitary sewage treatment and disposal system and a public water supply source?

Protecting a public water supply from septic system effluent relies on providing enough separation so contaminants have to travel farther and face more natural attenuation before they could reach the water source. The official minimum distance is 100 feet, which helps reduce the chance that leachate or bacteria from the septic system can contaminate groundwater used by a public well or intake. If the soil is very permeable or the groundwater is shallow, regulators may require more distance or additional protective measures, but 100 feet is the standard baseline. Shorter distances increase contamination risk, while greater distances lessen that risk, though not all sites need more than the minimum unless conditions demand it.

Protecting a public water supply from septic system effluent relies on providing enough separation so contaminants have to travel farther and face more natural attenuation before they could reach the water source. The official minimum distance is 100 feet, which helps reduce the chance that leachate or bacteria from the septic system can contaminate groundwater used by a public well or intake. If the soil is very permeable or the groundwater is shallow, regulators may require more distance or additional protective measures, but 100 feet is the standard baseline. Shorter distances increase contamination risk, while greater distances lessen that risk, though not all sites need more than the minimum unless conditions demand it.

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