Sewer Laterals
What is a Sewer Lateral?
A sewer lateral is the privately owned pipe that connects your home or building to the public sewer main in the street.
As the property owner, you're responsible for maintaining and repairing this section of pipe to keep things flowing properly.
Learn more in the District’s Ordinance No. 54 and Standard Specifications.
Why Lateral Maintenance Matters
Taking care of your lateral isn’t just about avoiding clogs — it’s about protecting your home, your neighbors, and the environment.
Cracks or breaks in private laterals can:
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Cause sewer backups into homes or yards
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Lead to overflows onto streets or into the Bay
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Allow stormwater to enter the sewer system during heavy rains, which overwhelms pipes and treatment plants
These problems can result in serious damage to property, public health concerns, and pollution of local waterways.
Did You Know?
There are as many miles of private laterals as there are public sewer lines in most Marin communities. That means private maintenance is just as important as public system upgrades when it comes to preventing sewer spills.
The Big Picture: Clean Water & Healthy Communities
Maintaining your lateral helps:
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Prevent leaks, spills, and property damage
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Reduce treatment costs over time
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Keep streets, homes, and the Bay cleaner
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Protect local ecosystems
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Improve property values
Together, we can create a more resilient, efficient sewer system — and a healthier community for everyone.