Leach Field

A leach field is constructed of perforated pipes buried in trenches lined with stone or gravel. Effluent from the septic tank or aerobic system is directed to the pipes by a distribution box (see Glossary), and seeps through the perforations into the gravel and soil, eventually reaching groundwater. Evaporation also contributes to the secondary treatment process, especially during warm, sunny periods when leach fields are grassy and open to the sun.

Leach Field

Percolation through at least six inches of dry soil has been shown to remove most coliform bacteria, although chemical constituents of wastewater such as nitrates and chlorides are not removed. Research has shown that the soil may also serve to remove and/or transform the nitrogen and phosphorus in wastewaters percolating through them.

Sizing a leach field depends on the location on site, slope, size of household and flow rate of effluent, and soil percolation rate.


About Us

Founded in 1978, Save The River is a non-profit, member-supported environmental organization whose mission is to restore, preserve and protect the ecological integrity of the Upper St. Lawrence River through advocacy, education and research. Since 2004 Save The River has been a member of the Waterkeeper Alliance as the Upper St. Lawrence Riverkeeper.

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The St. Lawrence River is one of the largest Rivers in the world and a magnificent place to live, work and play. Save The River has been working for more than 35 years to protect the River for current and future generations.

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Save The River was designated the Upper St. Lawrence Riverkeeper and is a member of the international Waterkeeper Alliance. The Waterkeeper Alliance is the world’s fastest growing environmental movement, with more than 200 local Waterkeepers patrolling rivers, lakes and coastal waterways on 6 continents.


Photos from around the River

Off to the races by Pam Quimby  Resting by Pam Quimby  On the Rocks by Nick Apel  Classic Sunset by Barb Hupp  TI Park Library by Meg Kerr  Fall by Carrie Kerr  Girls by Juliane Bauer  Winter Navigation by Sherman Ward  Off on the River by Jenni Werndorf  A Seaway View by Devon Colby 
 Pictures from our Flickr photostream

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