Sewage Treatment Systems

In this section, two types of wastewater treatment tanks will be discussed: anaerobic (septic tank) and aerobic. Both types of tanks treat toilet waste (blackwater) and wastewater from sinks and baths (greywater) in conjunction with a secondary treatment such as a leach field.

Both processes use “bugs” or bacteria to break down pollutants. In the aerobic process, the bacteria require oxygen to break pollutants down into carbon dioxide and water. Anaerobic processes work without oxygen and produce methane and other gases.


A third type of system, the holding tank, which should only be considered as a last alternative, is discussed at the end of this section.

Holding Tanks

Aerobic, Conventional & STS, Composting toilet
For: new and replacement installations where conventional-sized leach fields are not possible and/or where proximity to water table, open water, wells or personal bias dictates the maximum treatment of effluent.

Four options that will improve your system’s performance:

  1. Low flush toilets
  2. Biomat leach field systems
  3. Leach field pre-filter
  4. Aerobic septic tanks

Types of Sewage Treatment Systems

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 River

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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Over half of Save The River's budget comes from individual memberships and contributions. Supporting us with an annual membership donation will keep our River advocacy, education and research programs going strong.

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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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Clayton, NY 13624

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