Green Building, Green Building Projects, Bronx Zoo Eco-Restroom, Clivus Multrum Inc.
Bronx Zoo Eco-Restroom
Bronx, New York
Conservation in the City
The Bronx Zoo has been educating and entertaining visitors since 1899. The Zoo's 256 acres makes it the largest
urban zoo in the United States. It hosts two million visitors annually and is home to more than four thousand
animals. Owned and operated by the Wildlife Conservation Society, the Zoo has a strong focus on environmental
conservation. That focus has been applied to an interest in sustainable building practices at the Society's zoos.
The Best Solution
Restrooms near the Bronxdale entrance needed replacement due to a failing septic system. A new septic system at
the site was rejected due to concern over the potential for pollution to the nearby Bronx River. A sewer
connection was considered but was also abandoned due to the huge cost of tunneling under the Bronx River
Parkway. Instead, the Zoo decided to install Clivus Multrum Composting Toilet Systems. In addition to saving
money, the Clivus systems capture and recycle the nutrients in human waste and use only minimal water for flushing.
Eco Project of the Year
The Eco-Restroom accommodates more than ½ million visitors per year. Foam-flush toilets use only 6oz. of water per use, resulting in a savings of more than one million gallons of water each year, as compared to conventional
low-flow (1.6gpf) toilets. Because the Eco-Restroom also includes a greywater irrigation system, the
building manages all of its wastewater sustainably, onsite. The use of these technologies and others,
including a rainwater harvesting system, maximized natural daylighting, and efficient radiant floor
heating, contributed to the Eco-Restroom being named New York Construction's 2007 Eco Project of the Year.
- 10 commercial composters
- 15 Foam-flush toilets & 4 waterless urinals
- Greywater irrigation system
- Winner of New York Construction’s 2007 Eco Project of the Year
Case Study Feature Sheet Facility Profile