Overall Rating Gold
Overall Score 72.81
Liaison Ian Johnson
Submission Date March 4, 2022

STARS v2.2

Colorado College
IN-24: Natural Wastewater Systems

Status Score Responsible Party
Complete 0.50 / 0.50 Ian Johnson
Sustainability Director
Office of Sustainability
"---" indicates that no data was submitted for this field

Estimated percentage of the institution’s wastewater treated and managed on-site using natural wastewater systems:

A brief description of the institution’s natural wastewater systems and technologies:

Colorado College employs Colorado Springs Utilities (CSU) to handle its wastewater. CSU exceeds its permit requirements to ensure that water is treated in a way that minimizes potential harm to local waterways. As a secondary treatment to wastewater, CSU employs the use of bacteria and other microorganisms which are fed oxygen which allows them to grow and consume other organic materials. Nitrifiers convert ammonia into nitrogen gas while other micro-organisms aid in the removal of phosphorous. All micro organisms are then removed through settled and are reused time and time again. The facility utilizes ultraviolet (UV) light to disinfect wastewater, which eliminates bacteria and enhances the quality of wastewater discharge. The treatment plant has adapted these methods to replace its previous use of gaseous chlorine.

Website URL where information about the natural wastewater systems is available:

Additional documentation to support the submission:

The information presented here is self-reported. While AASHE staff review portions of all STARS reports and institutions are welcome to seek additional forms of review, the data in STARS reports are not verified by AASHE. If you believe any of this information is erroneous or inconsistent with credit criteria, please review the process for inquiring about the information reported by an institution or simply email your inquiry to stars@aashe.org.