Overall Rating Gold
Overall Score 67.45
Liaison Benjamin Newton
Submission Date March 3, 2023

STARS v2.2

Central Community College
IN-24: Natural Wastewater Systems

Status Score Responsible Party
Complete 0.50 / 0.50
"---" 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:
The CCC-Kearney Center has five onsite natural wastewater bioretention gardens that help capture and treat storm water runoff before being slowly released through groundwater infiltration. The sediment traps help to collect silt/sediment at inflow pipes into basins. Although there are no current municipal requirements for water quality treatment, the natural wastewater bioretention gardens were sized to provide the water quality volume for 80% of the building site. Natural bioretention gardens mimic biological, chemical and physical processes of natural wetlands and our CCC Kearney gardens include native Nebraska plants that soak up water and allow infiltration to greater depths due to longer root structures.

Currently there are large swaths of low to mid-height native grass areas at all sites throughout the site to help absorb storm water runoff which lower the energy and labor inputs required for maintenance.

Also there are rain gardens on the Hastings and Columbus campuses that filter wastewater naturally and mimic wetlands as well that are similar to the CCC Kearney bioretention gardens, but are at a smaller scale.

Stormwater that usually is discharged through the conventional sewer infrastructure, is now filtered through bioretention gardens on campus and naturally infiltrates into the groundwater, which then discharges naturally to the Platte and Wood Rivers in Kearney and Grand Island. The Kearney Center building design does not have a conventional sewer system due to this natural infiltration of blackwater from the parking lots that contains oil and grease from vehicle parking lots. The native plants naturally filter out these blackwater contaminants and infiltrate into the groundwater table, which flows south to the Platte and Wood Rivers.

Website URL where information about the natural wastewater systems is available:
Additional documentation to support the submission:
Data source(s) and notes about the submission:
80% is for the Kearney Center to showcase natural wastewater systems for businesses and government agencies in Central Nebraska, other campuses also have smaller scale bioretention gardens.


Blackwater is runoff from parking lots as it contains contaminants of gas, oil, and grease that are naturally filtered out through bioretention ponds and rain gardens on campus.

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.