| Overall Rating | Gold |
|---|---|
| Overall Score | 69.84 |
| Liaison | Zachary Czuprynski |
| Submission Date | Jan. 21, 2025 |
Prescott College
OP-3: Water Use
| Status | Score | Responsible Party |
|---|---|---|
|
4.05 / 7.00 |
Zachary
Czuprynski Sustainability Coordinator Green Mountain Center for Sustainablity |
3.1 Potable water use per person
Performance year for water use:
Peer group:
Potable water from off-site sources:
Reclaimed water from off-site sources:
Other off-site water sources:
Potable water from on-site sources:
Other on-site water sources:
Full-time equivalent student enrollment:
Full-time equivalent of employees:
The Reporting Tool will automatically calculate the following four figures:
Full-time equivalent students and employees:
Annual potable water use per person:
Points earned for indicator OP 3.1:
3.2 Potable water use per square meter
The Reporting Tool will automatically calculate the following two figures:
Points earned for indicator OP 3.2:
3.3 Systems for water recovery and return
Narrative and/or website URL providing an overview of the institution’s on-site rainwater harvesting systems:
Inventory of rainwater storage and uses
Does the institution recover water on-site for reuse?:
Narrative and/or website URL providing an overview of the institution’s on-site water recovery and reuse systems:
Does the institution collect and return water to surface water or groundwater through on-site green infrastructure?:
Narrative and/or website URL providing an overview of the institution’s on-site green infrastructure:
All parking lot upgrades have included bioswales, retention basins, and bioremediation pits to increase infiltration and capture residual oil to prevent groundwater pollution of nearby waterways. At the bottom of the evaluation gradient from a parking lot is a rainwater garden to slow down surface water and allow it to infiltrate and bioremediate before entering the nearby Butte Creek. Campus landscaping uses swales to passively direct rainwater to vegetation throughout campus. There are also several small wetland retention basins.
The Reporting Tool will automatically calculate the following figure:
3.4 Ratio of water recovered/returned to total water withdrawal
Narrative outlining the methodologies used to estimate or model the annual volume of water recovered and/or returned on-site:
Using Yavapai County GIS, we calculated the campus areas with green infrastructure (extended only to the property boundaries of campus). We then used a simple rainwater harvesting calculation (V = R*A*k*e) to estimate the amount of rainwater runoff that is captured by campus green infrastructure, changing parameter (e) dependent on the porosity of ground material (e.g., pavement vs soil). On-campus green infrastructure includes permeable pavement, rain gardens, basins, and bioswales; the total area of these constitutes A. Conversion factor k is 7.48 gal/cub ft, and R is the annual average rainfall in Prescott, Arizona, which is 17.95 inches per year. The product is then converted to square meters for final reporting.
Sources:
Rainwater Collection Efficiency of paved areas
Prescott, Arizona climate data
Estimated volume of rainwater harvested on-site for storage and use:
Estimated volume of water recovered on-site for reuse:
Estimated volume of water collected and returned through on-site green infrastructure:
The Reporting Tool will automatically calculate the following four figures:
Total water withdrawal:
Ratio of water recovered/returned to total water withdrawal:
Points earned for indicator OP 3.4:
Optional documentation
As with other credits that use per-person calculations, we reported the number of FTE students and employees on campus, which is significantly different from our PRE-3 numbers due to the number of students enrolled in distance education.
Additional documentation for this credit:
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.