Overall Rating Gold
Overall Score 72.07
Liaison Katie Koscielak
Submission Date May 7, 2020

STARS v2.2

Cal Poly Humboldt
OP-21: Water Use

Status Score Responsible Party
Complete 3.70 / 4.00 Andrea Alstone
Energy Planner & Analyst
Facilities Management
"---" indicates that no data was submitted for this field

Level of ”Physical Risk Quantity” for the institution’s main campus as indicated by the World Resources Institute Aqueduct Water Risk Atlas:

Total water withdrawal (potable and non-potable combined):
Performance Year Baseline Year
Total water withdrawal 41,300,622 Gallons 57,575,958 Gallons

Potable water use:
Performance Year Baseline Year
Potable water use 41,300,622 Gallons 57,575,958 Gallons

Start and end dates of the performance year and baseline year (or three-year periods):
Start Date End Date
Performance Period July 1, 2018 June 30, 2019
Baseline Period July 1, 2012 June 30, 2013

A brief description of when and why the water use baseline was adopted:

We are using 2012-13 as our baseline because it was used in our last STARS report. It was chosen then because California started mandated drought reductions based on usage for the year 2013; the academic year 2012-13 is the closest similar measure to this time frame.

Figures needed to determine "Weighted Campus Users":
Performance Year Baseline Year
Number of students resident on-site 2,089 2,013
Number of employees resident on-site 6 5
Number of other individuals resident on-site 5 0
Total full-time equivalent student enrollment 7,353 7,618
Full-time equivalent of employees 1,252 1,168
Full-time equivalent of students enrolled exclusively in distance education 106 30.33
Weighted campus users 6,903 7,071.25

Potable water use per weighted campus user:
Performance Year Baseline Year
Potable water use per weighted campus user 5,983.00 Gallons 8,142.26 Gallons

Percentage reduction in potable water use per weighted campus user from baseline:

Gross floor area of building space:
Performance Year Baseline Year
Gross floor area 1,999,609 Gross Square Feet 1,995,999 Gross Square Feet

Potable water use per unit of floor area:
Performance Year Baseline Year
Potable water use per unit of floor area 20.65 Gallons / GSF 28.85 Gallons / GSF

Percentage reduction in potable water use per unit of floor area from baseline:

Area of vegetated grounds:
Performance Year Baseline Year
Vegetated grounds 614.79 Acres 614.79 Acres

Total water withdrawal per unit of vegetated grounds:
Performance Year Baseline Year
Total water withdrawal per unit of vegetated grounds 67,178.42 Gallons / Acre 93,651.42 Gallons / Acre

Percentage reduction in total water withdrawal per unit of vegetated grounds from baseline:

A brief description of the institution's water-related behavior change initiatives:

Starting after the baseline year, HSU initiated a couple of key activities of this type that still continue: 1) Green Campus students installed stickers on all soap dispensers on campus indicating a Soap On/Water Off awareness to have water off while soaping up to conserve water and they continue to remind users during their outreach events; 2) Green Campus incorporated regular residence hall water conservation competitions to raise awareness of students to the impact they can have on conservation efforts; 3) All power-washing by maintenance/facilities staff became an evaluation decision to balance safety/aesthetic/maintenance concerns with water conservation considerations; 4) Irrigation of landscaped areas have been examined to more closely monitor environmental conditions and plant needs to better adjust watering schedules to avoid overwatering; 5) Major water line leak detection and repair has been a focus of O&M staff to identify and correct suspected occurrences.

A brief description of the institution's water recovery and reuse initiatives:

HSU does not have access to reclaimed water and limited opportunity to capture rainwater. There are two rainwater catchment systems active on campus, one at the Campus Center for Appropriate Technology, and the other integrated into the Behavioral and Social Sciences building. CCAT’s system consists of a 1500-gallon tank capturing roof gutter water from the CCAT house, which is used to water their edible landscape. The BSS building system also captures roof water and stores it in a 20,000-gallon system for use in the toilets and urinals in the building.

A brief description of the institution's initiatives to replace plumbing fixtures, fittings, appliances, equipment, and systems with water-efficient alternatives:

These reduction activities have likely had the largest volume effect on water use for HSU. All feasible sink faucet aerators were replaced with 0.5 GPM units, toilet valves set to 1.5 GPF, urinals to a maximum of 1.0 GPF, and shower heads meeting the 2.0 GPM rate. In addition, as remodels of campus have occurred or broken fixtures replaced, new fixtures with the latest water use standards are installed, per the CALGreen building standards of 2018. Campus has also actively fixed or bypassed several irrigation and domestic water underground leaks and systematically reduced irrigation use. Many of these separate measures are hard to quantify because our campus has lacked sub-metering on most lateral systems until 2019, when the first phase of building level metering was started. In the future, we hope to be able to better quantify individual efforts.

Website URL where information about the institution’s water conservation and efficiency efforts is available:

Additional documentation to support the submission:

Water consumption data compiled from bills generate by City of Arcata, municipal water provider to main campus, City of Trinidad, provider for remote campus buildings located there and City of Eureka, for remote buildings there.

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.