Northern Arizona University
OP-1: Emissions Inventory and Disclosure
| Status | Score | Responsible Party |
|---|---|---|
|
2.79 / 3.00 |
Dayna
McKay Data Analyst Office of Sustainability |
Has the institution conducted a GHG emissions inventory within the previous three years that includes all Scope 1 and 2 emissions? :
A copy of the most recent GHG emissions inventory:
A brief description of the methodology and/or tool used to complete the GHG emissions inventory:
NAU employs SIMAP for calculating annual emission reports. Our emissions are reported either annually or bi-annually via Second Nature.
The emissions reporting covers the following scopes:
Scope 1: It includes the analysis of natural gas usage and the assessment of vehicle miles traveled for each campus vehicle type.
Scope 2: This comprises data from purchased electricity.
Scope 3: The reporting incorporates NAU (p-card) purchasing data, student commuting, and operational waste.
Refrigerants are not included. We were unable to complete a refrigerant inventory this year, however, our previous inventory using refrigerant data from 2017-2022 calculated average annual refrigerant emissions as:
- Campus HVAC: 43.80573523 MTCO2E
- Campus Dining: 128.773 MTCO2E
- Window AC Units: 49.383 MTCO2E
- Mobile Vehicle AC: 315.12 MTCO2E
These emissions are not material and have been omitted from the report. However, we will begin to implement further refrigerant auditing in the future.
Has the GHG emissions inventory been validated internally by personnel who are independent of the GHG accounting and reporting process and/or verified by an independent, external third party?:
A brief description of the GHG inventory verification process:
Emissions data reviewed by Assistant Manager for Commissioning & Controls, Jordan Sundin. Although our review process was in person, and corrections were made verbally, meeting minutes were attatched as proof of the occurence. The minutes include the names of meeting atendees, as well as the corrections that were adressed.
Documentation to support the GHG inventory verification process:
Gross Scope 1 GHG emissions, performance year:
| Weight in MTCO2e | |
| Stationary combustion | 20,626.27 Metric tons of CO2 equivalent |
| Other sources (mobile combustion, process emissions, fugitive emissions) | 1,675.45 Metric tons of CO2 equivalent |
Total gross Scope 1 GHG emissions, performance year:
Gross Scope 2 GHG emissions, performance year (market-based):
| Weight in MTCO2e | |
| Imported electricity | 23,751.86 Metric tons of CO2 equivalent |
| Imported thermal energy | 0 Metric tons of CO2 equivalent |
Total gross Scope 2 GHG emissions, performance year:
Gross GHG emissions from biogenic sources, performance year:
Does the GHG emissions inventory include Scope 3 emissions from the following sources?:
| Yes or No | Weight in MTCO2e | |
| Business travel | No | --- |
| Commuting | Yes | 2,338.08 Metric tons of CO2 equivalent |
| Purchased goods and services | Yes | 36,530.61 Metric tons of CO2 equivalent |
| Capital goods | --- | --- |
| Fuel- and energy-related activities not included in Scope 1 or Scope 2 | Yes | 8,350.91 Metric tons of CO2 equivalent |
| Waste generated in operations | Yes | 3,525.70 Metric tons of CO2 equivalent |
| Other sources | --- | --- |
Total Scope 3 GHG emissions, performance year:
A brief description of how the institution accounted for its Scope 3 emissions:
We have begun to incorporate our scope 3 purchasing data into our annual emissions reporting. This inclusion has proven to be vital, as it accounts for 37.2% of our total emissions. We have a CSS graduate student working with this data to identify key areas of our purchasing behavior that require action due to their massive scope III emissions, including upstream and downstream emissions.
Has the institution completed an inventory within the previous three years to quantify its air pollutant emissions?:
Annual weight of emissions for::
| Weight of Emissions | |
| Nitrogen oxides (NOx) | 54.31 Tons |
| Sulfur oxides (SOx) | --- |
| Carbon monoxide (CO) | --- |
| Particulate matter (PM) | --- |
| Ozone (O3) | --- |
| Lead (Pb) | --- |
| Hazardous air pollutants (HAPs) | --- |
| Ozone-depleting compounds (ODCs) | --- |
| Other standard categories of air emissions identified in permits and/or regulations | 487.91 Tons |
Do the air pollutant emissions figures provided include the following sources?:
| Yes or No | |
| Major stationary sources | Yes |
| Area sources | --- |
| Mobile sources | Yes |
| Commuting | Yes |
| Off-site electricity production | --- |
A brief description of the methodology(ies) the institution used to complete its air emissions inventory:
NAU uses SIMAP for air pollutant quantities as well.
Gross Scope 2 GHG emissions from purchased electricity (location-based):
Gross Scope 2 GHG emissions from imported thermal energy (location-based) :
Website URL where information about the institution’s emissions inventories is available:
Additional documentation to support the submission:
Data source(s) and notes about the submission:
Emissions numbers are from fiscal year 2023 via SIMAP and the Second Nature progress report.
Information gathered by dayna.cook@nau.edu
Refrigerants are not currently included.
No fertilizer use: ATC is the only remaining fully non-artificial field, along with 1/4 of the Observatory Field Complex.
Emissions numbers are from fiscal year 2023 via SIMAP and the Second Nature progress report.
Information gathered by dayna.cook@nau.edu
Refrigerants are not currently included.
No fertilizer use: ATC is the only remaining fully non-artificial field, along with 1/4 of the Observatory Field Complex.
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.