Sustainability

C. County Operations GHG Inventory

In 2021, Washoe County contracted Ledger8760 (now nZero) to track all energy use and emissions from County operations. nZero measures facility energy-use and cost data using data from the County’s electricity and gas meters. Per data industry best practices to calculate emissions, all GHG inventory and emissions calculations follow the internationally recognized GHG Protocol. See Appendix X for methodology details.

Washoe County selected 2021 as its baseline year for emissions calculations. Emissions reduction goals, e.g. “45% emissions reduction by 2030,” will be measured against 2021 emissions numbers. In 2021, Washoe County measured 23,866 metric tons (MT) of greenhouse gas (GHG) emissions. 8,349 (35%) of emissions were Scope 1, 12,091 (51%) were Scope 2, and 3,425 (14%) were Scope 3.

Figure 1: Washoe County emissions for 2021, our baseline year (Source: nZero)

As Figure 1 demonstrates, the County measures different categories of emissions, called Scopes:

Scope 1 – Direct Emissions

• Stationary Combustion (Natural gas)
• Mobile Combustion (Vehicle fleet)
• Fugitive Emissions from Refrigeration/AC

The dark blue in Figure 1 depicts all emissions from natural gas boilers and internal combustion engine (ICE)-powered fleet vehicles. Natural gas use is measured by natural gas meter readings using Washoe County’s Energy Manager software. Fleet fuel, mileage and utilization data are tracked using Flagship Fleet Management software.

Table 1 Scope 1 emissions from building heat and fleets

The County has not yet inventoried emissions from fugitive refrigerants. The County will develop an inventory protocol for these emissions in FY25 and develop a reduction plan by 2028.

Scope 2 – Indirect Emissions

• Purchased electricity, heat, steam, or cooling

The light blue in Figure 1 depicts all electricity sold by Nevada Energy (NVE) to power the County’s buildings, streetlights and other facilities. These data are based on metered electricity use as tracked by Energy Master software and confirmed by nZero.

Although the County manages more than 400 buildings and facilities, more than 90% of the County’s Scope 2 emissions come from 25 buildings and facilities:

Table 2 Scope 1 & 2 emissions for Washoe County facilities

Site Name	Electricity (Scope 2) GHG (MT)	Natural Gas GHG (MT)	Total GHG (MT)	% Emissions	Combined %
911 Parr - Consolidated Detention Facility	2,327.69	1,393.96	3,721.65	24.0%	24%
STMWRF unit @Mira Loma	2,944.61	0.14	2,944.75	19.0%	43.0%
Courts Bldg North Tower	1,128.67	250.97	1,379.64	8.9%	51.8%
Admin Complex ( 9th St. Bldg A-D)	772.88	267.15	1,040.03	6.7%	58.5%
Jan Evans Juvenile Center	423.92	386.92	810.84	5.2%	63.8%
Liberty Center	283.58	199.36	482.94	3.1%	66.9%
Courts Main - Old Jail - 75 Court	298.42	113.43	411.85	2.7%	69.5%
Fieldcreek Pump Station	384.65	0.00	384.65	2.5%	72.0%
Reoc Emergency Ops Ctr	347.62	31.69	379.31	2.4%	74.5%
Our Place	177.75	168.81	346.56	2.2%	76.7%
Longley Complex	155.74	190.12	345.86	2.2%	78.9%
Medical Examiner (9th St. Bldg F)	227.83	60.38	288.21	1.9%	80.8%
Downtown Reno Library	177.77	80.91	258.68	1.7%	82.4%
Rivermount Park	181.32	45.32	226.64	1.5%	83.9%
Rancho San Rafael Regional Park	122.59	102.20	224.79	1.4%	85.4%
Cold Springs WRF	220.48	0.00	220.48	1.4%	86.8%
Street Lights	205.45	0.00	205.45	1.3%	88.1%
Reno Senior Center (9th St. Bldg E)	125.38	65.39	190.77	1.2%	89.3%
Sierra View Library	114.93	0.00	114.93	0.7%	90.1%
Tech Services - Edison	81.49	17.64	99.13	0.6%	90.7%
North Valleys Regional Park	73.21	21.92	95.13	0.6%	91.3%
Sparks Justice Court	66.31	25.18	91.49	0.6%	91.9%
Spanish Springs Library	63.95	20.49	84.44	0.5%	92.5%
Lift Station - Steamboat	83.77	0.00	83.77	0.5%	93.0%
Kids Kottage Ii	44.98	33.88	78.86	0.5%	93.5%
South Valleys Library	51.06	24.58	75.64	0.5%	94.0%
Sparks Library	36.19	29.04	65.23	0.4%	94.4%
Northwest Library	39.88	24.45	64.33	0.4%	94.8%
Incline Roads Maintenance	60.36	0.00	60.36	0.4%	95.2%
Sober 24 Adult Services	50.12	10.12	60.24	0.4%	95.6%
Tb Clinic	32.74	27.50	60.24	0.4%	96.0%
Galena Creek Regional Park	54.94	0.00	54.94	0.4%	96.3%
Transitional Housing	30.74	22.25	52.99	0.3%	96.7%
Lemmon Valley WWT Plant	50.80	0.00	50.80	0.3%	97.0%
Bartley Ranch Regional Park	24.26	21.89	46.15	0.3%	97.3%
Incline Library	43.07	0.00	43.07	0.3%	97.6%
South Valleys Regional Park	42.29	0.00	42.29	0.3%	97.9%
Kids Kottage Activity Center	23.39	15.34	38.73	0.2%	98.1%
Public Administrator (new)	26.60	9.28	35.88	0.2%	98.3%
Bowers Mansion Regional Park	35.44	0.00	35.44	0.2%	98.6%
Incline Sheriff Substation	32.75	0.00	32.75	0.2%	98.8%
North Valley Library	18.98	11.33	30.31	0.2%	99.0%
Mcgee Child Advocacy Ctr (C.A.C.) At Kids Kottage	27.82	0.14	27.96	0.2%	99.2%
Liberty Center Parking Garage	26.64	0.00	26.64	0.2%	99.3%
Family Engagement Center - Social Services	17.06	8.94	26.00	0.2%	99.5%
Lazy 5 Regional Park	19.93	5.03	24.96	0.2%	99.7%
Sparks Senior Center	16.40	5.82	22.22	0.1%	99.8%
Lift Station - Woodland Village	15.72	0.00	15.72	0.1%	99.9%
Lift Station - Diamond Peak	15.52	0.00	15.52	0.1%	100.0%
Fleet			4,250.63
Totals	11,827.73	3,691.57	15,519.30	Goal:	8,535.62
Social Cost of Carbon (global cost of impacts)	$2,330,116	$771,842	$3,244,371

*Methodology note: For NVE-supplied energy, the annual average emission factor for 2021 is: 811.17 lbs/MWh (or 0.000368 MT CO2e/kWh). However, we are using a slightly lower emission factor that considers the time-of-use for most County operations (mainly during the day, when more solar production contributes to the grid) and the grid's carbon intensity for 2021. The emissions factor used for this inventory is: 803.74 lbs CO2e/MWh (or 0.000365 MT CO2e/kWh).

Scope 3 – Indirect Emissions

• Travel
• Employee Commuting
• Purchased goods
• Waste

The Scope 3 emissions depicted in peach in Figure 4 are incomplete. Scope 3 emissions are varied and diverse, and Washoe County has only recently begun to account for them. They include emissions associated with everything the County buys and throws away, as well as service contracts and employee business travel and commuting expenses. The full extent of Scope 3 emissions is still to be determined.

To date, the County has addressed Scope 3 emissions in the following ways:

• Washoe County conducted an employee commuting survey during the summer of 2023. With 1,040 responses out of ~3,000 employees, here are some notable results:
  • The average employee commute is 23 miles.
  • Commuting employees produced 2.8 mtCO2e, for a total of 8,400 mtCO2e for 2023.
  • 10.3% of employees commuted using alternative methods (bicycles, carpooling, public transit).

Scope 3 reduction strategies are discussed in our Facility Decarbonization Plan below [link]