FY25 MCMOW WORK PLAN.PDF

Maricopa County — Formal (2024-06-12)

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Finance Unit 
301 W. Jefferson St., Suite 410  
Phoenix, Arizona 85003 
 
P: 602-506-6010 
E: AQFinance@maricopa.gov 
 
 
 
 
 
 
 
 
 
 
 
 
 
FY25 VOLUNTARY LAWN AND GARDEN EMISSIONS 
REDUCTION PROGRAM WORK PLAN - 
Mowing Down Pollution  
 
MARICOPA COUNTY AIR QUALITY GOALS AND PRIORITIES  
Maricopa County continues to experience an expanding residential housing market and 
therefore, the usage of lawn and garden equipment play a notable role in the emissions profile 
of the County. Emissions from lawn and garden equipment are responsible for a considerable 
amount of all non-road emissions. Currently, the County is in non-attainment for ozone, for 
which the precursors are nitrogen oxides (NOx) and volatile organic compounds (VOC). 
According to the Maricopa County 2017 Ozone Periodic Emission Inventory, the lawn and 
garden equipment category accounts for 2.99% of all non-road NOx emissions and 34.47% of 
all non-road VOC emissions. The County was previously in non-attainment for carbon monoxide 
(CO) and 43.24% of nonroad CO emissions can also be attributed to lawn and garden 
equipment.  
 
2017 Emissions from non-road lawn and garden equipment, as a percentage of:  
  
VOC 
CO 
NOx 
All non-road emissions 
34.47% 
43.24% 
2.99% 
 
 
LAWN AND GARDEN EQUIPMENT AND TECHNOLOGIES  
According to the EPA, approximately 121 million pieces of lawn and garden equipment are 
estimated to be in use in the United States of which, lawn mowers are the most numerous.1 The 
advent of new four-stroke mowers has created improvements in terms of efficiency as well as 
reduced emissions, however, older two-stroke mowers are still in operation and most lack any 
type of emission control technology. The replacement of gasoline powered lawn mowers with 
an electric equivalent will reduce the aforementioned pollutants as well as eliminate some of 
the indirect air pollution that comes along with maintaining and operating a gas-powered unit. 
The EPA estimated that approximately 70,000 tons of gasoline was spilled in 2005 while 
refueling non-road equipment using portable fuel containers, which resulted in additional VOC 
emissions.2 
 
1 Banks, J. L., PhD, & McConnell, R. (n.d.). National Emissions from Lawn and Garden Equipment (Environmental Protection 
Agency). Retrieved December 18, 2017 
2 Environmental Protection Agency. (2012, June 8). Estimating emissions associated with portable fuel containers (PFCs). 
Retrieved December 18, 2017.

Page 2 of 4 
Electric lawn mowers and other electric lawn equipment have come a long way in the past 
decade. Their rising popularity has motivated some of the more prominent manufactures in the 
industry to develop cost effective options that are well within the grasp of the average 
consumer. Technological advancements in lithium batteries have closed the performance gap 
between electric and gas-powered counterparts. Cordless options are also becoming more 
standardized, allowing for more user-friendly operations.  
 
ROLES AND RESPONSIBILITIES  
Maricopa County Air Quality Department (MCAQD) will be responsible for the overall 
administration, management and implementation of the Voluntary Lawn and Garden Equipment 
Emissions Reduction Program in accordance with A.R.S §49-474.02.  MCAQD developed the 
program and launched it in June 2018 as the Mowing Down Pollution Program.  Operations 
include data and document collection, financial management, outreach, necessary 
coordination for the retirement of replaced equipment, and providing progress reporting as 
described in the table below. In addition to allowing for the retirement of residential lawn 
mowers, A.R.S §49-474.02 also allows for the retirement of commercial lawn mowers and 
residential and commercial lawn and garden devices. Lawn and garden devices include leaf 
blowers, trimmers, edgers, and other similar equipment.  Commercial devices were added to 
the program in FY24.  All mowers and garden devices are recycled once turned in.   
 
The MCAQD Director acts as the agent of the County for all emission reduction programs. 
Funds are managed by MCAQD Finance, which receives and processes invoices and payments. 
The Grants Programs Administrator will review and confirm allocation of expenses and ensure 
deliverables align with the project scope and budget. All invoices will be reviewed and approved 
by the Grants Programs Administrator.  Final authorization and the timely scheduling of 
payment will be completed by MCAQ Finance. 
 
TIMELINE AND MILESTONES 
FY25 Activity 
Start 
End 
Mowing Down Pollution Program 
Prior to start of each new FY, train program staff for 
launch on day one of new FY.  This includes Service 
Centers, Transfer Station, and Home Depot staff. 
07/01/2024 
06/30/2025 
Outreach  
Continue existing outreach efforts for residential 
mowers and residential and commercial garden 
devices.   
Explore new methods to attract commercial 
participants. 
07/01/2024 
06/30/2025 
Collecting and evaluating applications and issuing 
vouchers 
07/01/2024 
06/30/2025

Page 3 of 4 
 
 
Quarterly Progress Reports: 
1. Synopsis of program activities for the past 
quarter. 
2. Total number of voucher applications 
received per month. 
3. Breakdown of total number of vouchers 
issued per month for: 
a. residential lawn mowers 
b. residential handheld garden devices  
c. commercial handheld garden devices  
4. Total cost of program monies used to pay 
Home Depot 
 
Maricopa County shall submit the quarterly report 
within thirty (60) days of the end of the quarter. 
7/01/2024 
6/30/2025 
Prepare annual reports for program including the 
following items: 
1. The number of lawn mowers and other lawn and 
garden devices retired by brand and year of 
manufacture. 
2. The cost-effectiveness of the program in terms 
of dollars spent per ton of emissions 
reductions. 
3. Any recommendations for improving the 
effectiveness of the program. 
4. The administrative costs of the program.  
5. Total number of applications received by fiscal 
year. 
6. Breakdown of the total number of vouchers 
issued by fiscal year for: 
a. residential lawn mowers 
b. residential handheld garden devices  
c. commercial handheld garden devices  
7. Total tons of each pollutant reduced per year for 
volatile organic compounds, carbon monoxide, 
particulate matter, and oxides of nitrogen by 
fiscal year. 
8. Excel Spreadsheet with the following breakdown 
for each voucher issued: 
a. Device type (e.g., lawnmower, trimmer, 
chainsaw) 
b. Year of Manufacture 
c. Annual Usage 
d. Emission Factors 
7/01/2024 
12/1/2025 
 
Yearly 
Reports: 
Dec 1, 2025

Page 4 of 4 
ANTICIPATED PROGRAM PARTICIPATION AND MILESTONES 
 
The Mowing Down Pollution Program focuses on decommissioning old lawn and garden 
equipment as well as facilitating the ownership of new and cleaner operating equipment. The 
promotion of the program continues the Clean Air Make More website.  Program posts in both 
English and in Spanish are posted to social media sites.  Additional outreach occurs through 
monthly outreach events where program flyers are distributed in English and in Spanish.  
Additional commercial marketing is being explored.   
The program vendor is required to post program posters in all participating retail locations. 
 
PROGRAM BUDGET 
 
*For more efficient program budgeting, MCAQD is requesting that any remaining funds from 
the FY24 program be carried over into FY25.  The remaining program voucher funding balance 
is estimated to be approximately $167,975 at the end of FY24. 
 
Estimated program usage is based on past annual program participation. 
 
Estimated FY25 
 
 
Device 
Expected Voucher Usage 
Total Annual Cost 
Residential Mower Replacement 
120 @ $150 each  
$18,000 
Residential Garden Device 
30 @ $50 each 
$1,500 
Commercial Garden Device 
20 @ $50 each 
$1,000 
 
*FY25 Estimated funding usage 
$20,500 
 
Remaining FY24 funds (estimated) 
$167,975 
 
NEW FY25 voucher funds 
$0 
 
Remaining FY25 voucher funds 
$147,475 
 
 
 
 
 
SUSTAINABILITY OF THE PROGRAM  
 
MCAQD will continue to provide program outreach and management including associated 
costs.  Arizona Department of Environmental Quality will continue to support the program by 
providing voucher funding per a signed agreement.  It is anticipated that the Service Agreement 
will be amended every year or as needed to support the program.  MCAQD will continue to 
partner with additional county departments for mower/device collection and disposal.   
 
MCAQD intends to continue the use of current grant program software (Formstack) and 
associated established procedures for program application and tracking.