FY2324 MOWING DOWN POLLUTION WORK PLAN.PDF

Maricopa County — Formal (2022-06-08)

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Maricopa County Air Quality Department 
Phone: 602.506.6010 
Email: AQmail@mail.maricopa.gov 
 
Maricopa.gov/AQ 
CleanAirMakeMore.com 
Lawn Mower Program Work Plan 
 
 
 
 
 
 
 
Page 1 of 6 
 
 FY23/24 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 
 
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.  
 
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.

Lawn Mower Program Work Plan 
 
 
 
 
 
 
Page 2 of 6  
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 FY22.  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 
FY23 & 24 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 currently Home Depot staff. 
07/01/2022 
06/30/2024 
Outreach  
Continue existing outreach efforts for residential mowers and 
residential and commercial garden devices.   
Explore new methods to attract commercial participants. 
07/01/2022 
06/30/2024 
Collecting and evaluating applications and issuing 
vouchers 
07/01/2022 
06/30/2024 
 
Monthly Progress Reports: 
1. Synopsis of program activities for the past month 
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  
 
Monthly reports shall be sent to Arizona Department of 
Environmental Quality by the 15th day of the month following 
program operation. 
 
7/01/2022 
 
6/30/2024

Lawn Mower Program Work Plan 
 
 
 
 
 
 
Page 3 of 6  
 
 
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 FY22 program be carried over into FY23 and 24.  The remaining 
program voucher funding balance is estimated to be approximately $234,806 at the 
end of FY22. 
 
 
 
 
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 
7/01/2022 
12/1/2024 
 
Yearly 
Reports: 
Dec 1, 2023 
Dec 1, 2024

Lawn Mower Program Work Plan 
 
 
 
 
 
 
Page 4 of 6  
Estimated program usage based on past annual program participation 
FY23  
 
 
Device 
Expected Voucher Usage 
Total Annual 
Cost 
 
 
 
Residential Mower Replacement 
184 @ $150 each  
$27,600 
Residential Garden Device 
38 @ $50 each  
$1,900 
Commercial Garden Device 
20 @ $50 each  
$1,000 
 
FY23 Estimated funding usage 
$30,500 
 
Total remaining FY22 funding available 
$234,806 
 
REMAINING FY23 voucher funds 
$204,306 
Estimated FY24 
 
 
Device 
Expected Voucher Usage 
Total Annual 
Cost 
Residential Mower Replacement 
300 @ $150 each  
$45,000 
Residential Garden Device 
50 @ $50 each 
$2,500 
Commercial Garden Device 
50 @ $50 each 
$2,500 
 
*FY24 Estimated funding usage 
$50,000 
 
Remaining FY23 funds (estimated) 
$204,306 
 
NEW FY24 voucher funds 
$0 
 
Remaining FY24 voucher funds 
$154,306 
 
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 two years 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.