This inventory includes emissions of coarse particulate matter <10 µm in diameter (PM10), fine particulate matter < 2.5 µm (PM2.5), nitrogen oxides, sulfur oxides, and ammonia. Emissions are calculated for both Maricopa County and the PM10 nonattaiment area. Annual totals as well as typical daily emissions are provided for all source categories.

The purpose of the ambient air monitoring network is to sample air pollution in a variety of settings, assess the health and welfare effects, and assist in determining sources of air pollution. In general, six basic monitoring objectives and five measuring scales are used to determine the network design. Since it is physically and fiscally impossible to monitor the air in every location, representative samples must be obtained. These samples are determined by using the monitoring objectives and the spatial measurement scales. The network must be dynamic enough to maintain a current representative sample of the air quality. Air quality issues such as eight-hour ozone non-attainment boundaries and permits for new sources are diverse and controversial subjects for the citizens of Maricopa County. With its robust air monitoring network and mobile monitoring tools, the department strives to provide the most reliable and relevant air monitoring data to the public.

The purpose of this study was to develop a multi-modal transportation plan that outlines the region’s transportation priority projects and provides a plan for ultimate implementation. The transportation study was focused around identifying regional mobility needs that can accommodate the anticipated future population and employment growth. This transportation study is a joint effort of Navajo County, the City of Holbrook, the City of Winslow and the Arizona Department of Transportation to develop multi-modal transportation recommendations for the study area, Heber-Overgaard, Holbrook and Winslow over a 20-year planning horizon.

The Yuma Regional Transit Study identifies transit needs within southwestern Yuma County and presents recommended transit system improvements based on three funding scenarios. This study examined current and projected population, demographics, and employment for the region, conducted extensive public outreach and data collection, identified transit deficiencies and developed recommended transit improvements based on the identified deficiencies.

This Campaign Effectiveness Study, conducted for the Pima County Department of Environmental Quality, was designed to evaluate the specific effectiveness of the 2013-2014 Clean Air and Clean Stormwater Program Campaigns. This project analyzed and tracked the overall effectiveness of the Clean Air Program after 24 campaign sessions. For the second consecutive year, the survey also measured and tracked attitudes, knowledge, awareness, and behaviors related to stormwater management for the Clean Stormwater Program Campaign.

This Campaign Effectiveness Travel Behavioral Study, conducted for the Pima County Department of Environmental Quality, was designed to evaluate the specific effectiveness of the 2012-2013 Clean Air Campaign, as well as analyze the overall effectiveness of the air quality media campaign after 23 campaign sessions. New to the current study, the survey also measured baseline awareness/knowledge related to storm water and hazardous waste issues.

Pima County, in partnership with the National Park Service, has been an active participant in the development of a 70 mile segment of the trail. With the preparation of this Master Plan, Pima County has embarked on an active program to acquire the necessary rights-of-way and easements and to construct the Pima County segment of the national historic trail.

In 1992, Graham County conducted a transportation study for the Gila Valley Region. This study prepared a long-range transportation plan and a transportation improvement program. Many of the improvements have been completed. The purpose of this study is to update the 1992 transportation plan and to address the current issues within the area.

The Graham County, Safford, Thatcher, Pima Small Area Transportation Study was initiated by Graham County, in conjunction with the Arizona Department of Transportation, to develop a countywide, long-range multimodal transportation plan for this growing rural Arizona community. The project sponsors selected the PB Americas team to conduct this study under the direction of a Technical Advisory Committee, which included representatives from Graham County, City of Safford, Town of Thatcher, Town of Pima, Southeastern Arizona Governments Organization, and ADOT.