Need a Phase I or Phase II ESA in Maricopa County, AZ? Maricopa County has about 4,673,096 residents (2024 estimate) and 24 incorporated cities and towns. Describe your project once: environmental consultants who work in Maricopa County get back to you.
State environmental agency records for Maricopa County are part of what the consultant reviews.
Services available in Maricopa County
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Phase I Environmental Site Assessment
Records review, site visit and interviews to ASTM E1527 by an Environmental Professional, for a purchase or a loan.
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Phase II Environmental Site Assessment
Soil, groundwater or vapor sampling when a Phase I identifies a recognized environmental condition.
Frequently asked questions in Maricopa County
Do environmental consultants cover the whole of Maricopa County?
Most pros work across the county and neighboring counties. Enter your ZIP code in the form and we match you with pros who serve your exact area.
Phase I Environmental Site Assessment in Arizona: all counties
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.