There are three types of sites or activities governed by Maricopa County dust control regulations. If you have any questions about whether your site or activities are covered by these regulations, please call 602-506-6010.
Dust control certifications are required in order to engage in many dust-generating activities. Visit our Dust Control Training page to learn more, or to find out if you need dust control certification.
Traditional Dust-Generating Activities (Rule 310)
Any activity capable of generating fugitive dust (such as construction, earthmoving, demolition, or weed abatement), regardless of the size of the site, must comply with Rule 310 and control potential dust.
In addition, a Dust Control Permit is required by Rule 310 (PDF) for many types of sites, such as:
- Activities that will disturb a surface area equal to or greater than 0.1 acre
- Bulk material handling
- The demolition of buildings
Non-Traditional Dust-Generating Activities (Rule 310.01)
Sources of dust which must comply with Rule 310.01 (PDF) include:
- Vehicle use in open areas and vacant lots
- Open areas and vacant lots
- Unpaved parking lots
- Unpaved roadways (including alleys)
- Livestock activities
- Erosion-caused deposition of bulk materials onto paved surfaces
- Easements, rights-of-way, and access roads for utilities (transmission of electricity, natural gas, oil, water, and gas)
Gravel, Concrete, Asphalt & Related Activities (Rule 316)
Processing plants that mine, excavate, separate, combine, crush or grind any nonmetallic mineral are governed by Rule 316. ‘Nonmetallic minerals’ includes (but is not limited to) crushed and broken stone, sand and gravel, clay, rock salt, gypsum, sodium compounds, and mixtures of these minerals such as concrete and asphalt.
Some types of facilities or activities governed by Rule 316 are:
- Crushing and screening of nonmetallic minerals
- Sand and gravel operations
- Asphalt plants
- Concrete batch plants
For more information, consult the Rule 316 Handbook (PDF).