EPA-Approved Regulations for Maricopa County

EPA’s Pacific Southwest (Region 9) implements and enforces federal environmental laws in Arizona, California, Hawaii, Nevada, the Pacific Islands, and 148 Tribal Nations.

The following documents and tables contain EPA Approved Regulations for Maricopa County and are part of the Arizona State Implementation Plan (SIP). EPA's Pacific Southwest Office maintains these tables and will update them to reflect any changes the official tables codified in the Code of Federal Regulations. To find the status of SIP submittals, visit SIP Status Reports.

On this page:

Compiled Rules and Regulations, Guidance and Ordinances

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  • EPA Approved and Compiled Rules and Regulations: Maricopa County APCD (pdf) (18.13 MB, January 24, 2025)
    EPA approved and compiled rules and regulations of the Maricopa County portion of the Arizona State Implementation Plan (SIP).
  • Application for Dust Control Permit (Maricopa County) (pdf) (124.33 KB, September 2017)
    Relates to Rule 310 ("Fugitive Dust from Dust-Generating Operations"). Element of the Revised PM-10 State Implementation Plan for the Salt River Area, Additional Materials, September 2005. Submitted on November 29, 2005.
  • Guidance for Application for Dust Control Permit (pdf) (256.16 KB, September 2017)
    Relates to Rule 310 ("Fugitive Dust from Dust-Generating Operations"). Element of the Revised PM-10 State Implementation Plan for the Salt River Area, Additional Materials, September 2005. Submitted on November 29, 2005.
  • Maricopa County Ordinance P-26 (pdf) (145.89 KB, October 23, 2019)
    Maricopa County Residential Woodburning Restriction Ordinance P-26.
  • City of Mesa Ordinance No. 3434 (pdf) (1.42 MB, February 2, 1998)
    An Ordinance of the City Council of the City of Mesa, Maricopa County, Arizona, Relating to Fireplace Restrictions Amending Title 4, Chapter 1, Section 2 Establishing a Delayed Effective Date; and Providing Penalties for Violations.
  • City of Phoenix Ordinance No. G4037 (pdf) (1.53 MB, July 2, 1997)
    An Ordinance Amending Chapter 39, Article 2, Section 39-7 of the Phoenix City Code by Adding Subsection G Relating to Dust Free Parking Areas; and Amending Chapter 36, Article XI, Division I, Section 36-145 of the Phoenix City Code Relating to Parking on Non-Dust Free Lots.
  • City of Phoenix Ordinance No. G4062 (pdf) (1.31 MB, December 10, 1997)
    An Ordinance Amending the Phoenix City Code By Adding A New Chapter 40 “Environmental Protections,” By Regulating Fireplaces, Wood Stoves and Other Solid-Fuel Burning Devices and Providing that the Provisions of this Ordinance Shall Take Effect on December 31, 1998.
  • City of Tolleson Ordinance No. 376, N.S. (pdf) (1018.02 KB, December 8, 1998)
    An Ordinance of the City of Tolleson, Maricopa County, Arizona, Amending Chapter 7 of the Tolleson City Code by Adding a New Section 7-9, Prohibiting the Installation or Construction of a Fireplace or Wood Stove Unless It Meets the Standards Set Forth Herein (including Exhibit A).
  • Maricopa County Ordinance P-7 (pdf) (3.08 MB, May 26, 1994)
    Maricopa County Trip Reduction Ordinance No. P-7.
  • Town of Carefree Ordinance No. 98-14 (pdf) (1.25 MB, September 3, 1998)
    An Ordinance of the Town of Carefree, Maricopa County, Arizona, Adding Section 10-4 to the Town Code Relating to Clean-Burning Fireplaces, Providing Penalties for Violations.
  • Town of Gilbert Ordinance 1066 (pdf) (2.57 MB, November 25, 1997)
    An Ordinance of the Common Council of the Town of Gilbert, Arizona Amending the Code of Gilbert by Amending Chapter 30 Environment, by adding New Article II Fireplace Restrictions Prescribing Standards for Fireplaces, Woodstoves, and Other Solid-Fuel Burning Devices in New Construction; Providing for an Effective Date of January 1, 1999; Providing for Repeal of Conflicting Ordinances; Providing for Severability.
  • Town of Paradise Valley Ordinance Number 450 (pdf) (1.29 MB, December 18, 1997)
    An Ordinance of the Town of Paradise Valley, Arizona, Adding Section 5-1-7 to the Town Code Relating to Clean-Burning Fireplaces, Providing Penalties for Violations.
  • Town of Paradise Valley Ordinance Number 454 (pdf) (2.51 MB, January 22, 1998)
    An Ordinance of the Town of Paradise Valley, Arizona, Relating to Grading and Dust Control, Amending Article 5-13 of the Town Code and Sections 5-13-1 Through 5-13-5, Providing Penalties for Violations and Severability.

EPA-Approved Maricopa County Air Pollution Control Regulations

Pre-July 1988 Rule Codification

Regulation III - Control of Air Contaminants

County Citation Title/Subject State Effective Date EPA Approval Date Additional Explanation
Rule 34 (paragraphs F, G, H, I, J and K only) Organic Solvents – Volatile Organic Compounds (VOC) June 23, 1980 May 5, 1982, 47 FR 19326 Submitted on June 23, 1980. EPA approved the rescission of paragraphs A, D.1, E.1, E.3 and L. Paragraphs B and C were superseded by approval of Maricopa Rule 331; paragraph D.2 was superseded by approval of Maricopa Rule 333; paragraph E.2 was superseded by approval Maricopa Rule 335; and paragraph E.4 was superseded by approval of Maricopa Rule 336.
Rule 35 Incinerators August 12, 1971 July 27, 1972, 37 FR 15080 Superseded by approval of Maricopa Rule 313 published on September 25, 2014, except for Hospital/Medical/Infectious Waste Incinerators. Submitted on May 26, 1972.

Post-July 1988 Rule Codification

Regulation I - General Provisions

County Citation Title/Subject State Effective Date EPA Approval Date Additional Explanation
Rule 100 General Provisions and Definitions August 9, 2023 April 4, 2024, 89 FR 23521 Submitted on August 23, 2023

Regulation II - Permits and Fees

County Citation Title/Subject State Effective Date EPA Approval Date Additional Explanation
Rule 200 Permit Requirements December 11, 2019 February 15, 2022, 87 FR 8418 Submitted on December 20, 2019.
Rule 210 Title V Permit Provisions December 11, 2019 February 15, 2022, 87 FR 8418 Submitted on December 20, 2019.
Rule 220 Non-Title V Permit Provisions December 11, 2019 February 15, 2022, 87 FR 8418 Submitted on December 20, 2019.
Rule 240 (except Section
304.4.e.(1))		 Federal Major New Source Review (NSR) December 11, 2019 February 15, 2022, 87 FR 8418 Submitted on December 20, 2019.
Rule 241 Minor New Source Review (NSR) December 11, 2019 February 15, 2022, 87 FR 8418 Submitted on December 20, 2019.
Rule 242 Emissions Offsets Generated by the Voluntary Paving of Unpaved Roads June 20, 2007 August 6, 2007, 72 FR 43538 Submitted on July 5, 2007.

Regulation III - Control of Air Contaminants

County Citation Title/Subject State Effective Date EPA Approval Date Additional Explanation
Rule 300 Visible Emissions March 12, 2008 July 28, 2010, 75 FR 44141 Submitted on July 10, 2008.
Rule 310 Fugitive Dust From Dust-Generating Operations January 27, 2010 December 15, 2010, 75 FR 78167 Submitted on April 12, 2010. Cites appendices C and F, which are listed separately in this table.
Rule 310.01 Fugitive Dust from Non-Traditional Sources of Fugitive Dust January 27, 2010 December 15, 2010, 75 FR 78167 Submitted on April 12, 2010. Cites appendix C, which is listed separately in this table.
Rule 311 Particulate matter from process industries August 2, 1993 April 10, 1995, 60 FR 18010. Vacated by Ober decision. Restored August 4, 1997, 62 FR 41856 Submitted on March 3, 1994.
Rule 312 Abrasive Blasting July 13, 1988 January 4, 2001, 66 FR 730 Submitted on January 4, 1990.
Rule 313 Incinerators, Burn-Off Ovens and Crematories May 9, 2012 September 25, 2014, 79 FR 57445 Submitted on August 27, 2012.
Rule 314 Open Outdoor Fires and Indoor Fireplaces at Commercial and Institutional Establishments October 23, 2019 April 14, 2022,87 FR 22135 Submitted November 20, 2019
Rule 316 Nonmetallic Mineral Processing November 7, 2018 7/15/2020, 85 FR 42726 Submitted on November 19, 2018.
Rule 318 Approval of Residential Woodburning Devices April 21, 1999 November 8, 1999, 64 FR 60678 Submitted on August 4, 1999.
Rule 320,
Section 306		 Odors and Gaseous Air Contaminants, Limitation-Sulfur from Other Industries July 2, 2003 August 20, 2024, 89 FR 67301 Submitted on November 13, 2023.
Rule 320,
Section 307		 Odors and Gaseous Air Contaminants, Operating Requirements-Asphalt Kettles and Dip Tanks July 2, 2003 August 20, 2024, 89 FR 67301 Submitted on November 13, 2023.
Rule 322 Power Plant Operations June 23, 2021 December 30, 2022, 87 FR 80462 Submitted on June 30, 2021, under an attached letter dated June 24, 2021.
Rule 323 Fuel Burning Equipment from Industrial/Commercial/Institutional (ICI) Sources June 23, 2021 February 7, 2023, 88 FR 7879 Submitted on June 30, 2021, under an attached letter dated June 24, 2021.
Rule 324 Stationary Reciprocating Internal Combustion Engines (RICE) June 23, 2021 February 7, 2023, 88 FR 7879 Submitted on June 30, 2021, under an attached letter dated June 24, 2021.
Rule 331 Solvent Cleaning April 21, 2004 December 21, 2004, 69 FR 76417 Submitted on July 28, 2004.
Rule 333 Petroleum Solvent Dry Cleaning June 19, 1996 February 9, 1998, 63 FR 6489 Submitted on February 26, 1997.
Rule 335 Architectural Coatings July 13, 1988 January 6, 1992, 57 FR 354 Submitted on January 4, 1990.
Rule 336 Surface Coating Operations and Industrial Adhesive Application Processes September 1, 2021 January 16, 2025
90 FR 4652		 Submitted electronically on September 17, 2021, as an attachment to a letter dated September 17, 2021. The September 1, 2021 version of Rule 336 replaces the November 2, 2016 version that was conditionally approved on January 7, 2021.
Rule 337 Graphic Arts August 17, 2011 August 27, 2019
84 FR 44701		 Submitted on January 15, 2014.
Rule 338 Semiconductor Manufacturing June 19, 1996 February 9, 1998
63 FR 6489		 Submitted on February 26, 1997.
Rule 341 Metal Casting August 5, 1994 February 12, 1996
61 FR 5287		 Submitted on August 16, 1994.
Rule 342 Coating Wood Furniture and Fixtures November 2, 2016 August 27, 2019
84 FR 44701		 Submitted on June 22, 2017.
Rule 343 Commercial Bread Bakeries February 15, 1995 March 17, 1997
62 FR 12544		 Submitted on August 31, 1995.
Rule 344 Automobile Windshield Washer Fluid April 7, 1999 November 30, 2001
66 FR 59699		 Submitted on August 4, 1999.
Rule 346 Coating Wood Millwork November 20, 1996 February 9, 1998
63 FR 6489		 Submitted on March 4, 1997.
Rule 347 Ferrous Sand Casting March 4, 1998 June 12, 2000
65 FR 36788		 Submitted on August 4, 1999.
Rule 348 Aerospace Manufacturing and Rework Operations April 7, 1999 September 20, 1999
64 FR 50759		 Submitted on August 4, 1999.
Rule 349 Pharmaceutical, Cosmetic, and Vitamin Manufacturing Operations April 7, 1999 June 8, 2001
66 FR 30815		 Submitted on August 4, 1999.
Rule 350 Storage and Transfer of Organic Liquids (Non-Gasoline) at an Organic Liquid Distribution (OLD) Facility November 18, 2020 December 9, 2024
89 FR 97543		 Submitted electronically on December 3, 2020, as an attachment to a letter dated November 24, 2020.
Rule 351 Storage and Loading of Gasoline at Bulk Gasoline Plants and at Bulk Gasoline Terminals November 18, 2020 December 9, 2024
89 FR 97543		 Submitted electronically on December 3, 2020, as an attachment to a letter dated November 24, 2020.
Rule 352 Gasoline Cargo Tank Testing and Use November 18, 2020 January 10, 2025
90 FR 1903		 Submitted electronically on December 3, 2020, as an attachment to a letter dated November 24, 2020.
Rule 353 Storage and Loading at Gasoline Dispensing Facilities November 18, 2020 January 10, 2025
90 FR 1903

Submitted electronically on December 3, 2020, as an attachment to a letter dated November 24, 2020.
Rule 358 Polystyrene Foam Operations April 20, 2005 May 26, 2005
70 FR 30370		 Submitted on April 25, 2005.

Regulation V - Air Quality Standards and Area Classification

County Citation Title/Subject State Effective Date EPA Approval Date Additional Explanation
Rule 510 Air Quality Standards December 11, 2019 10/4/2021
86 FR 54628		 The December 11, 2019 version of Rule
510 replaces the version that was
adopted on November 1, 2006 (74 FR
57612).

Regulation VI - Emergency Episodes

County Citation Title/Subject State Effective Date EPA Approval Date Additional Explanation
Rule 600 Emergency Episodes July 13, 1988 March 18, 1999
64 FR 13351		 Submitted on January 4, 1990.

Appendices to Maricopa County Air Pollution Control Rules and Regulations

County Citation Title/Subject State Effective Date EPA Approval Date Additional Explanation
Appendix C Fugitive Dust Test Methods March 26, 2008 December 15, 2010
75 FR 78167		 Cited in Rules 310 and 310.01. Submitted on July 10, 2008.
Appendix F Soil Designations April 7, 2004 August 21, 2007
72 FR 46564		 Cited in Rule 310. Submitted on October 7, 2005.

EPA-Approved Maricopa County Documents Related to Applications for Dust Control Permits

Title State Effective Date EPA Approval Date Additional Explanation
Application for Dust Control Permit (pdf) June 22, 2005 August 21, 2007, 72 FR 46564 Relates to Rule 310 (“Fugitive Dust from Dust-Generating Operations”). Element of the Revised PM-10 State Implementation Plan for the Salt River Area, Additional Materials, September 2005. Submitted on November 29, 2005.
Guidance for Application for Dust Control Permit (pdf) June 22, 2005 August 21, 2007, 72 FR 46564 Relates to Rule 310 (“Fugitive Dust from Dust-Generating Operations”). Element of the Revised PM-10 State Implementation Plan for the Salt River Area, Additional Materials, September 2005. Submitted on November 29, 2005.

EPA-Approved Ordinances Adopted by Maricopa County and Other Local Jurisdictions Within Maricopa County

County Citation Title/Subject State Effective Date EPA Approval Date Additional Explanation
Maricopa County Ordinance P-26 (pdf) Residential Woodburning Restriction Ordinance October 23, 2019 April 14, 2022, 87-FR-22135 Submitted November 20, 2019
Maricopa County Ordinance P-7 (pdf) Trip Reduction Ordinance May 26, 1994 May 4, 1998, 63 FR 24434 Submitted on August 31, 1995.
Town of Carefree Ordinance No. 98-14 (pdf) An Ordinance of the Town of Carefree, Maricopa County, Arizona, Adding Section 10-4 to the Town Code Relating to Clean-Burning Fireplaces, Providing Penalties for Violations (3 pages) September 1, 1998 July 25, 2002, 67 FR 48718 Submitted on February 16, 2000.
Town of Gilbert Ordinance 1066 (pdf) An Ordinance of the Common Council of the Town of Gilbert, Arizona Amending the Code of Gilbert by Amending Chapter 30 Environment, by adding New Article II Fireplace Restrictions Prescribing Standards for Fireplaces, Woodstoves, and Other Solid-Fuel Burning Devices in New Construction; Providing for an Effective Date of January 1, 1999; Providing for Repeal of Conflicting Ordinances; Providing for Severability (3 pages) January 1, 1999 July 25, 2002, 67 FR 48718 Adopted by the Town of Gilbert on November 25, 1997. Submitted on February 16, 2000.
City of Mesa Ordinance No. 3434 (pdf) An Ordinance of the City Council of the City of Mesa, Maricopa County, Arizona, Relating to Fireplace Restrictions Amending Title 4, Chapter 1, Section 2 Establishing a Delayed Effective Date; and Providing Penalties for Violations (3 pages) December 31, 1998 July 25, 2002, 67 FR 48718 Adopted by the City of Mesa on February 2, 1998. Submitted on February 16, 2000.
Town of Paradise Valley Ordinance Number 450 (pdf) An Ordinance of the Town of Paradise Valley, Arizona, Adding Section 5-1-7 to the Town Code Relating to Clean-Burning Fireplaces, Providing Penalties for Violations (3 pages) December 18, 1997 July 25, 2002, 67 FR 48718 Adopted by the Town of Paradise Valley on December 18, 1997. Submitted on February 16, 2000.
Town of Paradise Valley Ordinance Number 454 (pdf) An Ordinance of the Town of Paradise Valley, Arizona, Relating to Grading and Dust Control, Amending Article 5-13 of the Town Code and Sections 5-13-1 Through 5-13-5, Providing Penalties for Violations and Severability (6 pages) January 22, 1998 July 25, 2002, 67 FR 48718 Adopted by the Town of Paradise Valley on January 22, 1998. Submitted on February 16, 2000. [Incorporation Note: There is an error in the ordinance's title, ordinance amended only sections 5-13-1 to 5-13-4; see section 1 of the ordinance.]
City of Phoenix Ordinance No. G4062 (pdf) An Ordinance Amending the Phoenix City Code By Adding A New Chapter 40 “Environmental Protections,” By Regulating Fireplaces, Wood Stoves and Other Solid-Fuel Burning Devices and Providing that the Provisions of this Ordinance Shall Take Effect on December 31, 1998 (5 pages) December 31, 1998 July 25, 2002, 67 FR 48718 Adopted by the City of Phoenix on December 10, 1997. Submitted on February 16, 2000.
City of Phoenix Ordinance No. G4037 (pdf) An Ordinance Amending Chapter 39, Article 2, Section 39-7 of the Phoenix City Code by Adding Subsection G Relating to Dust Free Parking Areas; and Amending Chapter 36, Article XI, Division I, Section 36-145 of the Phoenix City Code Relating to Parking on Non-Dust Free Lots (5 pages) July 2, 1997 July 25, 2002, 67 FR 48718 Adopted by the City of Phoenix on July 2, 1997. Submitted on February 16, 2000.
City of Tolleson Ordinance No. 376, N.S. (pdf) An Ordinance of the City of Tolleson, Maricopa County, Arizona, Amending Chapter 7 of the Tolleson City Code by Adding a New Section 7-9, Prohibiting the Installation or Construction of a Fireplace or Wood Stove Unless It Meets the Standards Set Forth Herein (including Exhibit A, 4 pages) December 8, 1998 July 25, 2002, 67 FR 48718 Adopted by the City of Tolleson on December 8, 1998. Submitted on February 16, 2000.

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Last updated on May 15, 2025