EPA-Approved North Coast Unified Air Quality Management District Regulations in the California SIP

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 document and tables contain the EPA approved rules and regulations for the North Coast Unified Air Quality Management District (AQMD) portion of the California State Implementation Plan (SIP). EPA's Pacific Southwest Office maintains these tables and will update them to reflect any changes in the official tables codified in the Code of Federal Regulations. To find the status of SIP submittals, visit SIP Status Reports.

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Compiled Rules and Regulations

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EPA-Approved North Coast Unified Air District Regulations

Del Norte County Air District Regulations; Humboldt County Air District Regulations; Trinity County Air District Regulations

Original Codification of Rules and Regulations (District-Wide Applicability)

Regulation 1 (Air Quality Control Rules), Chapter II – Permits
District CitationTitle/SubjectState Effective DateEPA Approval DateAdditional Explanation
200(a), (b), (c)(1)- (2), and (d)Permit RequirementsOctober 12, 1983July 31, 1985, 50 FR 30941Submitted on March 14, 1984. See 40 CFR 52.220(c)(153)(ii)(B).
200(c)(3)-(6)Permit RequirementsMarch 14, 1984July 31, 1985, 50 FR 30941Submitted on July 10, 1984. See 40 CFR 52.220(c)(155)(v)(B).
220(a) and (b)New Source Review Standards (Including PSD Evaluations)March 14, 1984July 31, 1985, 50 FR 30941Paragraphs (a) and (b) are entitled "Emission Analysis," and "New Source Review Procedure," respectively. Submitted on July 10, 1984. See 40 CFR 52.220(c)(155)(v)(B).
220(c)New Source Review Standards (Including PSD Evaluations)October 12, 1983July 31, 1985, 50 FR 30941Paragraph (c) is titled "Power Plant Review Procedures." Submitted on March 14, 1984. See 40 CFR 52.220(c)(153)(ii)(B).
240Permit to OperateOctober 12, 1983December 5, 1984, 49 FR 47490The introductory paragraph of paragraph (e) was superseded by approval of a revised paragraph at 50 FR 19529 (May 9, 1985). Submitted on March 14, 1984. See 40 CFR 52.220(c)(153)(ii)(A).
240(e)Permit to OperateAugust 10, 1984May 9, 1985, 50 FR 19529Only the introductory paragraph of paragraph (e) was submitted and approved. Submitted on October 19, 1984. See 40 CFR 52.220(c)(156)(iii)(B).
260ExclusionsOctober 12, 1983July 31, 1985, 50 FR 30941Submitted on March 14, 1984. See 40 CFR 52.220(c)(153)(ii)(B).

Recodification of Rules and Regulations (District-Wide Applicability)

Regulation I – General Provisions, Permits and Prohibitions
District CitationTitle/SubjectState Effective DateEPA Approval DateAdditional Explanation
100General ProvisionsMay 19, 2005May 6, 2009, 74 FR 20874Submitted on July 18, 2008. See 40 CFR 52.220(c)(359)(i)(A)(3).
101DefinitionsMay 15, 2008May 6, 2009, 74 FR 20874Submitted on July 18, 2008. See 40 CFR 52.220(c)(359)(i)(A)(4).
104.2Visible EmissionsMay 19, 2005May 6, 2009, 74 FR 20877Submitted on July 18, 2008. See 40 CFR 52.220(c)(359)(i)(A)(1).
104.3Particulate MatterMay 19, 2005May 6, 2009, 74 FR 20877Submitted on July 18, 2008. See 40 CFR 52.220(c)(359)(i)(A)(1).
104.4Fugitive Dust EmissionsMay 19, 2005May 6, 2009, 74 FR 20877Submitted on July 18, 2008. See 40 CFR 52.220(c)(359)(i)(A)(1).
104.10Petroleum Loading and StorageMay 19, 2005May 6, 2009, 74 FR 20877Submitted on July 18, 2008. See 40 CFR 52.220(c)(359)(i)(A)(1).
108Severability of Rules and RegulationsMay 19, 2005May 6, 2009, 74 FR 20874Submitted on July 18, 2008. See 40 CFR 52.220(c)(359)(i)(A)(5).
Regulation II – Open Burning
District CitationTitle/SubjectState Effective DateEPA Approval DateAdditional Explanation
200Effective Date and DefinitionsMay 15, 2008May 6, 2009, 74 FR 20877Submitted on July 18, 2008. See 40 CFR 52.220(c)(359)(i)(A)(2).
201General Prohibitions and Exemptions for Selected Open BurningMay 17, 2007May 6, 2009, 74 FR 20877Submitted on July 18, 2008. See 40 CFR 52.220(c)(359)(i)(A)(2).
202Burn Hours and Notice of IgnitionMay 15, 2008May 6, 2009, 74 FR 20877Submitted on July 18, 2008. See 40 CFR 52.220(c)(359)(i)(A)(2).
203General Burn Practices, Requirements, and ConditionsMay 15, 2008May 6, 2009, 74 FR 20877Submitted on July 18, 2008. See 40 CFR 52.220(c)(359)(i)(A)(2).
204Ignition Devices and MethodsMay 15, 2008May 6, 2009, 74 FR 20877Submitted on July 18, 2008. See 40 CFR 52.220(c)(359)(i)(A)(2).
205Certificates from Department of Fish and GameJuly 18, 2003May 6, 2009, 74 FR 20877Submitted on July 18, 2008. See 40 CFR 52.220(c)(359)(i)(A)(2).
206Burning at Disposal SitesDecember 16, 2004May 6, 2009, 74 FR 20877Submitted on July 18, 2008. See 40 CFR 52.220(c)(359)(i)(A)(2).
207Wildland Vegetation Management BurningMay 15, 2008May 6, 2009, 74 FR 20877Submitted on July 18, 2008. See 40 CFR 52.220(c)(359)(i)(A)(2).
208Burn Registration ProgramDecember 16, 2004May 6, 2009, 74 FR 20877Submitted on July 18, 2008. See 40 CFR 52.220(c)(359)(i)(A)(2).
Appendices to North Coast Unified AQMD Rules and Regulations
District CitationTitle/SubjectState Effective DateEPA Approval DateAdditional Explanation
AHumboldt Bay Air BasinMarch 14, 1984January 29, 1985, 50 FR 3906Submitted on July 10, 1984. See 40 CFR 52.220(c)(155)(v)(A).
B (excluding paragraph (D)(1)(e))Continuous MonitoringOctober 12, 1983December 5, 1984, 49 FR 47490Paragraph (d)(1)(e) refers to monitoring systems for kraft pulp mills. Submitted on March 14, 1984. See 40 CFR 52.220(c)(153)(ii)(A).

Original Codification of Rules and Regulations (Del Norte County portion of the District)

District CitationTitle/SubjectState Effective DateEPA Approval DateAdditional Explanation
22(a)Action on ApplicationsSeptember 27, 1971May 31, 1972, 37 FR 10842Paragraph (a) is titled "Approval." The rest of Rule 22 has been superseded. Submitted on February 21, 1972. See 40 CFR 52.220(b).
23AppealsSeptember 27, 1971May 31, 1972, 37 FR 10842Submitted on February 21, 1972. See 40 CFR 52.220(b).

Recodification of Rules and Regulations (Del Norte County portion of the District)

Chapter II – Permits
District CitationTitle/SubjectState Effective DateEPA Approval DateAdditional Explanation
230Action on ApplicationsDecember 14, 1981July 31, 1985, 50 FR 30941Submitted on August 6, 1982. See 40 CFR 52.220(c)(124)(vi)(B).
Chapter IV – Prohibitions
District CitationTitle/SubjectState Effective DateEPA Approval DateAdditional Explanation
400(b)General LimitationsAugust 9, 1976June 14, 1978, 43 FR 25677Paragraph (b) is titled "Circumvention." Submitted on November 10, 1976. See 40 CFR 52.220(c)(35)(ix)(C).
440Sulfur Oxide EmissionsAugust 9, 1976June 14, 1978, 43 FR 25677Submitted on November 10, 1976. See 40 CFR 52.220(c)(35)(ix)(C).
455(a) and (d)Geothermal Emission StandardsJuly 25, 1977November 7, 1978, 43 FR 51767Paragraph (a) establishes an SO2 concentration limit, and paragraph (d) is titled "Compliance Verification." Submitted on November 4, 1977. See 40 CFR 52.220(c)(42)(xv)(A).
470Reduction of Animal MatterAugust 9, 1976June 14, 1978, 43 FR 25677Submitted on November 10, 1976. See 40 CFR 52.220(c)(35)(ix)(C).
480Orchard, Vineyard, and Citrus Grove HeatersAugust 9, 1976June 14, 1978, 43 FR 25677Submitted on November 10, 1976. See 40 CFR 52.220(c)(35)(ix)(C).
Chapter V – Enforcement and Penalty Actions
District CitationTitle/SubjectState Effective DateEPA Approval DateAdditional Explanation
510Orders for AbatementAugust 9, 1976June 14, 1978, 43 FR 25677Submitted on November 10, 1976. See 40 CFR 52.220(c)(35)(ix)(C).
540Equipment BreakdownFebruary 26, 1979October 31, 1980, 45 FR 72147Submitted on May 23, 1979. See 40 CFR 52.220(c)(51)(iii)(A).

Original Codification of Rules and Regulations (Humboldt County portion of the District)

District CitationTitle/SubjectState Effective DateEPA Approval DateAdditional Explanation
2DefinitionsSeptember 22, 1970May 31, 1972, 37 FR 10842All the definitions have been superseded or otherwise are no longer relied upon except for "non-condensibles," which is relied upon by SIP Rule 57 (Sulfide Emission Standard). Submitted on February 21, 1972. See 40 CFR 52.220(b).
10(e)Permits RequiredSeptember 22, 1970May 31, 1972, 37 FR 10842Paragraph (e) is titled "Alteration of Permit." The rest of Rule 10 has been superseded. Submitted on February 21, 1972. See 40 CFR 52.220(b).
54Incinerator BurningSeptember 22, 1970May 31, 1972, 37 FR 10842Submitted on February 21, 1972. See 40 CFR 52.220(b).
57Sulfide Emission StandardMay 2, 1972September 22, 1972, 37 FR 19812Submitted on June 30, 1972. See 40 CFR 52.220(c)(6).

Re-codification of Rules and Regulations (Humboldt County portion of the District)

Chapter II – Permits
District CitationTitle/SubjectState Effective DateEPA Approval DateAdditional Explanation
210Environmental AssessmentSeptember 30, 1980June 18, 1982, 47 FR 26379Submitted on March 23, 1981. See 40 CFR 52.220(c)(95)(vi)(A).
230Action on ApplicationsDecember 8, 1981July 31, 1985, 50 FR 30941Submitted on August 6, 1982. See 40 CFR 52.220(c)(124)(vii)(B).
Chapter IV – Prohibitions
District CitationTitle/SubjectState Effective DateEPA Approval DateAdditional Explanation
400(b)General LimitationsJuly 13, 1976August 2, 1978, 43 FR 33912Paragraph (b) is titled "Circumvention." Submitted on November 10, 1976. See 40 CFR 52.220(c)(35)(xiv)(C).
440Sulfur Oxide EmissionsJuly 13, 1976August 2, 1978, 43 FR 33912Submitted on November 10, 1976. See 40 CFR 52.220(c)(35)(xiv)(C).
455(a) and (d)Geothermal Emission StandardsJune 28, 1977December 19, 1978, 43 FR 59063Paragraph (a) establishes an SO2 concentration limit, and paragraph (d) is titled "Compliance Verification." Submitted on November 4, 1977. See 40 CFR 52.220(c)(42)(xvii)(A).
470Reduction of Animal MatterJuly 13, 1976August 2, 1978, 43 FR 33912Submitted on November 10, 1976. See 40 CFR 52.220(c)(35)(xiv)(C).
480Orchard, Vineyard, and Citrus Grove HeatersJuly 13, 1976August 2, 1978, 43 FR 33912Submitted on November 10, 1976. See 40 CFR 52.220(c)(35)(xiv)(C).
Chapter V – Enforcement and Penalty Actions
District CitationTitle/SubjectState Effective DateEPA Approval DateAdditional Explanation
540Equipment BreakdownDecember 19, 1978October 31, 1980, 45 FR 72147Submitted on May 23, 1979. See 40 CFR 52.220(c)(51)(iv)(A).

Original Codification of Rules and Regulations (Trinity County portion of the District)

District CitationTitle/SubjectState Effective DateEPA Approval DateAdditional Explanation
14Alteration of PermitMay 5, 1972September 22, 1972, 37 FR 19812Submitted on June 30, 1972. See 40 CFR 52.220(c)(6).
20ApprovalMay 5, 1972September 22, 1972, 37 FR 19812Submitted on June 30, 1972. See 40 CFR 52.220(c)(6).
25AppealsMay 5, 1972September 22, 1972, 37 FR 19812Submitted on June 30, 1972. See 40 CFR 52.220(c)(6).

Re-codification of Rules and Regulations (Trinity County portion of the District)

Chapter II – Permits
District CitationTitle/SubjectState Effective DateEPA Approval DateAdditional Explanation
230Action on ApplicationsDecember 7, 1981July 31, 1985, 50 FR 30941Submitted on August 6, 1982. See 40 CFR 52.220(c)(124)(x)(B).
Chapter IV – Prohibitions
District CitationTitle/SubjectState Effective DateEPA Approval DateAdditional Explanation
400(b)General LimitationsJuly 12, 1976August 18, 1978, 43 FR 36625Paragraph (b) is titled "Circumvention." Submitted on November 10, 1976. See 40 CFR 52.220(c)(35)(xvii)(C).
440Sulfur Oxide EmissionsJuly 12, 1976August 18, 1978, 43 FR 36625Submitted on November 10, 1976. See 40 CFR 52.220(c)(35)(xvii)(C).
455(a) and (d)Geothermal Emission StandardsJune 27, 1977December 21, 1978, 43 FR 59491Paragraph (a) establishes an SO2 concentration limit, and paragraph (d) is titled "Compliance Verification." Submitted on November 4, 1977. See 40 CFR 52.220(c)(42)(xx)(A).
470Reduction of Animal MatterJuly 12, 1976August 18, 1978, 43 FR 36625Submitted on November 10, 1976. See 40 CFR 52.220(c)(35)(xvii)(C).
480Orchard, Vineyard, and Citrus Grove HeatersJuly 12, 1976August 18, 1978, 43 FR 36625Submitted on November 10, 1976. See 40 CFR 52.220(c)(35)(xvii)(C).
Chapter V – Enforcement and Penalty Actions
District CitationTitle/SubjectState Effective DateEPA Approval DateAdditional Explanation
540Equipment BreakdownJanuary 15, 1979October 31, 1980, 45 FR 72147Submitted on May 23, 1979. See 40 CFR 52.220(c)(51)(vi)(A).

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Last updated on March 11, 2026