Home/CFR/Title 40/Part 51
FEDERAL · 40 CFR

Part 51 — Requirements for Preparation, Adoption, and Submittal of Implementation Plans

203 sections · Title 40: Protection of Environment

§ 51.1Who is responsible for actions described in this subpart?
§ 51.5What tools are available to help prepare and report emissions data?
§ 51.10§ 51.10 [Reserved]
§ 51.15What data does my state need to report to EPA?
§ 51.20What are the emission thresholds that separate point and nonpoint sources?
§ 51.25What geographic area must my state's inventory cover?
§ 51.30When does my state report which emissions data to EPA?
§ 51.35How can my state equalize the emission inventory effort from year to year?
§ 51.40In what form and format should my state report the data to EPA?
§ 51.45Where should my state report the data?
§ 51.50What definitions apply to this subpart?
§ 51.100Definitions.
§ 51.101Stipulations.
§ 51.102Public hearings.
§ 51.103Submission of plans, preliminary review of plans.
§ 51.104Revisions.
§ 51.105Approval of plans.
§ 51.110Attainment and maintenance of national standards.
§ 51.111Description of control measures.
§ 51.112Demonstration of adequacy.
§ 51.113§ 51.113 [Reserved]
§ 51.114Emissions data and projections.
§ 51.115Air quality data and projections.
§ 51.116Data availability.
§ 51.117Additional provisions for lead.
§ 51.118Stack height provisions.
§ 51.119Intermittent control systems.
§ 51.120Requirements for State Implementation Plan revisions relating to new motor vehicles.
§ 51.121Findings and requirements for submission of State implementation plan revisions relating to emissions of nitrogen oxides.
§ 51.122Emissions reporting requirements for SIP revisions relating to budgets for NO<sub>X</sub> emissions.
§ 51.123Findings and requirements for submission of State implementation plan revisions relating to emissions of oxides of nitrogen pursuant to the Clean Air Interstate Rule.
§ 51.124Findings and requirements for submission of State implementation plan revisions relating to emissions of sulfur dioxide pursuant to the Clean Air Interstate Rule.
§ 51.125§ 51.125 [Reserved]
§ 51.126Determination of widespread use of ORVR and waiver of CAA section 182(b)(3) Stage II gasoline vapor recovery requirements.
§ 51.150Classification of regions for episode plans.
§ 51.151Significant harm levels.
§ 51.152Contingency plans.
§ 51.153Reevaluation of episode plans.
§ 51.160Legally enforceable procedures.
§ 51.161Public availability of information.
§ 51.162Identification of responsible agency.
§ 51.163Administrative procedures.
§ 51.164Stack height procedures.
§ 51.165Permit requirements.
§ 51.166Prevention of significant deterioration of air quality.
§ 51.190Ambient air quality monitoring requirements.
§ 51.210General.
§ 51.211Emission reports and recordkeeping.
§ 51.212Testing, inspection, enforcement, and complaints.
§ 51.213Transportation control measures.
§ 51.214Continuous emission monitoring.
§ 51.230Requirements for all plans.
§ 51.231Identification of legal authority.
§ 51.232Assignment of legal authority to local agencies.
§ 51.240General plan requirements.
§ 51.241Nonattainment areas for carbon monoxide and ozone.
§ 51.242§ 51.242 [Reserved]
§ 51.260Legally enforceable compliance schedules.
§ 51.261Final compliance schedules.
§ 51.262Extension beyond one year.
§ 51.280Resources.
§ 51.281Copies of rules and regulations.
§ 51.285Public notification.
§ 51.286Electronic reporting.
§ 51.300Purpose and applicability.
§ 51.301Definitions.
§ 51.302Reasonably attributable visibility impairment.
§ 51.303Exemptions from control.
§ 51.304Identification of integral vistas.
§ 51.305Monitoring for reasonably attributable visibility impairment.
§ 51.306§ 51.306 [Reserved]
§ 51.307New source review.
§ 51.308Regional haze program requirements.
§ 51.309Requirements related to the Grand Canyon Visibility Transport Commission.
§ 51.320Annual air quality data report.
§ 51.321Annual source emissions and State action report.
§ 51.322Sources subject to emissions reporting.
§ 51.323Reportable emissions data and information.
§ 51.324Progress in plan enforcement.
§ 51.326Reportable revisions.
§ 51.327Enforcement orders and other State actions.
§ 51.328§ 51.328 [Reserved]
§ 51.341Request for 18-month extension.
§ 51.350Applicability.
§ 51.351Enhanced I/M performance standard.
§ 51.352Basic I/M performance standard.
§ 51.353Network type and program evaluation.
§ 51.354Adequate tools and resources.
§ 51.355Test frequency and convenience.
§ 51.356Vehicle coverage.
§ 51.357Test procedures and standards.
§ 51.358Test equipment.
§ 51.359Quality control.
§ 51.360Waivers and compliance via diagnostic inspection.
§ 51.361Motorist compliance enforcement.
§ 51.362Motorist compliance enforcement program oversight.
§ 51.363Quality assurance.
§ 51.364Enforcement against contractors, stations and inspectors.
§ 51.365Data collection.
§ 51.366Data analysis and reporting.
§ 51.367Inspector training and licensing or certification.
§ 51.368Public information and consumer protection.
§ 51.369Improving repair effectiveness.
§ 51.370Compliance with recall notices.
§ 51.371On-road testing.
§ 51.372State Implementation Plan submissions.
§ 51.373Implementation deadlines.
§ 51.390Implementation plan revision.
§ 51.490Applicability.
§ 51.491Definitions.
§ 51.492State program election and submittal.
§ 51.493State program requirements.
§ 51.494Use of program revenues.
§ 51.850§ 51.850 [Reserved]
§ 51.851State implementation plan (SIP) or Tribal implementation plan (TIP) revision.
§ 51.852-51.860§§ 51.852-51.860 [Reserved]
§ 51.900Definitions.
§ 51.901Applicability of part 51.
§ 51.902Which classification and nonattainment area planning provisions of the CAA shall apply to areas designated nonattainment for the 1997 8-hour NAAQS?
§ 51.903How do the classification and attainment date provisions in section 181 of subpart 2 of the CAA apply to areas subject to § 51.902(a)?
§ 51.904How do the classification and attainment date provisions in section 172(a) of subpart 1 of the CAA apply to areas subject to § 51.902(b)?
§ 51.905How do areas transition from the 1-hour NAAQS to the 1997 8-hour NAAQS and what are the anti-backsliding provisions?
§ 51.906Redesignation to nonattainment following initial designations for the 8-hour NAAQS.
§ 51.907For an area that fails to attain the 8-hour NAAQS by its attainment date, how does EPA interpret sections 172(a)(2)(C)(ii) and 181(a)(5)(B) of the CAA?
§ 51.908What modeling and attainment demonstration requirements apply for purposes of the 8-hour ozone NAAQS?
§ 51.909§ 51.909 [Reserved]
§ 51.910What requirements for reasonable further progress (RFP) under sections 172(c)(2) and 182 apply for areas designated nonattainment for the 8-hour ozone NAAQS?
§ 51.911§ 51.911 [Reserved]
§ 51.912What requirements apply for reasonably available control technology (RACT) and reasonably available control measures (RACM) under the 8-hour NAAQS?
§ 51.913How do the section 182(f) NO<sub>X</sub> exemption provisions apply for the 8-hour NAAQS?
§ 51.914What new source review requirements apply for 8-hour ozone nonattainment areas?
§ 51.915What emissions inventory requirements apply under the 8-hour NAAQS?
§ 51.916What are the requirements for an Ozone Transport Region under the 8-hour NAAQS?
§ 51.917What is the effective date of designation for the Las Vegas, NV, 8-hour ozone nonattainment area?
§ 51.918Can any SIP planning requirements be suspended in 8-hour ozone nonattainment areas that have air quality data that meets the NAAQS?
§ 51.919Applicability.
§ 51.930Mitigation of Exceptional Events.
§ 51.1000Definitions.
§ 51.1001Applicability of part 51.
§ 51.1002Classifications and reclassifications.
§ 51.1003Attainment plan due dates and submission requirements.
§ 51.1004Attainment dates.
§ 51.1005Attainment date extensions.
§ 51.1006Optional PM<sub>2.5</sub> precursor demonstrations
§ 51.1007§ 51.1007 [Reserved]
§ 51.1008Emissions inventory requirements.
§ 51.1009Moderate area attainment plan control strategy requirements.
§ 51.1010Serious area attainment plan control strategy requirements.
§ 51.1011Attainment demonstration and modeling requirements.
§ 51.1012Reasonable further progress (RFP) requirements.
§ 51.1013Quantitative milestone requirements.
§ 51.1014Contingency measure requirements.
§ 51.1015Clean data requirements.
§ 51.1016Continued applicability of the FIP and SIP requirements pertaining to interstate transport under CAA section 110(a)(2)(D)(i) and (ii) after revocation of the 1997 primary annual PM<sub>2.5</sub> NAAQS.
§ 51.1100Definitions.
§ 51.1101Applicability of part 51.
§ 51.1102Classification and nonattainment area planning provisions.
§ 51.1103Application of classification and attainment date provisions in CAA section 181 to areas subject to § 51.1102.
§ 51.1104§ 51.1104 [Reserved]
§ 51.1105Transition from the 1997 ozone NAAQS to the 2008 ozone NAAQS and anti-backsliding.
§ 51.1106Redesignation to nonattainment following initial designations.
§ 51.1107Determining eligibility for 1-year attainment date extensions for the 2008 ozone NAAQS under CAA section 181(a)(5).
§ 51.1108Modeling and attainment demonstration requirements.
§ 51.1109§ 51.1109 [Reserved]
§ 51.1110Requirements for reasonable further progress (RFP).
§ 51.1111§ 51.1111 [Reserved]
§ 51.1112Requirements for reasonably available control technology (RACT) and reasonably available control measures (RACM).
§ 51.1113Section 182(f) NO<sub>X</sub> exemption provisions.
§ 51.1114New source review requirements.
§ 51.1115Emissions inventory requirements.
§ 51.1116Requirements for an Ozone Transport Region.
§ 51.1117Fee programs for Severe and Extreme nonattainment areas that fail to attain.
§ 51.1118Suspension of SIP planning requirements in nonattainment areas that have air quality data that meet an ozone NAAQS.
§ 51.1119Applicability.
§ 51.1200Definitions.
§ 51.1201Purpose.
§ 51.1202Applicability.
§ 51.1203Air agency requirements.
§ 51.1204Enforceable emission limits providing for attainment.
§ 51.1205Ongoing data requirements.
§ 51.1300Definitions.
§ 51.1301Applicability of this part.
§ 51.1302Classification and nonattainment area planning provisions.
§ 51.1303Application of classification and attainment date provisions in CAA section 181 to areas subject to § 51.1302.
§ 51.1304-51.1305§§ 51.1304-51.1305 [Reserved]
§ 51.1306Redesignation to nonattainment following initial designations.
§ 51.1307Determining eligibility for 1-year attainment date extensions for an 8-hour ozone NAAQS under CAA section 181(a)(5).
§ 51.1308Modeling and attainment demonstration requirements.
§ 51.1309§ 51.1309 [Reserved]
§ 51.1310Requirements for reasonable further progress (RFP).
§ 51.1311§ 51.1311 [Reserved]
§ 51.1312Requirements for reasonably available control technology (RACT) and reasonably available control measures (RACM).
§ 51.1313Section 182(f) NO<sub>X</sub> exemption provisions.
§ 51.1314New source review requirements.
§ 51.1315Emissions inventory requirements.
§ 51.1316Requirements for an Ozone Transport Region.
§ 51.1317Fee programs for Severe and Extreme nonattainment areas that fail to attain.
§ 51.1318Suspension of SIP planning requirements in nonattainment areas that have air quality data that meet an ozone NAAQS.
§ 51.1319§ 51.1319 [Reserved]
§ 51.1400Definitions.
§ 51.1401Applicability of part 51.
§ 51.1402SIP submission and control measure implementation deadlines for reclassified ozone nonattainment areas.
§ 51.1403Applicability of ozone SIP requirements for former classification after reclassification.