Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

    • Environmental Topics
    • Air
    • Bed Bugs
    • Chemicals, Toxics, and Pesticide
    • Emergency Response
    • Environmental Information by Location
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Radon
    • Research
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Guidance
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • Our Mission and What We Do
    • Headquarters Offices
    • Regional Offices
    • Labs and Research Centers
    • Newsroom
    • Planning, Budget, and Results
    • Organization Chart
    • EPA History

Breadcrumb

  1. Home
  2. Air Quality Implementation Plans

Iowa SIP: Chapter 21 - Compliance, Excess Emissions, and Measurement of Emissions

Chapter 21 - Compliance, Excess Emissions, and Measurement of Emissions

  Approved Pursuant to
RuleTitleSIP111(d)112(l)Title V
21.1Definitions and Compliance RequirementsX   
21.2VariancesX   
21.4Circumvention of RulesX   
21.5Evidence Used in Establishing that a Violation has Occurred or is OccurringX   
21.6Temporary Electricity Generation for Disaster SituationsX   
21.7Excess Emission ReportingX   
21.8Maintenance and Repair RequirementsX   
21.10Testing and Sampling of New and Existing EquipmentX   
21.13Methodology and Qualified ObserverX   
21.14Prevention of Air Pollution Emergency Episodes - GeneralX   
21.15Episode CriteriaX   
21.16Preplanned Abatement StrategiesX   
21.17Actions Taken During EpisodesX   

  • 567-21.1(455B) Definitions and compliance requirements. (pdf) (176.49 KB)
  • 567-21.2(455B) Variances (pdf) (132.94 KB)
  • 567-21.4(455B) Circumvention of rules. (pdf) (104.76 KB)
  • 567—21.5(455B) Evidence used in establishing that a violation has occurred or is occurring (pdf) (138.86 KB)
  • 567—21.6(455B) Temporary electricity generation for disaster situations (pdf) (102.83 KB)
  • 567-21.7(455B) Excess emission reporting (pdf) (129.95 KB)
  • 567—21.8(455B) Maintenance and repair requirements (pdf) (120.98 KB)
  • 567—21.10(455B) Testing and sampling of new and existing equipment (pdf) (141.78 KB)
  • 567—21.13(455B) Methodology and qualified observer (pdf) (102.92 KB)
  • 567-21.14(455B) Prevention of air pollution emergency episodes—general. (pdf) (102.89 KB)
  • 567—21.15(455B) Episode criteria (pdf) (122.58 KB)
  • 567—21.16(455B) Preplanned abatement strategies (pdf) (124.82 KB)
  • 567—21.17(455B) Actions taken during episodes (pdf) (132.13 KB)

Air Quality Implementation Plans

  • About Air Quality Implementation Plans
  • Approved Air Quality Implementation Plans
  • Develop an Air Quality SIP
  • Find a Regional Contact for Air Quality SIPs/FIPS/TIPs
  • Tools for SIP Status
Contact Us about Air Quality Implementation Plans
Contact Us about Air Quality Implementation Plans to ask a question, provide feedback, or report a problem.
Last updated on October 7, 2026
  • Assistance
  • Spanish
  • Arabic
  • Chinese (simplified)
  • Chinese (traditional)
  • French
  • Haitian Creole
  • Korean
  • Portuguese
  • Russian
  • Tagalog
  • Vietnamese
United States Environmental Protection Agency

Discover.

  • Accessibility Statement
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshot
  • Grants
  • No FEAR Act Data
  • Plain Writing
  • Privacy and Security Notice

Connect.

  • Data
  • Inspector General
  • Jobs
  • Newsroom
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions
  • Site Feedback

Follow.