Primary tabs

The Air Pollution Control District protects air quality in Louisville Metro to ensure healthy air for breathing, economic security, and prosperity for our citizens and future generations.

The APCD implements the Federal Clean Air Act in Louisville and works in partnership with the U. S. Environmental Protection Agency, the Kentucky Division for Air Quality, and the Indiana Department of Environmental Management. Furthermore, the APCD has worked to make Louisville's air cleaner for more than half a century. The APCD is part of Louisville Forward.

Data Extent


Other (Public Domain)

Other Access

The information on this page (the dataset metadata) is also available in these formats.


via the DKAN API

APCD Industrial Operating Permits

Louisville Metro Air Pollution Control District (APCD) industrial permits are applications for a permit to operate equipment that emits or controls the emission of air pollutants.

Permits ensure that emissions meet the needs of Louisville/Jefferson County to achieve and maintain federal air quality standards.

Any piece of equipment or project that emits or controls air pollutants requires a permit prior to installation and operation unless it is specifically exempted from the APCD’s permit requirements. Companies apply for and receive a permit before purchasing new equipment to know exactly what the permit conditions and other requirements will be before construction, installation, and operation begin. Industrial Operating permits are issued after a project demonstrates that compliance is achievable.

The Industrial Permits includes multiple types of emission based permits: Title V Permit, Federally Enforceable District-Origin Operating Permit (FEDOOP), Minor Source Permit, plus registrations (Registered Sources). FEDOOP permits are further divided into STAR-applicable and STAR-exempt. (See below.) A source may also be identified as exempt from APCD permitting.

Title V
Title V refers to a section of the Clean Air Act (CAA) that addresses the largest sources of air pollution. Title V permits combine all the applicable federal, state, and local air requirements at a Title V facility into one permit.

The Title V permit application process is detailed and complex and may require professional assistance. An opportunity for public comment and an opportunity for a public hearing are required. There is also a requirement that EPA and affected states are provided an opportunity to review proposed permits. EPA has the authority to object to permit issuance.

Title V operating permits are issued for a period of 5 years. A complete Title V permit renewal application must be submitted to the APCD between 18 months and 6 months prior to the end of the permit term for continued operation.

FEDOOPs, as described in APCD Regulation 2.17, are issued to major sources willing to accept federally enforceable emissions limitations below those that require a Title V permit. FEDOOP sources that emit more than certain amounts of specific toxic air pollutants are subject to APCD’s Strategic Toxic Air Reductions (STAR) Program.

FEDOOPs are issued for a period of 5 years. A complete FEDOOP renewal application must be submitted to the APCD between 12 months and 90 days prior to the end of the permit term for continued operation. FEDOOPs are what the US EPA refers to as synthetic minor permits.

Minor Source
The majority of stationary air pollution sources in Louisville do not emit at the same levels as Title V sources or FEDOOP sources. If a company is unsure of its emissions levels, it is likely a minor source. However, companies are encouraged to contact the APCD with any questions about the process.

Minor sources have a combined permit to construct and operate. No application is necessary to convert a construction permit into an operating permit. Minor source operating/construction permits do not have an expiration date. There is no formal renewal application for minor sources.

Registered Source

Stationary air pollution sources with very low emissions or that are not capable of exceeding a performance standard can be registered. These facility sites receive a registration letter rather than a permit, but pay an annual fee and are subject to compliance monitoring.


Exempt stationary sources do not need a permit or registration and do not pay any fees to APCD, unless the Risk Management Program under Section 112(r) of the Clean Air Act is applicable.

Release Date
Spatial / Geographical Coverage Area
GEOMETRYCOLLECTION (POLYGON ((-85.585272053326 38.33943050674, -85.574725927596 38.333976819898, -85.561321517196 38.337124469417, -85.468205755185 38.28530907192, -85.404898970052 38.263729926094, -85.428829650836 38.118382676965, -85.479900537052 38.100127882032, -85.515669399683 38.088845798814, -85.557270194917 38.073840699338, -85.71257768941 38.087310672264, -85.874917060567 38.042497548191, -85.912789398268 38.020652085019, -85.91386635713 38.010842939494, -85.922968705068 38.008358251243, -85.934393316832 37.997210210835, -85.94504404219 38.002426170817, -85.923653751423 38.024856022327, -85.91897861252 38.040699089862, -85.916159645592 38.063634969105, -85.905038686638 38.089995706638, -85.904471614416 38.107042807849, -85.909096035422 38.142341491042, -85.906941832342 38.165516883622, -85.896049899443 38.185450668789, -85.874988049355 38.207697317443, -85.851673772408 38.22260745727, -85.838862598006 38.240536226458, -85.836049514108 38.26545659857, -85.829065053335 38.276554348977, -85.81454621842 38.283009847759, -85.788057847574 38.28835803304, -85.773074406773 38.285761074007, -85.760921709 38.271913901067, -85.741595182199 38.26766834773, -85.679961675582 38.297584551846, -85.654373194331 38.325351972185, -85.63863429852 38.363857374588, -85.63781706754 38.380239112642, -85.569412789133 38.341751850938, -85.585272053326 38.33943050674)))
English (United States)
Other (Public Domain)
Louisville Metro Air Pollution Control District
Data Dictionary

Here is information about each column. The column name is in bold, followed by a description of the column, then the column data type in italics, then the domain or range of values.

  1. Permit Number: This is the permit number within the data system. For APCD industrial operating permits, it is "O-" followed by a number formatted as four digits. This number is also known as the plant ID. Text, 6 characters: "O-0001" through "O-9999"
  2. Effective Date: The date the permit or the most recent renewal became effective. Date: Dates between 2000-01-01 (1/1/2000) and a month in the future. May be blank if the permit has not yet been issued.
  3. Expiration Date: The date the permit or the most recent renewal expires/expired. Date: Blank for Minor Source permits, registered sources, and exempt sources. For Title V permits and FEDOOP permits: Dates between 2005-01-01 (1/1/2005) and up to 5 years and one month in the future. May be blank if the permit has not yet been issued.
  4. Permit Type: The general type of permit: APCD industrial operating permit. Text, 21 characters: "APCD Operating Permit"
  5. Applicant: The name of the responsible party for the permit. This is normally the company that operates the plant. Text, up to 50 characters: Names of organizations. Should not be blank
  6. Street Address: The street address of the facility site (plant). Text, up to 75 characters: Official valid addresses in Louisville/Jefferson County, Kentucky
  7. City: The city of the street address. Text, up to 30 characters: "LOUISVILLE" or a smaller city in Jefferson County, Kentucky
  8. State: The state of the street address: always Kentucky. Text, 2 characters: "KY"
  9. ZIP Code: The 5-digit ZIP code of the street address. Text, 5 characters: Valid 5-digit ZIP codes in Louisville/Jefferson County, Kentucky
  10. Permit Subtype: A description of the plant class. Text, up to 30 characters: "Title V Permit", "FEDOOP Permit" (STAR-applicable), "STAR-Exempt FEDOOP Permit", "Minor Source Permit", "Registered Source", "Exempt Source"
  11. Permit Description: A brief description of the permitted facility site (plant) Text, no limit: Should not be blank.
  12. Permit Type Code: The data system code for the permit type. Text, 6 characters: "APCDOP"
  13. Subtype Code: The data system code for the permit subtype. Text, up to 10 characters: "TITLE V" = Title V Permit, "FEDOOP" = STAR-Applicable FEDOOP Permit, "FEDOOPSE" = STAR-Exempt FEDOOP Permit, "MINOR" = Minor Source Permit, "REGISTERED" = Registered Source, "EXEMPT" = Exempt Source
  14. ID: Arbitrary identifier assigned by the open data portal. Long Integer: Positive integers
Contact Name
Purdon, Andy
Contact Email
Public Access Level