About APCD

For more than 60 years, the Louisville Metro Air Pollution Control District has worked to ensure cleaner air for the residents of Jefferson County, Kentucky. APCD implements the Federal Clean Air Act in Louisville. As a part of the Louisville Metro Economic Growth & Innovation Department, APCD works in partnership with the U. S. Environmental Protection Agency, the Kentucky Division for Air Quality, and the Indiana Department of Environmental Management to protect air quality in Louisville. Additional information on APCD can be found in the Protecting Louisville's Air Quality presentation.

Mission Statement

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 for future generations.

APCD is governed by the Air Pollution Control Board, which includes seven members appointed by the Mayor of Louisville and approved by the Louisville Metro Council. For more information please visit the Air Pollution Control Board page. See also APCD's organizational chart.


What We Do

With a staff of 70 people, APCD employs air quality and environmental professionals, engineers, inspectors, and technicians who operate and maintain air quality monitoring equipment. In addition, the agency is supported by in-house computer services, communications, legal services, records management, accounting and administrative staff.


The administrative section, which includes the office of the Executive Director, ensures effective and efficient management of all aspects of the agency to help achieve its mission. This section provides internal services such as, information technology support, budgeting and payroll, and grants oversight as well as external services including:

Air Monitoring

The air monitoring section collects and analyzes air quality data. This section monitors ambient air pollution, measures meteorological data, quality assures data, and helps forecast air quality for Louisville. For more information please visit the Air Monitoring page.


The enforcement section is responsible for enforcing APCD regulations. It coordinates with the agency’s engineering and environmental compliance sections to ensure industry, commercial business and the public comply with APCD regulations. This section issues notices of violation and works with the Jefferson County Attorney’s Office to:

  • Settle violations through board orders and agreements
  • Resolve violations through administrative hearings
  • Prosecute violations of APCD regulations, when necessary


The engineering section is responsible for permitting point sources of air emissions which includes implementing the Strategic Toxic Air Reduction (STAR) Program. It focuses on large “stationary” sources (e.g., utilities and chemical plants) and smaller “area” sources (e.g., dry cleaners and auto body shops). This section provides services to Louisville’s business and industrial communities including:

Community Compliance

The environmental compliance section investigates citizen complaints about air pollution. The most common complaints are about foul odors and outdoor burning. Environmental Compliance staff are duly sworn peace officers with the power to enter and inspect industrial premises for suspected violations of air quality laws. This section is also responsible for permitting and compliance for several common activities including:

Environmental Programs

The environmental programs section provides air quality planning services, assists with policy development, and coordinates agency programs. This section works with a wide variety of stakeholders, including APCD staff, other government agencies, businesses, and the general public to provide the following:

Public Information

The public information section is responsible for organizing information internally and communicating information about the Air Pollution Control District to the public. This section also oversees Kentuckiana Air Education (KAIRE), the APCD's education and outreach effort.


History of Air Pollution Control in Louisville

In the 1940s, Louisvillians were still heating their homes with coal. At the same time, industry was expanding, partly due to World War II. Louisville’s Rubbertown is a good example, as it sprang up during the war to supply synthetic rubber to the military. Prosperity increased, and so did air pollution.

Everyone could see that coal smoke was a problem, but the government had no legal authority to address it until 1945 when the Louisville Board of Aldermen passed a smoke ordinance. The ordinance also created the Louisville Smoke Commission to figure out ways to address the problem of air pollution. The Commission had no control over private residences and no jurisdiction outside the city limits, including Rubbertown.

In 1952, the Kentucky legislature passed KRS Chapter 77 authorizing the formation of county air pollution control districts. The same year, the Air Pollution Control District of Jefferson County was created and staffed with air quality professionals to study and improve air quality in Louisville. It was governed by the new Air Pollution Control Board, which replaced the Louisville Smoke Commission. The Board’s jurisdiction expanded air pollution regulation beyond the city limits to include all industrial plants in Jefferson County, including those in Rubbertown. During this time, APCD measured air pollution by collecting soot in buckets hung from lampposts around the county.

In 1956, APCD took part in a pioneering air pollution study that brought city, county, state, and federal agencies together to understand pollution in Rubbertown. The study ran for two years and produced a wealth of information including an inventory of air pollution sources in Louisville, an air sampling program, a network to collect meteorological data, and threshold concentrations for odor nuisance. The study made several recommendations to improve air quality, including:

  • Emission limits for solid particles
  • Limited sulfur content for coal burned
  • Controls for hydrocarbon vapors
  • Odor nuisance and open burning regulations
  • Considering of air pollution in planning and zoning decisions
  • An education and outreach program

In 1966, the Kentucky Air Pollution Control Commission was created and adopted a regulation requiring that all discharges of material into the air must be reported and registered with the Commission, which included emissions in Louisville. The state reaffirmed authority to control air pollution in Jefferson County to the Air Pollution Control Board in 1968.

The year 1970 was full of air pollution control milestones. Congress passed the Clean Air Act that year and in Louisville the APCD began requiring permits for construction and operation of sources of air contaminants. Also of note, the APCD completed its first emissions inventory for Jefferson County.

Over the years, the APCD began to implement reduction strategies for sources beyond large industrial polluters. In 1970, leaf burning was banned and in 1971 the APCD began ticketing drivers for smoking vehicles.

Then in 1977, the Clean Air Act was amended. The new rules required several large scale pollution reduction programs in Louisville including the Vehicle Emissions Testing (VET) program which began in 1984. The VET program required annual emissions tests from all vehicles in Louisville, except construction and farm equipment. The amendments also required APCD to review traffic-control plans for new development in Louisville.

The Clean Air Act was amended again in 1990, bringing significant changes to the world of air pollution control. The federal government began to tighten tailpipe emission standards for vehicles and required the sale of cleaner-burning gasoline in the most polluted cities. In 1995, Louisville gas stations were required to sell reformulated gasoline to reduce smog-forming pollution from vehicle exhaust. The 1990 amendments also created the Acid Rain program to reduce sulfur dioxide (SO2) emissions nationwide as well as a federal program to reduce emissions of toxic pollutants.

In 2003, the VET program ended. In the same year, the city and county governments merged. APCD, which was an agency of the Jefferson County government until merger, was renamed the Louisville Metro Air Pollution Control District.

Responding to growing concerns about toxic emissions in Western Louisville, in 2005 the APCD developed and implemented the Strategic Toxic Air Reduction (STAR) program. An air toxics program designed to regulate the reduction of toxic emissions by large industries, STAR was created after a monitoring study in 2000-2001 found unsafe levels of 18 toxic chemicals present in and around the Rubbertown industrial complex.