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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.

Other Access

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

JSON RDF

via the DKAN API

Data Extent

Local Air Quality API

API operated by Louisville Metro that returns AQI information from local sensors operated by APCD. Shows the latest hourly data in a JSON feed.

The Air Quality Index (AQI) is an easy way to tell you about air quality without having to know a lot of technical details. The “Metropolitan Air Quality Index” shows the AQI from the monitor in Kentuckiana that is currently detecting the highest level of air pollution. See: https://louisvilleky.gov/government/air-pollution-control-district/servi...

See the air quality map (Louisville Air Watch) for more details: http://airqualitymap.louisvilleky.gov/#

Read the FAQ for more information about the AQI data: https://louisvilleky.gov/government/air-pollution-control-district/louis...

If you'd prefer air quality forecast data (raw data, maps, API) instead, please see AIRNow: https://www.airnow.gov/index.cfm?action=airnow.local_city&zipcode=40204&...

See the Data Dictionary section below for information about what the AQI numbers mean, their corresponding colors, recommendations, and more info and links.

To download daily snapshots of AQI for the last 25 years, visit the EPA website, set your year range, and choose, Louisville KY. Then download with the CSV link at the bottom of the page.

Data and Resources

FieldValue
Publisher
Modified
2019-03-09
Release Date
2016-06-30
Frequency
Continuously
Homepage URL
Identifier
d6c7b77e-24b7-4e02-9c3a-391ea03e91a1
Spatial / Geographical Coverage Area
MULTIPOLYGON (((-86.330019 38.181151, -86.312786 38.178126, -86.306511 38.202519, -86.289903 38.202692, -86.294927 38.223964, -86.276956 38.227126, -86.274762 38.279956, -86.253427 38.291422, -86.26439 38.294662, -86.259348 38.30614, -86.289669 38.316091, -86.273474 38.321105, -86.275142 38.349515, -86.265003 38.362005, -86.250781 38.348464, -86.248372 38.363692, -86.256171 38.365565, -86.259489 38.388927, -86.251716 38.406132, -86.264841 38.411114, -86.255045 38.422685, -86.308674 38.422875, -86.308701 38.688101, -86.310058 38.733131, -86.290402 38.736323, -86.275281 38.763795, -86.254103 38.770118, -86.237144 38.767797, -86.224068 38.779147, -86.197651 38.773769, -86.184102 38.783588, -86.134944 38.762425, -86.102356 38.765755, -86.091705 38.783399, -86.075066 38.774727, -86.064206 38.778645, -86.040583 38.760888, -86.014891 38.756989, -85.984252 38.768115, -85.976641 38.752393, -85.960862 38.764185, -85.948377 38.753636, -85.938703 38.762425, -85.916663 38.74566, -85.901055 38.753814, -85.892504 38.729632, -85.888334 38.734443, -85.881404 38.725026, -85.869559 38.726171, -85.804554 38.779906, -85.795357 38.807508, -85.733191 38.831812, -85.683839 38.815406, -85.683338 38.736731, -85.664357 38.736888, -85.664274 38.730018, -85.646218 38.729859, -85.64576 38.708018, -85.608678 38.707858, -85.60819 38.67874, -85.57093 38.678706, -85.56998 38.606155, -85.496666 38.606736, -85.496452 38.59222, -85.478762 38.586178, -85.42829 38.586326, -85.43617 38.598292, -85.437446 38.601724, -85.438594 38.605405, -85.439351 38.610388, -85.439458 38.632366, -85.437738 38.648898, -85.438742 38.659319, -85.444815 38.670083, -85.455486 38.68209, -85.456481 38.685069, -85.456978 38.689135, -85.455967 38.695655, -85.452114 38.709348, -85.448862 38.713368, -85.442271 38.71985, -85.437766 38.726405, -85.434065 38.729455, -85.422021 38.734834, -85.416631 38.736272, -85.410925 38.73708, -85.400481 38.73598, -85.372284 38.730576, -85.363827 38.730477, -85.351776 38.731638, -85.340953 38.733893, -85.333052 38.736083, -85.329683 38.725817, -85.228976 38.627035, -85.230257 38.617818, -85.213982 38.601346, -85.211375 38.580216, -85.16827 38.585448, -85.074583 38.596838, -85.076118 38.578895, -85.062141 38.564329, -85.04264 38.573862, -85.009185 38.561124, -85.002707 38.55212, -85.029888 38.510765, -85.017363 38.504751, -85.007173 38.513923, -84.985026 38.518405, -84.977166 38.512989, -84.992159 38.495293, -84.988781 38.487085, -84.956842 38.473646, -84.95181 38.456992, -84.963265 38.437358, -84.949835 38.42618, -84.939253 38.427797, -84.938189 38.450414, -84.922642 38.464538, -84.91223 38.459844, -84.909846 38.449384, -84.925023 38.441824, -84.924715 38.431176, -84.895832 38.424854, -84.880248 38.41618, -84.897591 38.389558, -84.894369 38.375308, -84.86835 38.368643, -84.870482 38.356751, -84.892357 38.3552, -84.906256 38.374836, -84.997667 38.335586, -84.956959 38.332271, -84.998898 38.274979, -85.001032 38.226152, -85.00748 38.17578, -85.003837 38.16066, -85.019997 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-85.958299 38.004616, -85.976028 38.00356, -85.996582 38.000073, -85.998967 37.999779, -86.009127 37.998529, -86.020655 37.996116, -86.029509 37.99264, -86.032468 37.9901, -86.035012 37.984814, -86.035279 37.981228, -86.033386 37.970382, -86.034355 37.964621, -86.036013 37.961703, -86.038188 37.95935, -86.042354 37.958018, -86.045208 37.958258, -86.048458 37.959369, -86.053912 37.963571, -86.061731 37.971326, -86.064859 37.975618, -86.071644 37.9872, -86.074915 37.993345, -86.07398 37.995449, -86.075393 37.996948, -86.080034 38.000848, -86.087525 38.005127, -86.095766 38.00893, -86.108156 38.013416, -86.118208 38.015279, -86.12757 38.016011, -86.141063 38.01547, -86.16731 38.009879, -86.172186 38.00992, -86.178983 38.011308, -86.190927 38.016438, -86.206439 38.021876, -86.220371 38.027922, -86.225519 38.03328, -86.233057 38.039305, -86.249972 38.04583, -86.261273 38.052721, -86.266891 38.057125, -86.26731 38.057655, -86.273584 38.067443, -86.27872 38.089303, -86.278656 38.098509, -86.271223 38.130112, -86.271802 38.137874, -86.287773 38.15805, -86.304155 38.167872, -86.317139 38.172907, -86.330019 38.181151)))
Spatial / Geographical Coverage Location
Louisville, KY MSA
License
Other (Public Domain)
Author
Louisville Metro Government
Data Dictionary

AQI Level - Value and Related Health Concerns Legend

Good 0-50 Green
Air quality is considered satisfactory, and air pollution poses little or no risk.

Moderate 51-100 Yellow
Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Unhealthy for Sensitive Groups 101-150 Orange
Members of sensitive groups may experience health effects. The general public is not likely to be affected.

Unhealthy 151-200 Red
Everyone may begin to experience health effects; members of sensitive groups may experience more serious health effects.

Very Unhealthy 201-300 Purple
Health alert: everyone may experience more serious health effects.

Hazardous > 300 Dark Purple
Health warnings of emergency conditions. The entire population is more likely to be affected.

Here are citizen actions APCD recommends on air quality alert days, that is, days when the forecast is for the air quality to reach or exceed the “unhealthy for sensitive groups” (orange) level:

  • Don’t idle your car. (Recommended all the time; see the second link below.)
  • Put off mowing grass with a gas mower until the alert ends.
  • “Refuel when it’s cool” (pump gasoline only in the evening or night).
  • Avoid driving if possible. Share rides or take TARC.
  • Check on neighbors with breathing problems.

Here are some links in relation to the recommendations:
KAIRE
Idle Free Louisville
TARC
Ticket to Ride
Lawn Care for Cleaner Air (rebates)

Contact Name
Bryan Frazar
Contact Email
Public Access Level
Public