Floyd County, Kentucky air quality history

Daily Air Quality Index summaries from EPA monitors in Floyd, Kentucky, 1981–1999.

64%

Good days in 1983

Median daily AQI, 1983

Days above 100 in 1983

179

Days with an AQI in 1983 (of 365)

In 1983, EPA reported a daily Air Quality Index (AQI) for Floyd, Kentucky on 179 days. 114 of those days (64%) were in the Good range, and the median daily AQI was 44. That median is about the same as the typical monitored county in Kentucky (median 45 across 31 counties), and higher than the typical monitored U.S. county (40). The main pollutant was ozone on 179 days.

EPA did not report an AQI for every day of 1983 here (179 of 365 days). Figures describe monitored days only; seasonal monitoring (for example, ozone measured only in warmer months) can make a county look cleaner or dirtier than a full-year record would.

The most recent year with data for this county is 1999; EPA's files for 2000–2025 contain no row for it, which usually means its monitors stopped reporting.

Years with fewer than 120 monitored days (1994, 1995, 1996, 1997, 1998, 1999…) are shown in the table but left out of comparisons and trend statements.

How the days broke down each year

Each bar is one year. The colored segments show the share of monitored days that fell in each AQI category.

Good
Moderate
Unhealthy for Sensitive Groups
Unhealthy
Very Unhealthy
Hazardous

Typical and high-end AQI over time

The median is the middle day of the year. The 90th percentile is the level that only the highest 10% of days exceeded.

Median daily AQI
90th-percentile daily AQI

Main pollutant by day, 1983

On each monitored day, the AQI reflects whichever measured pollutant had the highest index. This counts how many days each pollutant set the AQI. A pollutant that was not measured here cannot appear.

Pollutant	Days as main pollutant	Share of monitored days
Ozone	179	100%

Year-by-year data

Annual AQI summary by year
Year	Days with AQI	Good	Moderate	Unhealthy for Sensitive Groups	Unhealthy	Median AQI	90th pct.	Max AQI	Main pollutant
1999	59	59	0	0	0	21	43	50	PM10
1998	61	61	0	0	0	17	32	36	PM10
1997	57	56	1	0	0	18	31	52	PM10
1996	57	56	1	0	0	19	36	66	PM10
1995	58	56	2	0	0	23	38	75	PM10
1994	52	50	2	0	0	24	40	56	PM10
1993	58	58	0	0	0	20	38	50	PM10
1992	56	56	0	0	0	23	38	45	PM10
1991	44	43	1	0	0	28	42	65	PM10
1983	179	114	52	13	0	44	97	147	Ozone
1982	184	125	45	10	4	44	90	161	Ozone
1981	120	92	26	2	0	37	77	122	Ozone

What this data can and can’t tell you

It is a county-level summary. EPA reports one AQI per day for the county, based on the monitors operating there. Air at a particular street, school or home can differ, especially near roads, industry or wildfire smoke.

It is not a health assessment. The AQI is EPA’s scale for communicating daily air quality. A county’s history can’t tell you what the health risk is for any particular person. For daily conditions and health guidance, see AirNow.

Rules change over time. EPA has revised AQI breakpoints, most recently for fine particles in 2024, so some year-to-year change can reflect the scale rather than the air.

Counties in Kentucky with a similar median AQI in 1983

All monitored counties in Kentucky

Source: U.S. EPA AirData, “Annual AQI by County” files for 1981–1999 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem