Alachua County, Florida air quality history

Daily Air Quality Index summaries from EPA monitors in Alachua, Florida, 1980–2025.

89%

Good days in 2025

Median daily AQI, 2025

Days above 100 in 2025

364

Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Alachua, Florida on 364 days. 323 of those days (89%) were in the Good range, and the median daily AQI was 37. That median is lower than the typical monitored county in Florida (median 41 across 38 counties), and lower than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 191 days. Across the years with fuller monitoring, the share of Good days fell: an average of 87% in 1980–1998 versus 83% in 2023–2025.

Years with fewer than 120 monitored days (1982, 1983, 1993, 1994, 1995, 1996) 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, 2025

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
Fine particles (PM2.5)	191	52%
Ozone	173	48%

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
2025	364	323	41	0	0	37	51	69	PM2.5
2024	349	300	49	0	0	38	52	94	PM2.5
2023	365	270	94	1	0	40	57	104	PM2.5
2022	362	292	70	0	0	41	54	84	PM2.5
2021	364	308	56	0	0	39	52	84	PM2.5
2020	366	274	91	1	0	42	56	105	PM2.5
2019	364	289	75	0	0	39	55	80	PM2.5
2018	364	317	47	0	0	37	52	90	Ozone
2017	355	267	88	0	0	42	57	93	PM2.5
2016	360	278	81	1	0	42	55	101	PM2.5
2015	365	291	74	0	0	39	55	74	PM2.5
2014	361	282	79	0	0	40	55	77	PM2.5
2013	359	278	81	0	0	39	56	100	PM2.5
2012	363	275	85	1	2	39	56	159	Ozone
2011	356	183	171	2	0	49	66	109	PM2.5
2010	365	215	149	1	0	46	62	101	PM2.5
2009	365	272	93	0	0	41	55	98	PM2.5
2008	366	298	66	2	0	36	58	119	Ozone
2007	365	271	83	10	1	43	71	155	Ozone
2006	365	250	105	10	0	43	71	126	Ozone
2005	365	242	114	9	0	43	74	126	Ozone
2004	364	245	110	9	0	42	74	147	Ozone
2003	365	279	79	7	0	39	64	147	Ozone
2002	363	277	82	4	0	39	63	119	Ozone
2001	357	229	113	14	1	44	84	154	Ozone
2000	360	237	108	14	1	41	80	151	Ozone
1999	360	217	123	20	0	44	84	147	Ozone
1998	359	277	55	18	9	39	90	192	Ozone
1997	161	147	7	7	0	31	49	150	Ozone
1996	61	61	0	0	0	17	23	44	PM10
1995	61	61	0	0	0	18	27	46	PM10
1994	61	60	1	0	0	17	31	54	PM10
1993	47	46	1	0	0	20	31	53	PM10
1983	74	73	1	0	0	31	45	84	Ozone
1982	76	76	0	0	0	27	36	49	Ozone
1980	151	140	7	2	2	23	46	177	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 Florida with a similar median AQI in 2025

All monitored counties in Florida

Source: U.S. EPA AirData, “Annual AQI by County” files for 1980–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem