Houston County, Georgia air quality history

Daily Air Quality Index summaries from EPA monitors in Houston, Georgia, 2000–2025.

61%

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 Houston, Georgia on 364 days. 222 of those days (61%) were in the Good range, and the median daily AQI was 46. That median is about the same as the typical monitored county in Georgia (median 46 across 25 counties), and higher than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 364 days. Across the years with fuller monitoring, the share of Good days rose: an average of 22% in 2008–2010 versus 60% in 2023–2025.

Years with fewer than 120 monitored days (2002, 2003, 2004, 2005, 2006, 2007…) 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)	364	100%

Year-by-year data

Annual AQI summary by year
Year	Days with AQI	Good	Moderate	Unhealthy for Sensitive Groups	Unhealthy	Very Unhealthy	Median AQI	90th pct.	Max AQI	Main pollutant
2025	364	222	142	0	0	0	46	61	93	PM2.5
2024	362	247	114	1	0	0	43	60	105	PM2.5
2023	365	190	174	0	1	0	49	66	152	PM2.5
2022	362	214	147	1	0	0	45	61	102	PM2.5
2021	359	182	173	4	0	0	49	65	111	PM2.5
2020	363	202	160	1	0	0	47	62	114	PM2.5
2019	354	173	179	1	1	0	51	65	153	PM2.5
2018	322	196	124	2	0	0	46	63	108	PM2.5
2017	330	183	147	0	0	0	47	61	93	PM2.5
2016	352	222	128	2	0	0	44	58	107	PM2.5
2015	363	202	161	0	0	0	47	60	96	PM2.5
2014	348	115	230	3	0	0	55	68	129	PM2.5
2013	351	166	185	0	0	0	51	64	88	PM2.5
2012	330	116	213	1	0	0	53	64	142	PM2.5
2011	363	104	259	0	0	0	58	76	96	PM2.5
2010	331	79	252	0	0	0	57	73	99	PM2.5
2009	308	67	240	1	0	0	57	71	111	PM2.5
2008	341	69	269	3	0	0	58	73	117	PM2.5
2007	103	29	69	3	1	1	56	77	209	PM2.5
2006	60	11	49	0	0	0	61	76	89	PM2.5
2005	56	14	42	0	0	0	57	75	94	PM2.5
2004	58	12	46	0	0	0	57	77	97	PM2.5
2003	59	15	44	0	0	0	56	78	85	PM2.5
2002	55	16	38	1	0	0	56	69	102	PM2.5
2001	47	13	33	1	0	0	57	72	123	PM2.5
2000	21	3	17	1	0	0	71	89	150	PM2.5

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 Georgia with a similar median AQI in 2025

All monitored counties in Georgia

Source: U.S. EPA AirData, “Annual AQI by County” files for 2000–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem