Jackson County, Oregon air quality history

Daily Air Quality Index summaries from EPA monitors in Jackson, Oregon, 1980–2025.

66%

Good days in 2025

Median daily AQI, 2025

Days above 100 in 2025

365

Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Jackson, Oregon on 365 days. 242 of those days (66%) were in the Good range, and the median daily AQI was 43. That median is higher than the typical monitored county in Oregon (median 29 across 21 counties), and higher than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 242 days. Across the years with fuller monitoring, the share of Good days rose: an average of 13% in 1980–1982 versus 66% in 2023–2025.

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)	242	66%
Ozone	123	34%

Year-by-year data

Annual AQI summary by year
Year	Days with AQI	Good	Moderate	Unhealthy for Sensitive Groups	Unhealthy	Very Unhealthy	Hazardous	Median AQI	90th pct.	Max AQI	Main pollutant
2025	365	242	121	1	1	0	0	43	67	152	PM2.5
2024	366	262	99	4	1	0	0	41	71	155	PM2.5
2023	365	216	135	2	7	5	0	45	69	237	PM2.5
2022	365	211	146	5	3	0	0	44	69	165	PM2.5
2021	365	204	126	6	19	10	0	48	99	266	PM2.5
2020	366	218	133	2	4	3	6	44	73	900	PM2.5
2019	365	249	109	3	4	0	0	41	64	190	PM2.5
2018	364	190	132	11	25	6	0	48	121	258	PM2.5
2017	365	211	123	16	9	4	2	45	95	461	PM2.5
2016	366	263	103	0	0	0	0	41	60	83	PM2.5
2015	365	191	145	18	8	2	1	49	91	319	PM2.5
2014	365	218	145	2	0	0	0	45	70	121	PM2.5
2013	365	148	194	12	8	3	0	55	93	263	PM2.5
2012	366	196	167	3	0	0	0	49	72	110	PM2.5
2011	363	231	129	3	0	0	0	43	78	121	PM2.5
2010	365	262	103	0	0	0	0	39	62	93	PM2.5
2009	365	217	139	7	2	0	0	45	80	178	PM2.5
2008	366	190	167	9	0	0	0	49	80	143	PM2.5
2007	365	199	163	3	0	0	0	46	80	119	PM2.5
2006	365	189	171	5	0	0	0	49	74	139	PM2.5
2005	365	179	175	10	1	0	0	51	82	151	PM2.5
2004	366	195	161	10	0	0	0	49	83	119	PM2.5
2003	365	261	97	7	0	0	0	38	74	129	Ozone
2002	365	145	190	25	5	0	0	56	95	160	PM2.5
2001	365	171	187	6	0	0	1	52	77	314	PM2.5
2000	366	173	171	21	1	0	0	52	88	151	PM2.5
1999	365	184	162	15	4	0	0	50	82	156	PM2.5
1998	365	299	55	8	3	0	0	41	60	169	CO
1997	365	288	77	0	0	0	0	42	57	90	CO
1996	366	282	76	7	1	0	0	40	67	151	CO
1995	365	283	78	4	0	0	0	43	58	119	CO
1994	365	256	107	2	0	0	0	45	64	104	CO
1993	365	261	104	0	0	0	0	42	66	93	CO
1992	366	208	138	19	1	0	0	47	78	154	CO
1991	365	225	136	4	0	0	0	44	74	142	CO
1990	365	184	174	7	0	0	0	50	81	140	CO
1989	363	144	196	23	0	0	0	54	94	148	CO
1988	366	101	246	18	1	0	0	59	89	154	CO
1987	365	111	240	14	0	0	0	61	89	148	CO
1986	365	49	290	24	2	0	0	69	96	156	CO
1985	365	50	277	25	9	4	0	67	108	240	CO
1984	365	60	282	22	1	0	0	66	93	154	CO
1983	365	51	283	27	3	1	0	68	97	204	CO
1982	365	39	288	33	5	0	0	73	101	181	CO
1981	365	43	285	34	3	0	0	73	101	193	CO
1980	365	57	239	52	14	3	0	80	122	226	CO

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 Oregon with a similar median AQI in 2025

All monitored counties in Oregon

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