Jones County, Mississippi air quality history

Daily Air Quality Index summaries from EPA monitors in Jones, Mississippi, 1991–2012.

17%

Good days in 2010

Median daily AQI, 2010

Days above 100 in 2010

121

Days with an AQI in 2010 (of 365)

In 2010, EPA reported a daily Air Quality Index (AQI) for Jones, Mississippi on 121 days. 20 of those days (17%) were in the Good range, and the median daily AQI was 58. That median is higher than the typical monitored county in Mississippi (median 54 across 11 counties), and higher than the typical monitored U.S. county (44). The main pollutant was fine particles (PM2.5) on 121 days.

EPA did not report an AQI for every day of 2010 here (121 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 2012; EPA's files for 2013–2025 contain no row for it, which usually means its monitors stopped reporting.

Years with fewer than 120 monitored days (2003, 2004, 2005, 2007, 2011, 2012…) 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, 2010

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)	121	100%

Year-by-year data

Annual AQI summary by year
Year	Days with AQI	Good	Moderate	Unhealthy for Sensitive Groups	Median AQI	90th pct.	Max AQI	Main pollutant
2012	58	27	31	0	52	66	92	PM2.5
2011	118	34	84	0	56	72	91	PM2.5
2010	121	20	101	0	58	69	90	PM2.5
2009	123	33	90	0	55	67	93	PM2.5
2008	121	34	87	0	57	73	87	PM2.5
2007	118	22	96	0	59	81	92	PM2.5
2006	120	26	94	0	58	80	98	PM2.5
2005	115	19	93	3	60	81	129	PM2.5
2004	118	25	93	0	58	77	98	PM2.5
2003	117	21	96	0	59	78	94	PM2.5
2002	116	16	97	3	59	73	116	PM2.5
2001	120	34	86	0	59	79	88	PM2.5
2000	118	17	99	2	64	85	123	PM2.5
1999	107	17	88	2	66	88	137	PM2.5
1998	58	58	0	0	20	30	50	PM10
1997	59	55	4	0	19	37	60	PM10
1996	61	61	0	0	22	31	44	PM10
1995	59	59	0	0	19	33	47	PM10
1994	58	58	0	0	23	37	43	PM10
1993	61	59	2	0	19	32	51	PM10
1992	57	56	1	0	19	31	51	PM10
1991	45	45	0	0	20	36	50	PM10

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.

All monitored counties in Mississippi

Source: U.S. EPA AirData, “Annual AQI by County” files for 1991–2012 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem