EnviroNearby

Lowndes County, Mississippi air quality history

Daily Air Quality Index summaries from EPA monitors in Lowndes, Mississippi, 1987–2009.

57%
Good days in 1988
48
Median daily AQI, 1988
34
Days above 100 in 1988
254
Days with an AQI in 1988 (of 366)

In 1988, EPA reported a daily Air Quality Index (AQI) for Lowndes, Mississippi on 254 days. 144 of those days (57%) were in the Good range, and the median daily AQI was 48. That median is higher than the typical monitored county in Mississippi (median 44 across 10 counties), and higher than the typical monitored U.S. county (42). The main pollutant was ozone on 254 days.

EPA did not report an AQI for every day of 1988 here (254 of 366 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 2009; EPA's files for 2010–2025 contain no row for it, which usually means its monitors stopped reporting.

Years with fewer than 120 monitored days (2004, 2005, 2006, 2007, 2008, 2009…) 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.

Share of monitored days in each AQI category, by year0%25%50%75%100%1987: Good 199 of 275 days1987: Moderate 68 of 275 days1987: Unhealthy for Sensitive Groups 8 of 275 days19871988: Good 144 of 254 days1988: Moderate 76 of 254 days1988: Unhealthy for Sensitive Groups 30 of 254 days1988: Unhealthy 4 of 254 days19881999: Good 12 of 97 days1999: Moderate 82 of 97 days1999: Unhealthy for Sensitive Groups 3 of 97 days19992000: Good 27 of 117 days2000: Moderate 89 of 117 days2000: Unhealthy for Sensitive Groups 1 of 117 days20002001: Good 35 of 116 days2001: Moderate 80 of 116 days2001: Unhealthy for Sensitive Groups 1 of 116 days20012002: Good 35 of 108 days2002: Moderate 71 of 108 days2002: Unhealthy for Sensitive Groups 2 of 108 days20022003: Good 26 of 103 days2003: Moderate 77 of 103 days20032004: Good 41 of 112 days2004: Moderate 70 of 112 days2004: Unhealthy for Sensitive Groups 1 of 112 days20042005: Good 35 of 99 days2005: Moderate 62 of 99 days2005: Unhealthy for Sensitive Groups 2 of 99 days20052006: Good 36 of 118 days2006: Moderate 81 of 118 days2006: Unhealthy for Sensitive Groups 1 of 118 days20062007: Good 36 of 115 days2007: Moderate 77 of 115 days2007: Unhealthy for Sensitive Groups 2 of 115 days20072008: Good 41 of 115 days2008: Moderate 74 of 115 days20082009: Good 58 of 113 days2009: Moderate 55 of 113 days2009
  • 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 and 90th-percentile daily AQI, by year0501001501987: 90th percentile AQI 841988: 90th percentile AQI 1081999: 90th percentile AQI 852000: 90th percentile AQI 812001: 90th percentile AQI 752002: 90th percentile AQI 782003: 90th percentile AQI 742004: 90th percentile AQI 692005: 90th percentile AQI 802006: 90th percentile AQI 742007: 90th percentile AQI 802008: 90th percentile AQI 692009: 90th percentile AQI 621987: Median AQI 431988: Median AQI 481999: Median AQI 642000: Median AQI 602001: Median AQI 582002: Median AQI 552003: Median AQI 572004: Median AQI 552005: Median AQI 562006: Median AQI 552007: Median AQI 562008: Median AQI 542009: Median AQI 481987198819992000200120022003200420052006200720082009
  • Median daily AQI
  • 90th-percentile daily AQI

Main pollutant by day, 1988

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.

PollutantDays as main pollutantShare of monitored days
Ozone254100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
200911358550000486274PM2.5
200811541740000546993PM2.5
2007115367720005680112PM2.5
2006118368110005574104PM2.5
200599356220005680117PM2.5
2004112417010005569103PM2.5
200310326770000577495PM2.5
2002108357120005578122PM2.5
2001116358010005875119PM2.5
2000117278910006081116PM2.5
199997128230006485123PM2.5
1988254144763040048108182Ozone
19872751996880004384136Ozone

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 1987–2009 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem