EnviroNearby

Kleberg County, Texas air quality history

Daily Air Quality Index summaries from EPA monitors in Kleberg, Texas, 2003–2025.

52%
Good days in 2025
49
Median daily AQI, 2025
1
Days above 100 in 2025
120
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Kleberg, Texas on 120 days. 62 of those days (52%) were in the Good range, and the median daily AQI was 49. That median is higher than the typical monitored county in Texas (median 43.5 across 44 counties), and higher than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 120 days. Across the years with fuller monitoring, the share of Good days rose: an average of 48% in 2005–2007 versus 56% in 2023–2025.

EPA did not report an AQI for every day of 2025 here (120 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.

Years with fewer than 120 monitored days (2003, 2004) 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%2003: Good 33 of 55 days2003: Moderate 22 of 55 days20032004: Good 42 of 60 days2004: Moderate 18 of 60 days2005: Good 165 of 346 days2005: Moderate 179 of 346 days2005: Unhealthy for Sensitive Groups 2 of 346 days20052006: Good 161 of 338 days2006: Moderate 176 of 338 days2006: Unhealthy for Sensitive Groups 1 of 338 days2007: Good 177 of 365 days2007: Moderate 180 of 365 days2007: Unhealthy for Sensitive Groups 8 of 365 days20072008: Good 160 of 338 days2008: Moderate 175 of 338 days2008: Unhealthy for Sensitive Groups 3 of 338 days2009: Good 146 of 322 days2009: Moderate 176 of 322 days20092010: Good 171 of 307 days2010: Moderate 136 of 307 days2011: Good 108 of 237 days2011: Moderate 128 of 237 days2011: Unhealthy for Sensitive Groups 1 of 237 days20112012: Good 187 of 328 days2012: Moderate 141 of 328 days2013: Good 232 of 349 days2013: Moderate 116 of 349 days2013: Unhealthy for Sensitive Groups 1 of 349 days20132014: Good 213 of 343 days2014: Moderate 130 of 343 days2015: Good 218 of 354 days2015: Moderate 136 of 354 days20152016: Good 109 of 153 days2016: Moderate 44 of 153 days2017: Good 215 of 344 days2017: Moderate 129 of 344 days20172018: Good 188 of 342 days2018: Moderate 150 of 342 days2018: Unhealthy for Sensitive Groups 3 of 342 days2018: Unhealthy 1 of 342 days2019: Good 182 of 284 days2019: Moderate 102 of 284 days20192020: Good 181 of 330 days2020: Moderate 143 of 330 days2020: Unhealthy for Sensitive Groups 4 of 330 days2020: Unhealthy 2 of 330 days2021: Good 185 of 348 days2021: Moderate 162 of 348 days2021: Unhealthy for Sensitive Groups 1 of 348 days20212022: Good 196 of 347 days2022: Moderate 147 of 347 days2022: Unhealthy for Sensitive Groups 4 of 347 days2023: Good 190 of 329 days2023: Moderate 139 of 329 days20232024: Good 204 of 349 days2024: Moderate 141 of 349 days2024: Unhealthy for Sensitive Groups 4 of 349 days2025: Good 62 of 120 days2025: Moderate 57 of 120 days2025: Unhealthy for Sensitive Groups 1 of 120 days2025
  • 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 year0501002003: 90th percentile AQI 642004: 90th percentile AQI 572005: 90th percentile AQI 652006: 90th percentile AQI 682007: 90th percentile AQI 742008: 90th percentile AQI 692009: 90th percentile AQI 662010: 90th percentile AQI 642011: 90th percentile AQI 652012: 90th percentile AQI 642013: 90th percentile AQI 612014: 90th percentile AQI 632015: 90th percentile AQI 652016: 90th percentile AQI 582017: 90th percentile AQI 612018: 90th percentile AQI 692019: 90th percentile AQI 612020: 90th percentile AQI 702021: 90th percentile AQI 682022: 90th percentile AQI 652023: 90th percentile AQI 662024: 90th percentile AQI 712025: 90th percentile AQI 742003: Median AQI 462004: Median AQI 442005: Median AQI 512006: Median AQI 512007: Median AQI 512008: Median AQI 512009: Median AQI 522010: Median AQI 472011: Median AQI 522012: Median AQI 462013: Median AQI 412014: Median AQI 432015: Median AQI 442016: Median AQI 372017: Median AQI 432018: Median AQI 472019: Median AQI 412020: Median AQI 462021: Median AQI 482022: Median AQI 472023: Median AQI 442024: Median AQI 432025: Median AQI 49200320052007200920112013201520172019202120232025
  • 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.

PollutantDays as main pollutantShare of monitored days
Fine particles (PM2.5)120100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025120625710004974107PM2.5
202434920414140004371121PM2.5
20233291901390000446689PM2.5
202234719614740004765133PM2.5
202134818516210004868109PM2.5
202033018114342004670174PM2.5
20192841821020000416189PM2.5
201834218815031004769164PM2.5
20173442151290000436198PM2.5
2016153109440000375893PM2.5
20153542181360000446595PM2.5
20143432131300000436399PM2.5
201334923211610004161107PM2.5
20123281871410000466490PM2.5
201123710812810005265109PM2.5
20103071711360000476492PM2.5
20093221461760000526691PM2.5
200833816017530005169115PM2.5
200736517718080005174133PM2.5
200633816117610005168102PM2.5
200534616517920005165114PM2.5
20046042180000445771PM2.5
20035533220000466481PM2.5

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 Texas with a similar median AQI in 2025

All monitored counties in Texas

Source: U.S. EPA AirData, “Annual AQI by County” files for 2003–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem