EnviroNearby

Newton County, Arkansas air quality history

Daily Air Quality Index summaries from EPA monitors in Newton, Arkansas, 1991–2025.

90%
Good days in 2025
38
Median daily AQI, 2025
0
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 Newton, Arkansas on 364 days. 329 of those days (90%) were in the Good range, and the median daily AQI was 38. That median is lower than the typical monitored county in Arkansas (median 46 across 11 counties), and about the same as the typical monitored U.S. county (40). The main pollutant was ozone on 342 days. Across the years with fuller monitoring, the share of Good days rose: an average of 72% in 1992–1994 versus 89% in 2023–2025.

Years with fewer than 120 monitored days (1991) 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%1991: Good 3 of 4 days1991: Moderate 1 of 4 days19911992: Good 87 of 136 days1992: Moderate 47 of 136 days1992: Unhealthy 2 of 136 days1993: Good 288 of 357 days1993: Moderate 67 of 357 days1993: Unhealthy for Sensitive Groups 2 of 357 days1994: Good 256 of 362 days1994: Moderate 98 of 362 days1994: Unhealthy for Sensitive Groups 8 of 362 days1995: Good 262 of 352 days1995: Moderate 86 of 352 days1995: Unhealthy for Sensitive Groups 4 of 352 days1996: Good 268 of 365 days1996: Moderate 93 of 365 days1996: Unhealthy for Sensitive Groups 4 of 365 days19961997: Good 242 of 359 days1997: Moderate 108 of 359 days1997: Unhealthy for Sensitive Groups 9 of 359 days1998: Good 230 of 365 days1998: Moderate 123 of 365 days1998: Unhealthy for Sensitive Groups 11 of 365 days1998: Unhealthy 1 of 365 days1999: Good 206 of 348 days1999: Moderate 119 of 348 days1999: Unhealthy for Sensitive Groups 22 of 348 days1999: Unhealthy 1 of 348 days2000: Good 242 of 363 days2000: Moderate 107 of 363 days2000: Unhealthy for Sensitive Groups 14 of 363 days2001: Good 253 of 357 days2001: Moderate 96 of 357 days2001: Unhealthy for Sensitive Groups 8 of 357 days20012002: Good 259 of 359 days2002: Moderate 81 of 359 days2002: Unhealthy for Sensitive Groups 17 of 359 days2002: Unhealthy 2 of 359 days2003: Good 250 of 362 days2003: Moderate 103 of 362 days2003: Unhealthy for Sensitive Groups 6 of 362 days2003: Unhealthy 3 of 362 days2004: Good 268 of 360 days2004: Moderate 87 of 360 days2004: Unhealthy for Sensitive Groups 5 of 360 days2005: Good 268 of 364 days2005: Moderate 91 of 364 days2005: Unhealthy for Sensitive Groups 5 of 364 days2006: Good 234 of 363 days2006: Moderate 125 of 363 days2006: Unhealthy for Sensitive Groups 4 of 363 days20062007: Good 260 of 364 days2007: Moderate 96 of 364 days2007: Unhealthy for Sensitive Groups 8 of 364 days2008: Good 284 of 364 days2008: Moderate 80 of 364 days2009: Good 298 of 354 days2009: Moderate 56 of 354 days2010: Good 278 of 365 days2010: Moderate 85 of 365 days2010: Unhealthy for Sensitive Groups 2 of 365 days2011: Good 264 of 365 days2011: Moderate 99 of 365 days2011: Unhealthy for Sensitive Groups 2 of 365 days20112012: Good 271 of 366 days2012: Moderate 93 of 366 days2012: Unhealthy for Sensitive Groups 2 of 366 days2013: Good 306 of 365 days2013: Moderate 59 of 365 days2014: Good 323 of 365 days2014: Moderate 42 of 365 days2015: Good 329 of 365 days2015: Moderate 36 of 365 days2016: Good 337 of 366 days2016: Moderate 29 of 366 days20162017: Good 338 of 365 days2017: Moderate 27 of 365 days2018: Good 326 of 364 days2018: Moderate 38 of 364 days2019: Good 344 of 365 days2019: Moderate 21 of 365 days2020: Good 352 of 364 days2020: Moderate 12 of 364 days2021: Good 340 of 365 days2021: Moderate 25 of 365 days20212022: Good 337 of 365 days2022: Moderate 27 of 365 days2022: Unhealthy for Sensitive Groups 1 of 365 days2023: Good 311 of 364 days2023: Moderate 53 of 364 days2024: Good 334 of 366 days2024: Moderate 32 of 366 days2025: Good 329 of 364 days2025: Moderate 35 of 364 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 year0501001991: 90th percentile AQI 631992: 90th percentile AQI 641993: 90th percentile AQI 611994: 90th percentile AQI 741995: 90th percentile AQI 671996: 90th percentile AQI 711997: 90th percentile AQI 741998: 90th percentile AQI 771999: 90th percentile AQI 902000: 90th percentile AQI 842001: 90th percentile AQI 772002: 90th percentile AQI 802003: 90th percentile AQI 742004: 90th percentile AQI 672005: 90th percentile AQI 712006: 90th percentile AQI 772007: 90th percentile AQI 772008: 90th percentile AQI 642009: 90th percentile AQI 542010: 90th percentile AQI 642011: 90th percentile AQI 642012: 90th percentile AQI 712013: 90th percentile AQI 552014: 90th percentile AQI 522015: 90th percentile AQI 502016: 90th percentile AQI 492017: 90th percentile AQI 482018: 90th percentile AQI 512019: 90th percentile AQI 482020: 90th percentile AQI 462021: 90th percentile AQI 482022: 90th percentile AQI 492023: 90th percentile AQI 582024: 90th percentile AQI 502025: 90th percentile AQI 501991: Median AQI 301992: Median AQI 371993: Median AQI 381994: Median AQI 431995: Median AQI 411996: Median AQI 421997: Median AQI 431998: Median AQI 441999: Median AQI 462000: Median AQI 442001: Median AQI 432002: Median AQI 412003: Median AQI 442004: Median AQI 412005: Median AQI 412006: Median AQI 452007: Median AQI 442008: Median AQI 392009: Median AQI 392010: Median AQI 402011: Median AQI 432012: Median AQI 432013: Median AQI 382014: Median AQI 362015: Median AQI 352016: Median AQI 372017: Median AQI 382018: Median AQI 362019: Median AQI 362020: Median AQI 352021: Median AQI 372022: Median AQI 372023: Median AQI 392024: Median AQI 392025: Median AQI 3819911996200120062011201620212025
  • 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
Ozone34294%
Fine particles (PM2.5)226%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025364329350000385091Ozone
2024366334320000395087Ozone
2023364311530000395890Ozone
20223653372710003749105Ozone
2021365340250000374874Ozone
2020364352120000354684Ozone
2019365344210000364890Ozone
2018364326380000365184Ozone
2017365338270000384863Ozone
2016366337290000374990Ozone
2015365329360000355090Ozone
2014365323420000365287Ozone
2013365306590000385590Ozone
20123662719320004371136Ozone
20113652649920004364108Ozone
20103652788520004064105Ozone
2009354298560000395497Ozone
2008364284800000396484Ozone
20073642609680004477147Ozone
200636323412540004577122Ozone
20053642689150004171115Ozone
20043602688750004167133Ozone
200336225010363004474169Ozone
200235925981172004180159Ozone
20013572539680004377136Ozone
2000363242107140004484129Ozone
1999348206119221004690154Ozone
1998365230123111004477151Ozone
199735924210890004374136Ozone
19963652689340004271133Ozone
19953522628640004167126Ozone
19943622569880004374115Ozone
19933572886720003861108Ozone
1992136874702003764155PM2.5
19914310000306363PM2.5

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 Arkansas with a similar median AQI in 2025

All monitored counties in Arkansas

Source: U.S. EPA AirData, “Annual AQI by County” files for 1991–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem