EnviroNearby

Northampton County, North Carolina air quality history

Daily Air Quality Index summaries from EPA monitors in Northampton, North Carolina, 1995–2025.

78%
Good days in 2025
33
Median daily AQI, 2025
0
Days above 100 in 2025
351
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Northampton, North Carolina on 351 days. 274 of those days (78%) were in the Good range, and the median daily AQI was 33. That median is lower than the typical monitored county in North Carolina (median 39 across 33 counties), and lower than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 351 days. Across the years with fuller monitoring, the share of Good days rose: an average of 56% in 1995–1998 versus 76% 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.

Share of monitored days in each AQI category, by year0%25%50%75%100%1995: Good 126 of 209 days1995: Moderate 62 of 209 days1995: Unhealthy for Sensitive Groups 18 of 209 days1995: Unhealthy 3 of 209 days19951997: Good 111 of 209 days1997: Moderate 73 of 209 days1997: Unhealthy for Sensitive Groups 20 of 209 days1997: Unhealthy 5 of 209 days1998: Good 119 of 214 days1998: Moderate 72 of 214 days1998: Unhealthy for Sensitive Groups 19 of 214 days1998: Unhealthy 4 of 214 days19981999: Good 114 of 208 days1999: Moderate 54 of 208 days1999: Unhealthy for Sensitive Groups 31 of 208 days1999: Unhealthy 9 of 208 days2000: Good 124 of 212 days2000: Moderate 75 of 212 days2000: Unhealthy for Sensitive Groups 12 of 212 days2000: Unhealthy 1 of 212 days20002001: Good 126 of 214 days2001: Moderate 66 of 214 days2001: Unhealthy for Sensitive Groups 22 of 214 days2002: Good 119 of 211 days2002: Moderate 57 of 211 days2002: Unhealthy for Sensitive Groups 23 of 211 days2002: Unhealthy 12 of 211 days20022003: Good 133 of 203 days2003: Moderate 58 of 203 days2003: Unhealthy for Sensitive Groups 11 of 203 days2003: Unhealthy 1 of 203 days2019: Good 102 of 153 days2019: Moderate 51 of 153 days20192020: Good 303 of 360 days2020: Moderate 57 of 360 days2021: Good 270 of 363 days2021: Moderate 93 of 363 days20212022: Good 284 of 362 days2022: Moderate 78 of 362 days2023: Good 256 of 365 days2023: Moderate 108 of 365 days2023: Unhealthy for Sensitive Groups 1 of 365 days20232024: Good 289 of 366 days2024: Moderate 77 of 366 days2025: Good 274 of 351 days2025: Moderate 77 of 351 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 year0501001501995: 90th percentile AQI 1011997: 90th percentile AQI 1121998: 90th percentile AQI 1011999: 90th percentile AQI 1222000: 90th percentile AQI 902001: 90th percentile AQI 1012002: 90th percentile AQI 1222003: 90th percentile AQI 872019: 90th percentile AQI 562020: 90th percentile AQI 532021: 90th percentile AQI 572022: 90th percentile AQI 552023: 90th percentile AQI 602024: 90th percentile AQI 552025: 90th percentile AQI 551995: Median AQI 461997: Median AQI 491998: Median AQI 481999: Median AQI 492000: Median AQI 452001: Median AQI 472002: Median AQI 472003: Median AQI 442019: Median AQI 432020: Median AQI 292021: Median AQI 342022: Median AQI 332023: Median AQI 372024: Median AQI 322025: Median AQI 3319951998200020022019202120232025
  • 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)351100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025351274770000335579PM2.5
2024366289770000325582PM2.5
202336525610810003760134PM2.5
2022362284780000335571PM2.5
2021363270930000345794PM2.5
2020360303570000295390PM2.5
2019153102510000435674PM2.5
200320313358111004487154Ozone
20022111195723120047122190Ozone
2001214126662200047101147Ozone
200021212475121004590151Ozone
1999208114543190049122177Ozone
1998214119721940048101192Ozone
1997209111732050049112159Ozone
1995209126621830046101166Ozone

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 North Carolina with a similar median AQI in 2025

All monitored counties in North Carolina

Source: U.S. EPA AirData, “Annual AQI by County” files for 1995–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem