EnviroNearby

Granville County, North Carolina air quality history

Daily Air Quality Index summaries from EPA monitors in Granville, North Carolina, 1980–2025.

93%
Good days in 2025
39
Median daily AQI, 2025
0
Days above 100 in 2025
238
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Granville, North Carolina on 238 days. 222 of those days (93%) were in the Good range, and the median daily AQI was 39. That median is about the same as the typical monitored county in North Carolina (median 39 across 33 counties), and about the same as the typical monitored U.S. county (40). The main pollutant was ozone on 238 days. Across the years with fuller monitoring, the share of Good days rose: an average of 52% in 1980–1982 versus 87% in 2023–2025.

EPA did not report an AQI for every day of 2025 here (238 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.

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%1980: Good 46 of 199 days1980: Moderate 52 of 199 days1980: Unhealthy for Sensitive Groups 65 of 199 days1980: Unhealthy 33 of 199 days1980: Very Unhealthy 3 of 199 days19801981: Good 129 of 223 days1981: Moderate 74 of 223 days1981: Unhealthy for Sensitive Groups 19 of 223 days1981: Unhealthy 1 of 223 days1982: Good 111 of 146 days1982: Moderate 27 of 146 days1982: Unhealthy for Sensitive Groups 7 of 146 days1982: Unhealthy 1 of 146 days1983: Good 90 of 201 days1983: Moderate 55 of 201 days1983: Unhealthy for Sensitive Groups 35 of 201 days1983: Unhealthy 19 of 201 days1983: Very Unhealthy 2 of 201 days1984: Good 101 of 191 days1984: Moderate 55 of 191 days1984: Unhealthy for Sensitive Groups 27 of 191 days1984: Unhealthy 8 of 191 days1985: Good 100 of 186 days1985: Moderate 59 of 186 days1985: Unhealthy for Sensitive Groups 25 of 186 days1985: Unhealthy 2 of 186 days19851986: Good 87 of 204 days1986: Moderate 65 of 204 days1986: Unhealthy for Sensitive Groups 33 of 204 days1986: Unhealthy 19 of 204 days1987: Good 61 of 204 days1987: Moderate 66 of 204 days1987: Unhealthy for Sensitive Groups 45 of 204 days1987: Unhealthy 28 of 204 days1987: Very Unhealthy 4 of 204 days1988: Good 75 of 200 days1988: Moderate 64 of 200 days1988: Unhealthy for Sensitive Groups 33 of 200 days1988: Unhealthy 15 of 200 days1988: Very Unhealthy 13 of 200 days1989: Good 113 of 209 days1989: Moderate 63 of 209 days1989: Unhealthy for Sensitive Groups 26 of 209 days1989: Unhealthy 6 of 209 days1989: Very Unhealthy 1 of 209 days1990: Good 108 of 203 days1990: Moderate 71 of 203 days1990: Unhealthy for Sensitive Groups 21 of 203 days1990: Unhealthy 3 of 203 days19901991: Good 110 of 207 days1991: Moderate 81 of 207 days1991: Unhealthy for Sensitive Groups 12 of 207 days1991: Unhealthy 4 of 207 days1992: Good 114 of 209 days1992: Moderate 70 of 209 days1992: Unhealthy for Sensitive Groups 21 of 209 days1992: Unhealthy 4 of 209 days1993: Good 76 of 209 days1993: Moderate 57 of 209 days1993: Unhealthy for Sensitive Groups 58 of 209 days1993: Unhealthy 17 of 209 days1993: Very Unhealthy 1 of 209 days1994: Good 149 of 226 days1994: Moderate 62 of 226 days1994: Unhealthy for Sensitive Groups 14 of 226 days1994: Unhealthy 1 of 226 days1995: Good 110 of 238 days1995: Moderate 68 of 238 days1995: Unhealthy for Sensitive Groups 52 of 238 days1995: Unhealthy 8 of 238 days19951996: Good 105 of 234 days1996: Moderate 80 of 234 days1996: Unhealthy for Sensitive Groups 38 of 234 days1996: Unhealthy 11 of 234 days1997: Good 108 of 236 days1997: Moderate 68 of 236 days1997: Unhealthy for Sensitive Groups 44 of 236 days1997: Unhealthy 16 of 236 days1998: Good 97 of 213 days1998: Moderate 57 of 213 days1998: Unhealthy for Sensitive Groups 44 of 213 days1998: Unhealthy 14 of 213 days1998: Very Unhealthy 1 of 213 days1999: Good 132 of 208 days1999: Moderate 58 of 208 days1999: Unhealthy for Sensitive Groups 18 of 208 days2000: Good 126 of 214 days2000: Moderate 52 of 214 days2000: Unhealthy for Sensitive Groups 28 of 214 days2000: Unhealthy 8 of 214 days20002001: Good 96 of 213 days2001: Moderate 76 of 213 days2001: Unhealthy for Sensitive Groups 37 of 213 days2001: Unhealthy 3 of 213 days2001: Very Unhealthy 1 of 213 days2002: Good 101 of 209 days2002: Moderate 66 of 209 days2002: Unhealthy for Sensitive Groups 27 of 209 days2002: Unhealthy 14 of 209 days2002: Very Unhealthy 1 of 209 days2003: Good 116 of 205 days2003: Moderate 65 of 205 days2003: Unhealthy for Sensitive Groups 20 of 205 days2003: Unhealthy 4 of 205 days2004: Good 131 of 214 days2004: Moderate 64 of 214 days2004: Unhealthy for Sensitive Groups 19 of 214 days2005: Good 90 of 213 days2005: Moderate 78 of 213 days2005: Unhealthy for Sensitive Groups 42 of 213 days2005: Unhealthy 3 of 213 days20052006: Good 105 of 210 days2006: Moderate 88 of 210 days2006: Unhealthy for Sensitive Groups 16 of 210 days2006: Unhealthy 1 of 210 days2007: Good 86 of 214 days2007: Moderate 101 of 214 days2007: Unhealthy for Sensitive Groups 25 of 214 days2007: Unhealthy 2 of 214 days2008: Good 119 of 214 days2008: Moderate 80 of 214 days2008: Unhealthy for Sensitive Groups 15 of 214 days2009: Good 170 of 214 days2009: Moderate 41 of 214 days2009: Unhealthy for Sensitive Groups 3 of 214 days2010: Good 122 of 214 days2010: Moderate 86 of 214 days2010: Unhealthy for Sensitive Groups 6 of 214 days20102011: Good 130 of 212 days2011: Moderate 78 of 212 days2011: Unhealthy for Sensitive Groups 3 of 212 days2011: Unhealthy 1 of 212 days2012: Good 166 of 214 days2012: Moderate 43 of 214 days2012: Unhealthy for Sensitive Groups 4 of 214 days2012: Unhealthy 1 of 214 days2013: Good 191 of 214 days2013: Moderate 23 of 214 days2014: Good 169 of 214 days2014: Moderate 45 of 214 days2015: Good 168 of 215 days2015: Moderate 47 of 215 days20152016: Good 179 of 213 days2016: Moderate 34 of 213 days2017: Good 210 of 243 days2017: Moderate 33 of 243 days2018: Good 193 of 233 days2018: Moderate 40 of 233 days2019: Good 195 of 240 days2019: Moderate 45 of 240 days2020: Good 237 of 238 days2020: Moderate 1 of 238 days20202021: Good 237 of 242 days2021: Moderate 5 of 242 days2022: Good 223 of 244 days2022: Moderate 20 of 244 days2022: Unhealthy for Sensitive Groups 1 of 244 days2023: Good 202 of 242 days2023: Moderate 39 of 242 days2023: Unhealthy for Sensitive Groups 1 of 242 days2024: Good 206 of 244 days2024: Moderate 37 of 244 days2024: Unhealthy for Sensitive Groups 1 of 244 days2025: Good 222 of 238 days2025: Moderate 16 of 238 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 year0501001502001980: 90th percentile AQI 1661981: 90th percentile AQI 1001982: 90th percentile AQI 771983: 90th percentile AQI 1511984: 90th percentile AQI 1291985: 90th percentile AQI 1121986: 90th percentile AQI 1471987: 90th percentile AQI 1611988: 90th percentile AQI 1851989: 90th percentile AQI 1191990: 90th percentile AQI 1051991: 90th percentile AQI 971992: 90th percentile AQI 1151993: 90th percentile AQI 1501994: 90th percentile AQI 971995: 90th percentile AQI 1331996: 90th percentile AQI 1261997: 90th percentile AQI 1431998: 90th percentile AQI 1431999: 90th percentile AQI 1002000: 90th percentile AQI 1122001: 90th percentile AQI 1192002: 90th percentile AQI 1332003: 90th percentile AQI 1122004: 90th percentile AQI 1002005: 90th percentile AQI 1222006: 90th percentile AQI 1002007: 90th percentile AQI 1012008: 90th percentile AQI 902009: 90th percentile AQI 712010: 90th percentile AQI 802011: 90th percentile AQI 902012: 90th percentile AQI 712013: 90th percentile AQI 512014: 90th percentile AQI 612015: 90th percentile AQI 642016: 90th percentile AQI 612017: 90th percentile AQI 512018: 90th percentile AQI 612019: 90th percentile AQI 642020: 90th percentile AQI 462021: 90th percentile AQI 462022: 90th percentile AQI 502023: 90th percentile AQI 582024: 90th percentile AQI 612025: 90th percentile AQI 491980: Median AQI 1011981: Median AQI 481982: Median AQI 381983: Median AQI 581984: Median AQI 491985: Median AQI 491986: Median AQI 641987: Median AQI 841988: Median AQI 711989: Median AQI 491990: Median AQI 491991: Median AQI 501992: Median AQI 481993: Median AQI 771994: Median AQI 441995: Median AQI 581996: Median AQI 611997: Median AQI 581998: Median AQI 611999: Median AQI 442000: Median AQI 472001: Median AQI 542002: Median AQI 512003: Median AQI 482004: Median AQI 462005: Median AQI 582006: Median AQI 512007: Median AQI 582008: Median AQI 482009: Median AQI 432010: Median AQI 482011: Median AQI 492012: Median AQI 422013: Median AQI 382014: Median AQI 432015: Median AQI 442016: Median AQI 412017: Median AQI 432018: Median AQI 422019: Median AQI 442020: Median AQI 362021: Median AQI 382022: Median AQI 422023: Median AQI 432024: Median AQI 422025: Median AQI 391980198519901995200020052010201520202025
  • 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
Ozone238100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025238222160000394987Ozone
20242442063710004261101Ozone
20232422023910004358105Ozone
20222442232010004250112Ozone
202124223750000384667Ozone
202023823710000364651Ozone
2019240195450000446487Ozone
2018233193400000426193Ozone
2017243210330000435193Ozone
2016213179340000416197Ozone
2015215168470000446487Ozone
20142141694500004361100Ozone
2013214191230000385193Ozone
20122141664341004271154Ozone
20112121307831004990156Ozone
20102141228660004880136Ozone
20092141704130004371108Ozone
200821411980150004890150Ozone
2007214861012520058101166Ozone
2006210105881610051100177Ozone
200521390784230058122172Ozone
2004214131641900046100147Ozone
2003205116652040048112200Ozone
20022091016627141051133202Ozone
200121396763731054119203Ozone
2000214126522880047112169Ozone
1999208132581800044100147Ozone
1998213975744141061143206Ozone
19972361086844160058143197Ozone
19962341058038110061126192Ozone
1995238110685280058133179Ozone
199422614962141004497156Ozone
1993209765758171077150207Ozone
1992209114702140048115161Ozone
199120711081124005097156Ozone
1990203108712130049105166Ozone
1989209113632661049119203Ozone
19882007564331513071185219Ozone
1987204616645284084161216Ozone
1986204876533190064147200Ozone
1985186100592520049112166Ozone
1984191101552780049129179Ozone
1983201905535192058151205Ozone
19821461112771003877154Ozone
1981223129741910048100164Ozone
19801994652653330101166205Ozone

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 1980–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem