EnviroNearby

Kent County, Rhode Island air quality history

Daily Air Quality Index summaries from EPA monitors in Kent, Rhode Island, 1980–2025.

93%
Good days in 2025
31
Median daily AQI, 2025
0
Days above 100 in 2025
362
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Kent, Rhode Island on 362 days. 336 of those days (93%) were in the Good range, and the median daily AQI was 31. That median is lower than the typical monitored county in Rhode Island (median 37 across 3 counties), and lower than the typical monitored U.S. county (40). The main pollutant was ozone on 183 days. Across the years with fuller monitoring, the share of Good days rose: an average of 72% in 1980–1982 versus 89% 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%1980: Good 208 of 330 days1980: Moderate 69 of 330 days1980: Unhealthy for Sensitive Groups 24 of 330 days1980: Unhealthy 18 of 330 days1980: Very Unhealthy 11 of 330 days19801981: Good 259 of 346 days1981: Moderate 49 of 346 days1981: Unhealthy for Sensitive Groups 16 of 346 days1981: Unhealthy 12 of 346 days1981: Very Unhealthy 10 of 346 days1982: Good 255 of 332 days1982: Moderate 49 of 332 days1982: Unhealthy for Sensitive Groups 15 of 332 days1982: Unhealthy 7 of 332 days1982: Very Unhealthy 6 of 332 days1983: Good 269 of 338 days1983: Moderate 38 of 338 days1983: Unhealthy for Sensitive Groups 15 of 338 days1983: Unhealthy 9 of 338 days1983: Very Unhealthy 7 of 338 days1984: Good 198 of 300 days1984: Moderate 51 of 300 days1984: Unhealthy for Sensitive Groups 24 of 300 days1984: Unhealthy 15 of 300 days1984: Very Unhealthy 12 of 300 days1985: Good 75 of 129 days1985: Moderate 23 of 129 days1985: Unhealthy for Sensitive Groups 18 of 129 days1985: Unhealthy 8 of 129 days1985: Very Unhealthy 5 of 129 days19851986: Good 124 of 187 days1986: Moderate 35 of 187 days1986: Unhealthy for Sensitive Groups 17 of 187 days1986: Unhealthy 8 of 187 days1986: Very Unhealthy 3 of 187 days1987: Good 109 of 184 days1987: Moderate 42 of 184 days1987: Unhealthy for Sensitive Groups 17 of 184 days1987: Unhealthy 11 of 184 days1987: Very Unhealthy 5 of 184 days1988: Good 115 of 176 days1988: Moderate 24 of 176 days1988: Unhealthy for Sensitive Groups 20 of 176 days1988: Unhealthy 12 of 176 days1988: Very Unhealthy 5 of 176 days1989: Good 95 of 162 days1989: Moderate 48 of 162 days1989: Unhealthy for Sensitive Groups 12 of 162 days1989: Unhealthy 6 of 162 days1989: Very Unhealthy 1 of 162 days1990: Good 149 of 214 days1990: Moderate 41 of 214 days1990: Unhealthy for Sensitive Groups 11 of 214 days1990: Unhealthy 9 of 214 days1990: Very Unhealthy 4 of 214 days19901991: Good 134 of 203 days1991: Moderate 38 of 203 days1991: Unhealthy for Sensitive Groups 11 of 203 days1991: Unhealthy 13 of 203 days1991: Very Unhealthy 7 of 203 days1992: Good 170 of 214 days1992: Moderate 26 of 214 days1992: Unhealthy for Sensitive Groups 15 of 214 days1992: Unhealthy 3 of 214 days1993: Good 144 of 180 days1993: Moderate 24 of 180 days1993: Unhealthy for Sensitive Groups 6 of 180 days1993: Unhealthy 5 of 180 days1993: Very Unhealthy 1 of 180 days1994: Good 155 of 207 days1994: Moderate 26 of 207 days1994: Unhealthy for Sensitive Groups 19 of 207 days1994: Unhealthy 5 of 207 days1994: Very Unhealthy 2 of 207 days1995: Good 187 of 230 days1995: Moderate 24 of 230 days1995: Unhealthy for Sensitive Groups 10 of 230 days1995: Unhealthy 5 of 230 days1995: Very Unhealthy 4 of 230 days19951996: Good 186 of 236 days1996: Moderate 38 of 236 days1996: Unhealthy for Sensitive Groups 9 of 236 days1996: Unhealthy 3 of 236 days1997: Good 160 of 203 days1997: Moderate 26 of 203 days1997: Unhealthy for Sensitive Groups 7 of 203 days1997: Unhealthy 9 of 203 days1997: Very Unhealthy 1 of 203 days1998: Good 177 of 225 days1998: Moderate 31 of 225 days1998: Unhealthy for Sensitive Groups 13 of 225 days1998: Unhealthy 4 of 225 days1999: Good 155 of 208 days1999: Moderate 33 of 208 days1999: Unhealthy for Sensitive Groups 13 of 208 days1999: Unhealthy 6 of 208 days1999: Very Unhealthy 1 of 208 days2000: Good 161 of 232 days2000: Moderate 56 of 232 days2000: Unhealthy for Sensitive Groups 10 of 232 days2000: Unhealthy 5 of 232 days20002001: Good 140 of 230 days2001: Moderate 65 of 230 days2001: Unhealthy for Sensitive Groups 14 of 230 days2001: Unhealthy 8 of 230 days2001: Very Unhealthy 3 of 230 days2002: Good 147 of 234 days2002: Moderate 59 of 234 days2002: Unhealthy for Sensitive Groups 15 of 234 days2002: Unhealthy 11 of 234 days2002: Very Unhealthy 2 of 234 days2003: Good 171 of 228 days2003: Moderate 45 of 228 days2003: Unhealthy for Sensitive Groups 11 of 228 days2003: Unhealthy 1 of 228 days2004: Good 182 of 232 days2004: Moderate 40 of 232 days2004: Unhealthy for Sensitive Groups 8 of 232 days2004: Unhealthy 2 of 232 days2005: Good 158 of 223 days2005: Moderate 49 of 223 days2005: Unhealthy for Sensitive Groups 11 of 223 days2005: Unhealthy 5 of 223 days20052006: Good 191 of 243 days2006: Moderate 42 of 243 days2006: Unhealthy for Sensitive Groups 9 of 243 days2006: Unhealthy 1 of 243 days2007: Good 164 of 238 days2007: Moderate 56 of 238 days2007: Unhealthy for Sensitive Groups 13 of 238 days2007: Unhealthy 5 of 238 days2008: Good 194 of 251 days2008: Moderate 50 of 251 days2008: Unhealthy for Sensitive Groups 6 of 251 days2008: Unhealthy 1 of 251 days2009: Good 256 of 321 days2009: Moderate 62 of 321 days2009: Unhealthy for Sensitive Groups 3 of 321 days2010: Good 278 of 356 days2010: Moderate 72 of 356 days2010: Unhealthy for Sensitive Groups 6 of 356 days20102011: Good 250 of 349 days2011: Moderate 92 of 349 days2011: Unhealthy for Sensitive Groups 7 of 349 days2012: Good 286 of 363 days2012: Moderate 70 of 363 days2012: Unhealthy for Sensitive Groups 7 of 363 days2013: Good 291 of 362 days2013: Moderate 65 of 362 days2013: Unhealthy for Sensitive Groups 6 of 362 days2014: Good 325 of 365 days2014: Moderate 40 of 365 days2015: Good 282 of 357 days2015: Moderate 72 of 357 days2015: Unhealthy for Sensitive Groups 2 of 357 days2015: Unhealthy 1 of 357 days20152016: Good 307 of 354 days2016: Moderate 42 of 354 days2016: Unhealthy for Sensitive Groups 5 of 354 days2017: Good 316 of 349 days2017: Moderate 28 of 349 days2017: Unhealthy for Sensitive Groups 5 of 349 days2018: Good 294 of 354 days2018: Moderate 54 of 354 days2018: Unhealthy for Sensitive Groups 6 of 354 days2019: Good 325 of 351 days2019: Moderate 26 of 351 days2020: Good 326 of 358 days2020: Moderate 31 of 358 days2020: Unhealthy for Sensitive Groups 1 of 358 days20202021: Good 313 of 358 days2021: Moderate 42 of 358 days2021: Unhealthy for Sensitive Groups 3 of 358 days2022: Good 334 of 358 days2022: Moderate 24 of 358 days2023: Good 287 of 357 days2023: Moderate 66 of 357 days2023: Unhealthy for Sensitive Groups 4 of 357 days2024: Good 332 of 357 days2024: Moderate 25 of 357 days2025: Good 336 of 362 days2025: Moderate 26 of 362 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 1431981: 90th percentile AQI 1081982: 90th percentile AQI 931983: 90th percentile AQI 901984: 90th percentile AQI 1431985: 90th percentile AQI 1511986: 90th percentile AQI 1261987: 90th percentile AQI 1431988: 90th percentile AQI 1471989: 90th percentile AQI 1081990: 90th percentile AQI 1051991: 90th percentile AQI 1471992: 90th percentile AQI 871993: 90th percentile AQI 841994: 90th percentile AQI 1151995: 90th percentile AQI 931996: 90th percentile AQI 801997: 90th percentile AQI 901998: 90th percentile AQI 841999: 90th percentile AQI 972000: 90th percentile AQI 742001: 90th percentile AQI 1082002: 90th percentile AQI 1192003: 90th percentile AQI 712004: 90th percentile AQI 772005: 90th percentile AQI 872006: 90th percentile AQI 672007: 90th percentile AQI 902008: 90th percentile AQI 672009: 90th percentile AQI 592010: 90th percentile AQI 642011: 90th percentile AQI 622012: 90th percentile AQI 582013: 90th percentile AQI 572014: 90th percentile AQI 512015: 90th percentile AQI 572016: 90th percentile AQI 542017: 90th percentile AQI 502018: 90th percentile AQI 562019: 90th percentile AQI 492020: 90th percentile AQI 492021: 90th percentile AQI 542022: 90th percentile AQI 472023: 90th percentile AQI 552024: 90th percentile AQI 472025: 90th percentile AQI 461980: Median AQI 441981: Median AQI 381982: Median AQI 361983: Median AQI 331984: Median AQI 421985: Median AQI 481986: Median AQI 451987: Median AQI 461988: Median AQI 451989: Median AQI 471990: Median AQI 431991: Median AQI 441992: Median AQI 381993: Median AQI 401994: Median AQI 391995: Median AQI 391996: Median AQI 381997: Median AQI 401998: Median AQI 401999: Median AQI 392000: Median AQI 422001: Median AQI 462002: Median AQI 422003: Median AQI 402004: Median AQI 392005: Median AQI 432006: Median AQI 382007: Median AQI 402008: Median AQI 392009: Median AQI 352010: Median AQI 382011: Median AQI 432012: Median AQI 392013: Median AQI 402014: Median AQI 372015: Median AQI 402016: Median AQI 352017: Median AQI 322018: Median AQI 362019: Median AQI 342020: Median AQI 342021: Median AQI 342022: Median AQI 312023: Median AQI 402024: Median AQI 312025: Median AQI 311980198519901995200020052010201520202025
  • 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
Ozone18351%
Fine particles (PM2.5)17949%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025362336260000314690Ozone
2024357332250000314797PM2.5
20233572876640004055126PM2.5
20223583342400003147100Ozone
20213583134230003454140PM2.5
20203583263110003449133PM2.5
2019351325260000344993Ozone
20183542945460003656140PM2.5
20173493162850003250133PM2.5
20163543074250003554147Ozone
20153572827221004057166Ozone
2014365325400000375197Ozone
20133622916560004057143PM2.5
20123632867070003958140PM2.5
20113492509270004362147Ozone
20103562787260003864136PM2.5
20093212566230003559112PM2.5
20082511945061003967151Ozone
200723816456135004090166Ozone
20062431914291003867164Ozone
200522315849115004387182Ozone
20042321824082003977195Ozone
200322817145111004071200Ozone
20022341475915112042119216Ozone
2001230140651483046108214Ozone
200023216156105004274182Ozone
199920815533136103997208Ozone
199822517731134004084179Ozone
19972031602679104090201Ozone
19962361863893003880190Ozone
199523018724105403993236Ozone
1994207155261952039115219Ozone
19931801442465104084202Ozone
199221417026153003887200Ozone
19912031343811137044147241Ozone
1990214149411194043105226Ozone
198916295481261047108219Ozone
19881761152420125045147266Ozone
19871841094217115046143233Ozone
1986187124351783045126230Ozone
198512975231885048151213Ozone
198430019851241512042143281Ozone
198333826938159703390225Ozone
198233225549157603693229Ozone
198134625949161210038108245Ozone
198033020869241811044143272Ozone

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 Rhode Island with a similar median AQI in 2025

All monitored counties in Rhode Island

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