EnviroNearby

Ramsey County, Minnesota air quality history

Daily Air Quality Index summaries from EPA monitors in Ramsey, Minnesota, 1980–2025.

70%
Good days in 2025
34
Median daily AQI, 2025
9
Days above 100 in 2025
365
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Ramsey, Minnesota on 365 days. 256 of those days (70%) were in the Good range, and the median daily AQI was 34. That median is lower than the typical monitored county in Minnesota (median 37 across 21 counties), and lower than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 329 days. Across the years with fuller monitoring, the share of Good days rose: an average of 48% in 1980–1982 versus 65% 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 159 of 366 days1980: Moderate 190 of 366 days1980: Unhealthy for Sensitive Groups 12 of 366 days1980: Unhealthy 5 of 366 days19801981: Good 208 of 365 days1981: Moderate 134 of 365 days1981: Unhealthy for Sensitive Groups 20 of 365 days1981: Unhealthy 3 of 365 days1982: Good 156 of 364 days1982: Moderate 181 of 364 days1982: Unhealthy for Sensitive Groups 23 of 364 days1982: Unhealthy 4 of 364 days1983: Good 136 of 365 days1983: Moderate 180 of 365 days1983: Unhealthy for Sensitive Groups 38 of 365 days1983: Unhealthy 11 of 365 days1984: Good 150 of 366 days1984: Moderate 199 of 366 days1984: Unhealthy for Sensitive Groups 14 of 366 days1984: Unhealthy 3 of 366 days1985: Good 170 of 365 days1985: Moderate 178 of 365 days1985: Unhealthy for Sensitive Groups 14 of 365 days1985: Unhealthy 1 of 365 days1985: Very Unhealthy 2 of 365 days19851986: Good 192 of 365 days1986: Moderate 163 of 365 days1986: Unhealthy for Sensitive Groups 10 of 365 days1987: Good 167 of 365 days1987: Moderate 186 of 365 days1987: Unhealthy for Sensitive Groups 8 of 365 days1987: Unhealthy 3 of 365 days1987: Very Unhealthy 1 of 365 days1988: Good 199 of 366 days1988: Moderate 166 of 366 days1988: Unhealthy 1 of 366 days1989: Good 208 of 365 days1989: Moderate 148 of 365 days1989: Unhealthy for Sensitive Groups 7 of 365 days1989: Unhealthy 2 of 365 days1990: Good 250 of 365 days1990: Moderate 112 of 365 days1990: Unhealthy for Sensitive Groups 2 of 365 days1990: Unhealthy 1 of 365 days19901991: Good 279 of 365 days1991: Moderate 83 of 365 days1991: Unhealthy for Sensitive Groups 1 of 365 days1991: Unhealthy 2 of 365 days1992: Good 308 of 366 days1992: Moderate 57 of 366 days1992: Unhealthy for Sensitive Groups 1 of 366 days1993: Good 305 of 365 days1993: Moderate 60 of 365 days1994: Good 274 of 365 days1994: Moderate 87 of 365 days1994: Unhealthy for Sensitive Groups 4 of 365 days1995: Good 309 of 365 days1995: Moderate 53 of 365 days1995: Unhealthy for Sensitive Groups 3 of 365 days19951996: Good 303 of 366 days1996: Moderate 63 of 366 days1997: Good 325 of 365 days1997: Moderate 40 of 365 days1998: Good 330 of 365 days1998: Moderate 35 of 365 days1999: Good 269 of 365 days1999: Moderate 94 of 365 days1999: Unhealthy for Sensitive Groups 2 of 365 days2000: Good 195 of 366 days2000: Moderate 163 of 366 days2000: Unhealthy for Sensitive Groups 8 of 366 days20002001: Good 127 of 365 days2001: Moderate 230 of 365 days2001: Unhealthy for Sensitive Groups 8 of 365 days2002: Good 129 of 365 days2002: Moderate 227 of 365 days2002: Unhealthy for Sensitive Groups 9 of 365 days2003: Good 123 of 365 days2003: Moderate 234 of 365 days2003: Unhealthy for Sensitive Groups 7 of 365 days2003: Unhealthy 1 of 365 days2004: Good 146 of 366 days2004: Moderate 213 of 366 days2004: Unhealthy for Sensitive Groups 7 of 366 days2005: Good 158 of 365 days2005: Moderate 202 of 365 days2005: Unhealthy for Sensitive Groups 3 of 365 days2005: Unhealthy 2 of 365 days20052006: Good 162 of 365 days2006: Moderate 202 of 365 days2006: Unhealthy for Sensitive Groups 1 of 365 days2007: Good 150 of 365 days2007: Moderate 211 of 365 days2007: Unhealthy for Sensitive Groups 4 of 365 days2008: Good 196 of 366 days2008: Moderate 166 of 366 days2008: Unhealthy for Sensitive Groups 4 of 366 days2009: Good 178 of 365 days2009: Moderate 182 of 365 days2009: Unhealthy for Sensitive Groups 5 of 365 days2010: Good 182 of 363 days2010: Moderate 175 of 363 days2010: Unhealthy for Sensitive Groups 6 of 363 days20102011: Good 178 of 365 days2011: Moderate 187 of 365 days2012: Good 206 of 366 days2012: Moderate 159 of 366 days2012: Unhealthy for Sensitive Groups 1 of 366 days2013: Good 212 of 365 days2013: Moderate 153 of 365 days2014: Good 192 of 365 days2014: Moderate 172 of 365 days2014: Unhealthy for Sensitive Groups 1 of 365 days2015: Good 215 of 365 days2015: Moderate 148 of 365 days2015: Unhealthy for Sensitive Groups 2 of 365 days20152016: Good 271 of 366 days2016: Moderate 93 of 366 days2016: Unhealthy for Sensitive Groups 1 of 366 days2016: Unhealthy 1 of 366 days2017: Good 246 of 365 days2017: Moderate 119 of 365 days2018: Good 217 of 365 days2018: Moderate 147 of 365 days2018: Unhealthy for Sensitive Groups 1 of 365 days2019: Good 246 of 365 days2019: Moderate 119 of 365 days2020: Good 252 of 366 days2020: Moderate 113 of 366 days2020: Unhealthy 1 of 366 days20202021: Good 252 of 365 days2021: Moderate 110 of 365 days2021: Unhealthy for Sensitive Groups 3 of 365 days2022: Good 267 of 365 days2022: Moderate 98 of 365 days2023: Good 188 of 365 days2023: Moderate 167 of 365 days2023: Unhealthy for Sensitive Groups 7 of 365 days2023: Unhealthy 3 of 365 days2024: Good 266 of 366 days2024: Moderate 99 of 366 days2024: Unhealthy for Sensitive Groups 1 of 366 days2025: Good 256 of 365 days2025: Moderate 100 of 365 days2025: Unhealthy for Sensitive Groups 5 of 365 days2025: Unhealthy 4 of 365 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 year0501001501980: 90th percentile AQI 851981: 90th percentile AQI 891982: 90th percentile AQI 931983: 90th percentile AQI 1081984: 90th percentile AQI 871985: 90th percentile AQI 851986: 90th percentile AQI 781987: 90th percentile AQI 751988: 90th percentile AQI 691989: 90th percentile AQI 671990: 90th percentile AQI 631991: 90th percentile AQI 601992: 90th percentile AQI 551993: 90th percentile AQI 561994: 90th percentile AQI 591995: 90th percentile AQI 541996: 90th percentile AQI 581997: 90th percentile AQI 521998: 90th percentile AQI 491999: 90th percentile AQI 642000: 90th percentile AQI 762001: 90th percentile AQI 772002: 90th percentile AQI 782003: 90th percentile AQI 772004: 90th percentile AQI 742005: 90th percentile AQI 752006: 90th percentile AQI 692007: 90th percentile AQI 712008: 90th percentile AQI 712009: 90th percentile AQI 712010: 90th percentile AQI 732011: 90th percentile AQI 692012: 90th percentile AQI 622013: 90th percentile AQI 642014: 90th percentile AQI 672015: 90th percentile AQI 612016: 90th percentile AQI 582017: 90th percentile AQI 592018: 90th percentile AQI 642019: 90th percentile AQI 632020: 90th percentile AQI 582021: 90th percentile AQI 652022: 90th percentile AQI 572023: 90th percentile AQI 712024: 90th percentile AQI 582025: 90th percentile AQI 611980: Median AQI 541981: Median AQI 471982: Median AQI 541983: Median AQI 591984: Median AQI 551985: Median AQI 521986: Median AQI 501987: Median AQI 521988: Median AQI 491989: Median AQI 491990: Median AQI 441991: Median AQI 421992: Median AQI 381993: Median AQI 381994: Median AQI 401995: Median AQI 361996: Median AQI 381997: Median AQI 341998: Median AQI 341999: Median AQI 372000: Median AQI 472001: Median AQI 552002: Median AQI 552003: Median AQI 552004: Median AQI 532005: Median AQI 532006: Median AQI 522007: Median AQI 532008: Median AQI 472009: Median AQI 512010: Median AQI 502011: Median AQI 512012: Median AQI 462013: Median AQI 412014: Median AQI 482015: Median AQI 442016: Median AQI 382017: Median AQI 412018: Median AQI 442019: Median AQI 392020: Median AQI 402021: Median AQI 392022: Median AQI 362023: Median AQI 492024: Median AQI 362025: Median AQI 341980198519901995200020052010201520202025
  • 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)32990%
Coarse particles (PM10)3610%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
202536525610054003461170PM2.5
20243662669910003658128PM2.5
202336518816773004971190PM2.5
2022365267980000365785PM2.5
202136525211030003965148PM2.5
202036625211301004058163PM2.5
20193652461190000396391PM2.5
201836521714710004464111PM2.5
20173652461190000415990PM2.5
20163662719311003858151PM2.5
201536521514820004461134PM2.5
201436519217210004867124PM2.5
20133652121530000416499PM2.5
201236620615910004662102PM2.5
20113651781870000516996PM2.5
201036318217560005073125PM2.5
200936517818250005171135PM2.5
200836619616640004771137PM2.5
200736515021140005371146PM2.5
200636516220210005269126PM2.5
200536515820232005375163PM2.5
200436614621370005374129PM2.5
200336512323471005577151PM2.5
200236512922790005578132PM2.5
200136512723080005577134PM2.5
200036619516380004776143PM2.5
19993652699420003764116NO2
1998365330350000344980NO2
1997365325400000345287NO2
1996366303630000385897NO2
19953653095330003654140NO2
19943652748740004059118CO
1993365305600000385692CO
19923663085710003855102CO
19913652798312004260197CO
199036525011221004463157CO
198936520814872004967170CO
198836619916601004969181CO
198736516718683105275204CO
1986365192163100005078142CO
1985365170178141205285232CO
1984366150199143005587173CO
198336513618038110059108197CO
1982364156181234005493192CO
1981365208134203004789190CO
1980366159190125005485170CO

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 Minnesota with a similar median AQI in 2025

All monitored counties in Minnesota

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