EnviroNearby

Dodge County, Wisconsin air quality history

Daily Air Quality Index summaries from EPA monitors in Dodge, Wisconsin, 1982–2025.

72%
Good days in 2025
40
Median daily AQI, 2025
7
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 Dodge, Wisconsin on 365 days. 264 of those days (72%) were in the Good range, and the median daily AQI was 40. That median is about the same as the typical monitored county in Wisconsin (median 38 across 29 counties), and about the same as the typical monitored U.S. county (40). The main pollutant was ozone on 226 days. Across the years with fuller monitoring, the share of Good days held roughly steady: an average of 69% in 1983–1985 versus 71% in 2023–2025.

Years with fewer than 120 monitored days (1982) 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%1982: Good 53 of 83 days1982: Moderate 28 of 83 days1982: Unhealthy for Sensitive Groups 1 of 83 days1982: Unhealthy 1 of 83 days19821983: Good 127 of 197 days1983: Moderate 44 of 197 days1983: Unhealthy for Sensitive Groups 19 of 197 days1983: Unhealthy 7 of 197 days1984: Good 118 of 162 days1984: Moderate 32 of 162 days1984: Unhealthy for Sensitive Groups 11 of 162 days1984: Unhealthy 1 of 162 days1985: Good 113 of 164 days1985: Moderate 36 of 164 days1985: Unhealthy for Sensitive Groups 12 of 164 days1985: Unhealthy 3 of 164 days1986: Good 133 of 177 days1986: Moderate 34 of 177 days1986: Unhealthy for Sensitive Groups 10 of 177 days1987: Good 114 of 183 days1987: Moderate 43 of 183 days1987: Unhealthy for Sensitive Groups 19 of 183 days1987: Unhealthy 6 of 183 days1987: Very Unhealthy 1 of 183 days19871988: Good 113 of 184 days1988: Moderate 40 of 184 days1988: Unhealthy for Sensitive Groups 24 of 184 days1988: Unhealthy 7 of 184 days1989: Good 119 of 181 days1989: Moderate 45 of 181 days1989: Unhealthy for Sensitive Groups 14 of 181 days1989: Unhealthy 3 of 181 days1990: Good 146 of 178 days1990: Moderate 28 of 178 days1990: Unhealthy for Sensitive Groups 4 of 178 days1991: Good 141 of 181 days1991: Moderate 29 of 181 days1991: Unhealthy for Sensitive Groups 10 of 181 days1991: Unhealthy 1 of 181 days1992: Good 137 of 180 days1992: Moderate 29 of 180 days1992: Unhealthy for Sensitive Groups 12 of 180 days1992: Unhealthy 2 of 180 days19921993: Good 172 of 182 days1993: Moderate 9 of 182 days1993: Unhealthy for Sensitive Groups 1 of 182 days1994: Good 158 of 180 days1994: Moderate 18 of 180 days1994: Unhealthy for Sensitive Groups 4 of 180 days1995: Good 145 of 181 days1995: Moderate 26 of 181 days1995: Unhealthy for Sensitive Groups 9 of 181 days1995: Unhealthy 1 of 181 days1996: Good 147 of 178 days1996: Moderate 22 of 178 days1996: Unhealthy for Sensitive Groups 7 of 178 days1996: Unhealthy 2 of 178 days1997: Good 138 of 179 days1997: Moderate 34 of 179 days1997: Unhealthy for Sensitive Groups 6 of 179 days1997: Unhealthy 1 of 179 days19971998: Good 114 of 184 days1998: Moderate 59 of 184 days1998: Unhealthy for Sensitive Groups 10 of 184 days1998: Unhealthy 1 of 184 days1999: Good 128 of 223 days1999: Moderate 77 of 223 days1999: Unhealthy for Sensitive Groups 13 of 223 days1999: Unhealthy 5 of 223 days2000: Good 246 of 344 days2000: Moderate 92 of 344 days2000: Unhealthy for Sensitive Groups 5 of 344 days2000: Unhealthy 1 of 344 days2001: Good 255 of 358 days2001: Moderate 90 of 358 days2001: Unhealthy for Sensitive Groups 11 of 358 days2001: Unhealthy 2 of 358 days2002: Good 215 of 359 days2002: Moderate 128 of 359 days2002: Unhealthy for Sensitive Groups 14 of 359 days2002: Unhealthy 2 of 359 days20022003: Good 195 of 365 days2003: Moderate 149 of 365 days2003: Unhealthy for Sensitive Groups 21 of 365 days2004: Good 196 of 365 days2004: Moderate 161 of 365 days2004: Unhealthy for Sensitive Groups 8 of 365 days2005: Good 173 of 365 days2005: Moderate 169 of 365 days2005: Unhealthy for Sensitive Groups 21 of 365 days2005: Unhealthy 2 of 365 days2006: Good 263 of 365 days2006: Moderate 97 of 365 days2006: Unhealthy for Sensitive Groups 5 of 365 days2007: Good 251 of 365 days2007: Moderate 103 of 365 days2007: Unhealthy for Sensitive Groups 11 of 365 days20072008: Good 269 of 366 days2008: Moderate 96 of 366 days2008: Unhealthy for Sensitive Groups 1 of 366 days2009: Good 277 of 354 days2009: Moderate 76 of 354 days2009: Unhealthy for Sensitive Groups 1 of 354 days2010: Good 207 of 351 days2010: Moderate 141 of 351 days2010: Unhealthy for Sensitive Groups 3 of 351 days2011: Good 196 of 365 days2011: Moderate 163 of 365 days2011: Unhealthy for Sensitive Groups 6 of 365 days2012: Good 193 of 366 days2012: Moderate 160 of 366 days2012: Unhealthy for Sensitive Groups 12 of 366 days2012: Unhealthy 1 of 366 days20122013: Good 209 of 365 days2013: Moderate 154 of 365 days2013: Unhealthy for Sensitive Groups 1 of 365 days2013: Very Unhealthy 1 of 365 days2014: Good 236 of 365 days2014: Moderate 124 of 365 days2014: Unhealthy for Sensitive Groups 5 of 365 days2015: Good 273 of 365 days2015: Moderate 91 of 365 days2015: Unhealthy for Sensitive Groups 1 of 365 days2016: Good 280 of 366 days2016: Moderate 83 of 366 days2016: Unhealthy for Sensitive Groups 3 of 366 days2017: Good 292 of 365 days2017: Moderate 72 of 365 days2017: Unhealthy for Sensitive Groups 1 of 365 days20172018: Good 250 of 365 days2018: Moderate 112 of 365 days2018: Unhealthy for Sensitive Groups 3 of 365 days2019: Good 257 of 365 days2019: Moderate 107 of 365 days2019: Unhealthy for Sensitive Groups 1 of 365 days2020: Good 247 of 366 days2020: Moderate 117 of 366 days2020: Unhealthy for Sensitive Groups 2 of 366 days2021: Good 216 of 365 days2021: Moderate 149 of 365 days2022: Good 266 of 365 days2022: Moderate 99 of 365 days20222023: Good 213 of 365 days2023: Moderate 133 of 365 days2023: Unhealthy for Sensitive Groups 14 of 365 days2023: Unhealthy 2 of 365 days2023: Very Unhealthy 3 of 365 days2024: Good 297 of 366 days2024: Moderate 69 of 366 days2025: Good 264 of 365 days2025: Moderate 94 of 365 days2025: Unhealthy for Sensitive Groups 6 of 365 days2025: Unhealthy 1 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 year0501001501982: 90th percentile AQI 901983: 90th percentile AQI 1121984: 90th percentile AQI 871985: 90th percentile AQI 971986: 90th percentile AQI 931987: 90th percentile AQI 1121988: 90th percentile AQI 1261989: 90th percentile AQI 971990: 90th percentile AQI 711991: 90th percentile AQI 801992: 90th percentile AQI 901993: 90th percentile AQI 481994: 90th percentile AQI 541995: 90th percentile AQI 801996: 90th percentile AQI 711997: 90th percentile AQI 771998: 90th percentile AQI 871999: 90th percentile AQI 932000: 90th percentile AQI 712001: 90th percentile AQI 772002: 90th percentile AQI 842003: 90th percentile AQI 862004: 90th percentile AQI 742005: 90th percentile AQI 912006: 90th percentile AQI 682007: 90th percentile AQI 742008: 90th percentile AQI 662009: 90th percentile AQI 662010: 90th percentile AQI 682011: 90th percentile AQI 712012: 90th percentile AQI 792013: 90th percentile AQI 672014: 90th percentile AQI 642015: 90th percentile AQI 602016: 90th percentile AQI 612017: 90th percentile AQI 582018: 90th percentile AQI 682019: 90th percentile AQI 612020: 90th percentile AQI 612021: 90th percentile AQI 682022: 90th percentile AQI 602023: 90th percentile AQI 772024: 90th percentile AQI 542025: 90th percentile AQI 631982: Median AQI 411983: Median AQI 431984: Median AQI 421985: Median AQI 431986: Median AQI 411987: Median AQI 431988: Median AQI 441989: Median AQI 461990: Median AQI 411991: Median AQI 401992: Median AQI 391993: Median AQI 331994: Median AQI 381995: Median AQI 391996: Median AQI 411997: Median AQI 411998: Median AQI 461999: Median AQI 482000: Median AQI 412001: Median AQI 412002: Median AQI 432003: Median AQI 492004: Median AQI 462005: Median AQI 522006: Median AQI 422007: Median AQI 392008: Median AQI 402009: Median AQI 362010: Median AQI 462011: Median AQI 472012: Median AQI 492013: Median AQI 472014: Median AQI 432015: Median AQI 412016: Median AQI 382017: Median AQI 392018: Median AQI 442019: Median AQI 422020: Median AQI 422021: Median AQI 462022: Median AQI 422023: Median AQI 462024: Median AQI 382025: Median AQI 401982198719921997200220072012201720222025
  • 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
Ozone22662%
Fine particles (PM2.5)13838%
Coarse particles (PM10)1<1%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
20253652649461004063171Ozone
2024366297690000385484Ozone
2023365213133142304677210PM2.5
2022365266990000426093Ozone
20213652161490000466899PM2.5
202036624711720004261136PM2.5
201936525710710004261122Ozone
201836525011230004468133Ozone
20173652927210003958122Ozone
20163662808330003861148Ozone
20153652739110004160101Ozone
201436523612450004364108Ozone
201336520915410104767214PM2.5
2012366193160121004979179Ozone
201136519616360004771115PM2.5
201035120714130004668125PM2.5
20093542777610003666107Ozone
20083662699610004066119Ozone
2007365251103110003974136Ozone
20063652639750004268138Ozone
2005365173169212005291161PM2.5
200436519616180004674129PM2.5
2003365195149210004986150Ozone
2002359215128142004384166Ozone
200135825590112004177159Ozone
20003442469251004171154Ozone
199922312877135004893172Ozone
199818411459101004687159Ozone
19971791383461004177154Ozone
19961781472272004171177Ozone
19951811452691003980156Ozone
19941801581840003854115Ozone
1993182172910003348108Ozone
199218013729122003990172Ozone
199118114129101004080154Ozone
19901781462840004171143Ozone
198918111945143004697185Ozone
1988184113402470044126185Ozone
1987183114431961043112203Ozone
198617713334100004193140Ozone
198516411336123004397166Ozone
198416211832111004287159Ozone
1983197127441970043112187Ozone
198283532811004190151Ozone

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 Wisconsin with a similar median AQI in 2025

All monitored counties in Wisconsin

Source: U.S. EPA AirData, “Annual AQI by County” files for 1982–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem