EnviroNearby

Hudson County, New Jersey air quality history

Daily Air Quality Index summaries from EPA monitors in Hudson, New Jersey, 1980–2025.

72%
Good days in 2025
41
Median daily AQI, 2025
3
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 Hudson, New Jersey on 365 days. 261 of those days (72%) were in the Good range, and the median daily AQI was 41. That median is about the same as the typical monitored county in New Jersey (median 40 across 15 counties), and about the same as the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 145 days. Across the years with fuller monitoring, the share of Good days rose: an average of 32% in 1980–1982 versus 68% 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 127 of 357 days1980: Moderate 182 of 357 days1980: Unhealthy for Sensitive Groups 26 of 357 days1980: Unhealthy 19 of 357 days1980: Very Unhealthy 3 of 357 days19801981: Good 128 of 365 days1981: Moderate 199 of 365 days1981: Unhealthy for Sensitive Groups 21 of 365 days1981: Unhealthy 14 of 365 days1981: Very Unhealthy 3 of 365 days1982: Good 95 of 361 days1982: Moderate 207 of 361 days1982: Unhealthy for Sensitive Groups 37 of 361 days1982: Unhealthy 21 of 361 days1982: Very Unhealthy 1 of 361 days1983: Good 117 of 364 days1983: Moderate 174 of 364 days1983: Unhealthy for Sensitive Groups 43 of 364 days1983: Unhealthy 20 of 364 days1983: Very Unhealthy 10 of 364 days1984: Good 103 of 366 days1984: Moderate 198 of 366 days1984: Unhealthy for Sensitive Groups 44 of 366 days1984: Unhealthy 18 of 366 days1984: Very Unhealthy 3 of 366 days1985: Good 101 of 365 days1985: Moderate 206 of 365 days1985: Unhealthy for Sensitive Groups 36 of 365 days1985: Unhealthy 16 of 365 days1985: Very Unhealthy 6 of 365 days19851986: Good 129 of 365 days1986: Moderate 196 of 365 days1986: Unhealthy for Sensitive Groups 30 of 365 days1986: Unhealthy 8 of 365 days1986: Very Unhealthy 2 of 365 days1987: Good 143 of 362 days1987: Moderate 167 of 362 days1987: Unhealthy for Sensitive Groups 29 of 362 days1987: Unhealthy 13 of 362 days1987: Very Unhealthy 10 of 362 days1988: Good 139 of 366 days1988: Moderate 172 of 366 days1988: Unhealthy for Sensitive Groups 25 of 366 days1988: Unhealthy 15 of 366 days1988: Very Unhealthy 15 of 366 days1989: Good 172 of 365 days1989: Moderate 152 of 365 days1989: Unhealthy for Sensitive Groups 27 of 365 days1989: Unhealthy 13 of 365 days1989: Very Unhealthy 1 of 365 days1990: Good 194 of 365 days1990: Moderate 140 of 365 days1990: Unhealthy for Sensitive Groups 16 of 365 days1990: Unhealthy 11 of 365 days1990: Very Unhealthy 4 of 365 days19901991: Good 180 of 365 days1991: Moderate 140 of 365 days1991: Unhealthy for Sensitive Groups 21 of 365 days1991: Unhealthy 18 of 365 days1991: Very Unhealthy 6 of 365 days1992: Good 192 of 366 days1992: Moderate 140 of 366 days1992: Unhealthy for Sensitive Groups 26 of 366 days1992: Unhealthy 7 of 366 days1992: Very Unhealthy 1 of 366 days1993: Good 187 of 365 days1993: Moderate 137 of 365 days1993: Unhealthy for Sensitive Groups 25 of 365 days1993: Unhealthy 13 of 365 days1993: Very Unhealthy 3 of 365 days1994: Good 187 of 365 days1994: Moderate 140 of 365 days1994: Unhealthy for Sensitive Groups 29 of 365 days1994: Unhealthy 9 of 365 days1995: Good 234 of 365 days1995: Moderate 100 of 365 days1995: Unhealthy for Sensitive Groups 17 of 365 days1995: Unhealthy 12 of 365 days1995: Very Unhealthy 2 of 365 days19951996: Good 228 of 365 days1996: Moderate 119 of 365 days1996: Unhealthy for Sensitive Groups 13 of 365 days1996: Unhealthy 5 of 365 days1997: Good 246 of 365 days1997: Moderate 95 of 365 days1997: Unhealthy for Sensitive Groups 15 of 365 days1997: Unhealthy 7 of 365 days1997: Very Unhealthy 2 of 365 days1998: Good 230 of 365 days1998: Moderate 109 of 365 days1998: Unhealthy for Sensitive Groups 20 of 365 days1998: Unhealthy 5 of 365 days1998: Very Unhealthy 1 of 365 days1999: Good 173 of 365 days1999: Moderate 156 of 365 days1999: Unhealthy for Sensitive Groups 21 of 365 days1999: Unhealthy 11 of 365 days1999: Very Unhealthy 4 of 365 days2000: Good 196 of 366 days2000: Moderate 152 of 366 days2000: Unhealthy for Sensitive Groups 14 of 366 days2000: Unhealthy 4 of 366 days20002001: Good 201 of 365 days2001: Moderate 138 of 365 days2001: Unhealthy for Sensitive Groups 20 of 365 days2001: Unhealthy 4 of 365 days2001: Very Unhealthy 2 of 365 days2002: Good 220 of 365 days2002: Moderate 115 of 365 days2002: Unhealthy for Sensitive Groups 23 of 365 days2002: Unhealthy 7 of 365 days2003: Good 222 of 364 days2003: Moderate 127 of 364 days2003: Unhealthy for Sensitive Groups 13 of 364 days2003: Unhealthy 2 of 364 days2004: Good 241 of 366 days2004: Moderate 115 of 366 days2004: Unhealthy for Sensitive Groups 9 of 366 days2004: Unhealthy 1 of 366 days2005: Good 225 of 365 days2005: Moderate 117 of 365 days2005: Unhealthy for Sensitive Groups 18 of 365 days2005: Unhealthy 5 of 365 days20052006: Good 155 of 364 days2006: Moderate 192 of 364 days2006: Unhealthy for Sensitive Groups 12 of 364 days2006: Unhealthy 5 of 364 days2007: Good 107 of 365 days2007: Moderate 234 of 365 days2007: Unhealthy for Sensitive Groups 17 of 365 days2007: Unhealthy 7 of 365 days2008: Good 81 of 366 days2008: Moderate 258 of 366 days2008: Unhealthy for Sensitive Groups 24 of 366 days2008: Unhealthy 3 of 366 days2009: Good 145 of 365 days2009: Moderate 215 of 365 days2009: Unhealthy for Sensitive Groups 5 of 365 days2010: Good 172 of 365 days2010: Moderate 180 of 365 days2010: Unhealthy for Sensitive Groups 12 of 365 days2010: Very Unhealthy 1 of 365 days20102011: Good 153 of 365 days2011: Moderate 199 of 365 days2011: Unhealthy for Sensitive Groups 12 of 365 days2011: Unhealthy 1 of 365 days2012: Good 174 of 366 days2012: Moderate 180 of 366 days2012: Unhealthy for Sensitive Groups 12 of 366 days2013: Good 198 of 365 days2013: Moderate 165 of 365 days2013: Unhealthy for Sensitive Groups 1 of 365 days2013: Unhealthy 1 of 365 days2014: Good 172 of 365 days2014: Moderate 187 of 365 days2014: Unhealthy for Sensitive Groups 6 of 365 days2015: Good 195 of 365 days2015: Moderate 153 of 365 days2015: Unhealthy for Sensitive Groups 16 of 365 days2015: Unhealthy 1 of 365 days20152016: Good 189 of 366 days2016: Moderate 175 of 366 days2016: Unhealthy for Sensitive Groups 2 of 366 days2017: Good 177 of 365 days2017: Moderate 185 of 365 days2017: Unhealthy for Sensitive Groups 3 of 365 days2018: Good 190 of 365 days2018: Moderate 166 of 365 days2018: Unhealthy for Sensitive Groups 7 of 365 days2018: Unhealthy 2 of 365 days2019: Good 211 of 365 days2019: Moderate 154 of 365 days2020: Good 259 of 366 days2020: Moderate 107 of 366 days20202021: Good 216 of 365 days2021: Moderate 146 of 365 days2021: Unhealthy for Sensitive Groups 3 of 365 days2022: Good 232 of 365 days2022: Moderate 131 of 365 days2022: Unhealthy for Sensitive Groups 2 of 365 days2023: Good 218 of 365 days2023: Moderate 142 of 365 days2023: Unhealthy for Sensitive Groups 1 of 365 days2023: Unhealthy 3 of 365 days2023: Very Unhealthy 1 of 365 days2024: Good 261 of 366 days2024: Moderate 102 of 366 days2024: Unhealthy for Sensitive Groups 2 of 366 days2024: Unhealthy 1 of 366 days2025: Good 261 of 365 days2025: Moderate 101 of 365 days2025: Unhealthy for Sensitive Groups 3 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 1191981: 90th percentile AQI 1031982: 90th percentile AQI 1121983: 90th percentile AQI 1361984: 90th percentile AQI 1151985: 90th percentile AQI 1261986: 90th percentile AQI 1021987: 90th percentile AQI 1151988: 90th percentile AQI 1331989: 90th percentile AQI 1031990: 90th percentile AQI 971991: 90th percentile AQI 1221992: 90th percentile AQI 991993: 90th percentile AQI 1061994: 90th percentile AQI 1011995: 90th percentile AQI 871996: 90th percentile AQI 771997: 90th percentile AQI 801998: 90th percentile AQI 871999: 90th percentile AQI 1002000: 90th percentile AQI 882001: 90th percentile AQI 912002: 90th percentile AQI 932003: 90th percentile AQI 772004: 90th percentile AQI 752005: 90th percentile AQI 842006: 90th percentile AQI 832007: 90th percentile AQI 942008: 90th percentile AQI 942009: 90th percentile AQI 772010: 90th percentile AQI 802011: 90th percentile AQI 762012: 90th percentile AQI 742013: 90th percentile AQI 692014: 90th percentile AQI 652015: 90th percentile AQI 802016: 90th percentile AQI 682017: 90th percentile AQI 662018: 90th percentile AQI 692019: 90th percentile AQI 642020: 90th percentile AQI 592021: 90th percentile AQI 642022: 90th percentile AQI 622023: 90th percentile AQI 642024: 90th percentile AQI 642025: 90th percentile AQI 591980: Median AQI 601981: Median AQI 611982: Median AQI 661983: Median AQI 641984: Median AQI 661985: Median AQI 651986: Median AQI 591987: Median AQI 571988: Median AQI 561989: Median AQI 511990: Median AQI 491991: Median AQI 511992: Median AQI 491993: Median AQI 501994: Median AQI 501995: Median AQI 441996: Median AQI 451997: Median AQI 441998: Median AQI 451999: Median AQI 512000: Median AQI 482001: Median AQI 472002: Median AQI 452003: Median AQI 452004: Median AQI 432005: Median AQI 442006: Median AQI 542007: Median AQI 582008: Median AQI 622009: Median AQI 542010: Median AQI 522011: Median AQI 532012: Median AQI 512013: Median AQI 472014: Median AQI 522015: Median AQI 472016: Median AQI 492017: Median AQI 512018: Median AQI 492019: Median AQI 472020: Median AQI 392021: Median AQI 442022: Median AQI 442023: Median AQI 442024: Median AQI 412025: Median AQI 411980198519901995200020052010201520202025
  • 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)14540%
Ozone11632%
Nitrogen dioxide (NO₂)10428%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
202536526110130004159133PM2.5
202436626110221004164151PM2.5
202336521814213104464203PM2.5
202236523213120004462115PM2.5
202136521614630004464126PM2.5
20203662591070000395990PM2.5
20193652111540000476493PM2.5
201836519016672004969174PM2.5
201736517718530005166115PM2.5
201636618917520004968119PM2.5
2015365195153161004780166PM2.5
201436517218760005265150PM2.5
201336519816511004769151PM2.5
2012366174180120005174126PM2.5
2011365153199121005376156PM2.5
2010365172180120105280206PM2.5
200936514521550005477112PM2.5
200836681258243006294161PM2.5
2007365107234177005894174PM2.5
2006364155192125005483169PM2.5
2005365225117185004484177NO2
200436624111591004375156NO2
2003364222127132004577192NO2
2002365220115237004593182NO2
2001365201138204204791212NO2
2000366196152144004888195NO2
199936517315621114051100227NO2
1998365230109205104587202NO2
199736524695157204480206NO2
1996365228119135004577179NO2
19953652341001712204487209NO2
19943651871402990050101197NO2
199336518713725133050106207CO
1992366192140267104999206CO
199136518014021186051122216NO2
19903651941401611404997244NO2
198936517215227131051103220CO
1988366139172251515056133245NO2
1987362143167291310057115260NO2
19863651291963082059102228NO2
198536510120636166065126249CO
198436610319844183066115205CO
1983364117174432010064136223CO
19823619520737211066112204CO
198136512819921143061103253CO
198035712718226193060119222CO

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 New Jersey with a similar median AQI in 2025

All monitored counties in New Jersey

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