EnviroNearby

Bergen County, New Jersey air quality history

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

71%
Good days in 2025
40
Median daily AQI, 2025
4
Days above 100 in 2025
363
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Bergen, New Jersey on 363 days. 258 of those days (71%) were in the Good range, and the median daily AQI was 40. 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 ozone on 148 days. Across the years with fuller monitoring, the share of Good days rose: an average of 56% in 1980–1982 versus 67% 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 195 of 358 days1980: Moderate 112 of 358 days1980: Unhealthy for Sensitive Groups 26 of 358 days1980: Unhealthy 14 of 358 days1980: Very Unhealthy 11 of 358 days19801981: Good 217 of 365 days1981: Moderate 121 of 365 days1981: Unhealthy for Sensitive Groups 19 of 365 days1981: Unhealthy 7 of 365 days1981: Very Unhealthy 1 of 365 days1982: Good 198 of 359 days1982: Moderate 118 of 359 days1982: Unhealthy for Sensitive Groups 27 of 359 days1982: Unhealthy 10 of 359 days1982: Very Unhealthy 6 of 359 days1983: Good 185 of 361 days1983: Moderate 120 of 361 days1983: Unhealthy for Sensitive Groups 35 of 361 days1983: Unhealthy 13 of 361 days1983: Very Unhealthy 8 of 361 days1984: Good 155 of 363 days1984: Moderate 166 of 363 days1984: Unhealthy for Sensitive Groups 35 of 363 days1984: Unhealthy 5 of 363 days1984: Very Unhealthy 2 of 363 days1985: Good 170 of 364 days1985: Moderate 140 of 364 days1985: Unhealthy for Sensitive Groups 39 of 364 days1985: Unhealthy 15 of 364 days19851986: Good 199 of 363 days1986: Moderate 138 of 363 days1986: Unhealthy for Sensitive Groups 15 of 363 days1986: Unhealthy 10 of 363 days1986: Very Unhealthy 1 of 363 days1987: Good 156 of 364 days1987: Moderate 164 of 364 days1987: Unhealthy for Sensitive Groups 22 of 364 days1987: Unhealthy 13 of 364 days1987: Very Unhealthy 9 of 364 days1988: Good 174 of 366 days1988: Moderate 143 of 366 days1988: Unhealthy for Sensitive Groups 23 of 366 days1988: Unhealthy 14 of 366 days1988: Very Unhealthy 12 of 366 days1989: Good 198 of 365 days1989: Moderate 138 of 365 days1989: Unhealthy for Sensitive Groups 20 of 365 days1989: Unhealthy 9 of 365 days1990: Good 214 of 364 days1990: Moderate 128 of 364 days1990: Unhealthy for Sensitive Groups 15 of 364 days1990: Unhealthy 6 of 364 days1990: Very Unhealthy 1 of 364 days19901991: Good 215 of 365 days1991: Moderate 122 of 365 days1991: Unhealthy for Sensitive Groups 17 of 365 days1991: Unhealthy 8 of 365 days1991: Very Unhealthy 3 of 365 days1992: Good 248 of 365 days1992: Moderate 106 of 365 days1992: Unhealthy for Sensitive Groups 10 of 365 days1992: Unhealthy 1 of 365 days1993: Good 242 of 365 days1993: Moderate 111 of 365 days1993: Unhealthy for Sensitive Groups 10 of 365 days1993: Unhealthy 2 of 365 days1994: Good 211 of 365 days1994: Moderate 134 of 365 days1994: Unhealthy for Sensitive Groups 15 of 365 days1994: Unhealthy 5 of 365 days1995: Good 254 of 365 days1995: Moderate 88 of 365 days1995: Unhealthy for Sensitive Groups 12 of 365 days1995: Unhealthy 10 of 365 days1995: Very Unhealthy 1 of 365 days19951996: Good 258 of 365 days1996: Moderate 97 of 365 days1996: Unhealthy for Sensitive Groups 8 of 365 days1996: Unhealthy 2 of 365 days1997: Good 251 of 365 days1997: Moderate 94 of 365 days1997: Unhealthy for Sensitive Groups 15 of 365 days1997: Unhealthy 3 of 365 days1997: Very Unhealthy 2 of 365 days1998: Good 305 of 365 days1998: Moderate 58 of 365 days1998: Unhealthy for Sensitive Groups 2 of 365 days1999: Good 292 of 365 days1999: Moderate 69 of 365 days1999: Unhealthy for Sensitive Groups 4 of 365 days2000: Good 264 of 366 days2000: Moderate 89 of 366 days2000: Unhealthy for Sensitive Groups 12 of 366 days2000: Unhealthy 1 of 366 days20002001: Good 253 of 365 days2001: Moderate 85 of 365 days2001: Unhealthy for Sensitive Groups 18 of 365 days2001: Unhealthy 6 of 365 days2001: Very Unhealthy 3 of 365 days2002: Good 228 of 365 days2002: Moderate 98 of 365 days2002: Unhealthy for Sensitive Groups 20 of 365 days2002: Unhealthy 18 of 365 days2002: Very Unhealthy 1 of 365 days2003: Good 248 of 365 days2003: Moderate 97 of 365 days2003: Unhealthy for Sensitive Groups 17 of 365 days2003: Unhealthy 3 of 365 days2004: Good 255 of 366 days2004: Moderate 99 of 366 days2004: Unhealthy for Sensitive Groups 10 of 366 days2004: Unhealthy 2 of 366 days2005: Good 227 of 365 days2005: Moderate 115 of 365 days2005: Unhealthy for Sensitive Groups 15 of 365 days2005: Unhealthy 8 of 365 days20052006: Good 106 of 365 days2006: Moderate 229 of 365 days2006: Unhealthy for Sensitive Groups 25 of 365 days2006: Unhealthy 5 of 365 days2007: Good 102 of 364 days2007: Moderate 240 of 364 days2007: Unhealthy for Sensitive Groups 22 of 364 days2008: Good 101 of 366 days2008: Moderate 248 of 366 days2008: Unhealthy for Sensitive Groups 15 of 366 days2008: Unhealthy 2 of 366 days2009: Good 129 of 365 days2009: Moderate 223 of 365 days2009: Unhealthy for Sensitive Groups 13 of 365 days2010: Good 268 of 365 days2010: Moderate 81 of 365 days2010: Unhealthy for Sensitive Groups 16 of 365 days20102011: Good 234 of 320 days2011: Moderate 73 of 320 days2011: Unhealthy for Sensitive Groups 10 of 320 days2011: Unhealthy 3 of 320 days2012: Good 188 of 251 days2012: Moderate 55 of 251 days2012: Unhealthy for Sensitive Groups 8 of 251 days2013: Good 209 of 283 days2013: Moderate 67 of 283 days2013: Unhealthy for Sensitive Groups 7 of 283 days2014: Good 248 of 318 days2014: Moderate 64 of 318 days2014: Unhealthy for Sensitive Groups 6 of 318 days2015: Good 144 of 365 days2015: Moderate 209 of 365 days2015: Unhealthy for Sensitive Groups 12 of 365 days20152016: Good 197 of 366 days2016: Moderate 159 of 366 days2016: Unhealthy for Sensitive Groups 9 of 366 days2016: Unhealthy 1 of 366 days2017: Good 209 of 365 days2017: Moderate 149 of 365 days2017: Unhealthy for Sensitive Groups 7 of 365 days2018: Good 153 of 365 days2018: Moderate 198 of 365 days2018: Unhealthy for Sensitive Groups 12 of 365 days2018: Unhealthy 2 of 365 days2019: Good 149 of 365 days2019: Moderate 211 of 365 days2019: Unhealthy for Sensitive Groups 5 of 365 days2020: Good 228 of 364 days2020: Moderate 133 of 364 days2020: Unhealthy for Sensitive Groups 3 of 364 days20202021: Good 230 of 365 days2021: Moderate 126 of 365 days2021: Unhealthy for Sensitive Groups 9 of 365 days2022: Good 259 of 365 days2022: Moderate 106 of 365 days2023: Good 204 of 365 days2023: Moderate 152 of 365 days2023: Unhealthy for Sensitive Groups 5 of 365 days2023: Unhealthy 4 of 365 days2024: Good 267 of 366 days2024: Moderate 89 of 366 days2024: Unhealthy for Sensitive Groups 9 of 366 days2024: Unhealthy 1 of 366 days2025: Good 258 of 363 days2025: Moderate 101 of 363 days2025: Unhealthy for Sensitive Groups 4 of 363 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 1221981: 90th percentile AQI 901982: 90th percentile AQI 1061983: 90th percentile AQI 1261984: 90th percentile AQI 1051985: 90th percentile AQI 1051986: 90th percentile AQI 871987: 90th percentile AQI 1051988: 90th percentile AQI 1221989: 90th percentile AQI 951990: 90th percentile AQI 841991: 90th percentile AQI 951992: 90th percentile AQI 701993: 90th percentile AQI 731994: 90th percentile AQI 841995: 90th percentile AQI 791996: 90th percentile AQI 681997: 90th percentile AQI 771998: 90th percentile AQI 561999: 90th percentile AQI 622000: 90th percentile AQI 772001: 90th percentile AQI 902002: 90th percentile AQI 1052003: 90th percentile AQI 772004: 90th percentile AQI 742005: 90th percentile AQI 852006: 90th percentile AQI 952007: 90th percentile AQI 902008: 90th percentile AQI 852009: 90th percentile AQI 892010: 90th percentile AQI 692011: 90th percentile AQI 712012: 90th percentile AQI 642013: 90th percentile AQI 672014: 90th percentile AQI 622015: 90th percentile AQI 772016: 90th percentile AQI 742017: 90th percentile AQI 652018: 90th percentile AQI 762019: 90th percentile AQI 732020: 90th percentile AQI 632021: 90th percentile AQI 652022: 90th percentile AQI 602023: 90th percentile AQI 692024: 90th percentile AQI 632025: 90th percentile AQI 611980: Median AQI 481981: Median AQI 451982: Median AQI 471983: Median AQI 501984: Median AQI 551985: Median AQI 551986: Median AQI 471987: Median AQI 551988: Median AQI 521989: Median AQI 491990: Median AQI 471991: Median AQI 471992: Median AQI 421993: Median AQI 431994: Median AQI 471995: Median AQI 431996: Median AQI 421997: Median AQI 441998: Median AQI 311999: Median AQI 262000: Median AQI 292001: Median AQI 402002: Median AQI 432003: Median AQI 422004: Median AQI 412005: Median AQI 452006: Median AQI 602007: Median AQI 602008: Median AQI 592009: Median AQI 562010: Median AQI 392011: Median AQI 392012: Median AQI 382013: Median AQI 392014: Median AQI 412015: Median AQI 542016: Median AQI 472017: Median AQI 452018: Median AQI 532019: Median AQI 532020: Median AQI 432021: Median AQI 432022: Median AQI 422023: Median AQI 482024: Median AQI 402025: Median AQI 401980198519901995200020052010201520202025
  • 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
Ozone14841%
Fine particles (PM2.5)13838%
Nitrogen dioxide (NO₂)7621%
Carbon monoxide (CO)1<1%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
202536325810140004061136Ozone
20243662678991004063156Ozone
202336520415254004869197PM2.5
20223652591060000426090PM2.5
202136523012690004365147PM2.5
202036422813330004363119PM2.5
201936514921150005373150PM2.5
2018365153198122005376164PM2.5
201736520914970004565140PM2.5
201636619715991004774151PM2.5
2015365144209120005477133PM2.5
20143182486460004162133Ozone
20132832096770003967119Ozone
20122511885580003864133Ozone
201132023473103003971174Ozone
201036526881160003969150Ozone
2009365129223130005689139PM2.5
2008366101248152005985159PM2.5
2007364102240220006090149PM2.5
2006365106229255006095172PM2.5
2005365227115158004585187NO2
200436625599102004174156NO2
200336524897173004277182NO2
20023652289820181043105209Ozone
200136525385186304090210Ozone
200036626489121002977159CO
19993652926940002662112CO
19983653055820003156143CO
199736525194153204477210NO2
19963652589782004268159NO2
1995365254881210104379206NO2
1994365211134155004784185NO2
1993365242111102004373159NO2
1992365248106101004270169NO2
1991365215122178304795205NO2
1990364214128156104784212NO2
1989365198138209004995200NO2
1988366174143231412052122259NO2
198736415616422139055105229NO2
19863631991381510104787212NO2
198536417014039150055105200NO2
19843631551663552055105227NO2
198336118512035138050126226NO2
198235919811827106047106237CO
1981365217121197104590207NO2
1980358195112261411048122218CO

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