EnviroNearby

Kings County, California air quality history

Daily Air Quality Index summaries from EPA monitors in Kings, California, 1980–2025.

35%
Good days in 2025
57
Median daily AQI, 2025
11
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 Kings, California on 365 days. 126 of those days (35%) were in the Good range, and the median daily AQI was 57. That median is higher than the typical monitored county in California (median 45.5 across 46 counties), and higher than the typical monitored U.S. county (40). The main pollutant was fine particles (PM2.5) on 182 days. Across the years with fuller monitoring, the share of Good days fell: an average of 75% in 1980–1982 versus 32% 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 275 of 359 days1980: Moderate 59 of 359 days1980: Unhealthy for Sensitive Groups 21 of 359 days1980: Unhealthy 4 of 359 days19801981: Good 259 of 318 days1981: Moderate 55 of 318 days1981: Unhealthy for Sensitive Groups 4 of 318 days1982: Good 172 of 255 days1982: Moderate 51 of 255 days1982: Unhealthy for Sensitive Groups 26 of 255 days1982: Unhealthy 6 of 255 days1983: Good 165 of 312 days1983: Moderate 85 of 312 days1983: Unhealthy for Sensitive Groups 50 of 312 days1983: Unhealthy 12 of 312 days1984: Good 215 of 346 days1984: Moderate 65 of 346 days1984: Unhealthy for Sensitive Groups 49 of 346 days1984: Unhealthy 17 of 346 days1985: Good 181 of 299 days1985: Moderate 72 of 299 days1985: Unhealthy for Sensitive Groups 35 of 299 days1985: Unhealthy 11 of 299 days19851986: Good 135 of 183 days1986: Moderate 38 of 183 days1986: Unhealthy for Sensitive Groups 9 of 183 days1986: Unhealthy 1 of 183 days1987: Good 135 of 224 days1987: Moderate 50 of 224 days1987: Unhealthy for Sensitive Groups 25 of 224 days1987: Unhealthy 14 of 224 days1988: Good 176 of 359 days1988: Moderate 81 of 359 days1988: Unhealthy for Sensitive Groups 80 of 359 days1988: Unhealthy 21 of 359 days1988: Very Unhealthy 1 of 359 days1989: Good 181 of 361 days1989: Moderate 119 of 361 days1989: Unhealthy for Sensitive Groups 52 of 361 days1989: Unhealthy 8 of 361 days1989: Very Unhealthy 1 of 361 days1990: Good 213 of 356 days1990: Moderate 110 of 356 days1990: Unhealthy for Sensitive Groups 28 of 356 days1990: Unhealthy 4 of 356 days1990: Hazardous 1 of 356 days19901991: Good 197 of 360 days1991: Moderate 119 of 360 days1991: Unhealthy for Sensitive Groups 36 of 360 days1991: Unhealthy 8 of 360 days1992: Good 241 of 349 days1992: Moderate 99 of 349 days1992: Unhealthy for Sensitive Groups 9 of 349 days1993: Good 155 of 235 days1993: Moderate 59 of 235 days1993: Unhealthy for Sensitive Groups 19 of 235 days1993: Unhealthy 2 of 235 days1994: Good 197 of 363 days1994: Moderate 97 of 363 days1994: Unhealthy for Sensitive Groups 59 of 363 days1994: Unhealthy 10 of 363 days1995: Good 212 of 364 days1995: Moderate 128 of 364 days1995: Unhealthy for Sensitive Groups 23 of 364 days1995: Unhealthy 1 of 364 days19951996: Good 158 of 364 days1996: Moderate 65 of 364 days1996: Unhealthy for Sensitive Groups 64 of 364 days1996: Unhealthy 66 of 364 days1996: Very Unhealthy 11 of 364 days1997: Good 157 of 364 days1997: Moderate 119 of 364 days1997: Unhealthy for Sensitive Groups 66 of 364 days1997: Unhealthy 21 of 364 days1997: Very Unhealthy 1 of 364 days1998: Good 209 of 364 days1998: Moderate 87 of 364 days1998: Unhealthy for Sensitive Groups 36 of 364 days1998: Unhealthy 31 of 364 days1998: Very Unhealthy 1 of 364 days1999: Good 148 of 362 days1999: Moderate 109 of 362 days1999: Unhealthy for Sensitive Groups 76 of 362 days1999: Unhealthy 28 of 362 days1999: Very Unhealthy 1 of 362 days2000: Good 139 of 364 days2000: Moderate 103 of 364 days2000: Unhealthy for Sensitive Groups 77 of 364 days2000: Unhealthy 43 of 364 days2000: Very Unhealthy 2 of 364 days20002001: Good 149 of 361 days2001: Moderate 136 of 361 days2001: Unhealthy for Sensitive Groups 52 of 361 days2001: Unhealthy 23 of 361 days2001: Very Unhealthy 1 of 361 days2002: Good 152 of 364 days2002: Moderate 110 of 364 days2002: Unhealthy for Sensitive Groups 67 of 364 days2002: Unhealthy 35 of 364 days2003: Good 159 of 364 days2003: Moderate 128 of 364 days2003: Unhealthy for Sensitive Groups 66 of 364 days2003: Unhealthy 11 of 364 days2004: Good 164 of 365 days2004: Moderate 137 of 365 days2004: Unhealthy for Sensitive Groups 56 of 365 days2004: Unhealthy 8 of 365 days2005: Good 196 of 364 days2005: Moderate 120 of 364 days2005: Unhealthy for Sensitive Groups 41 of 364 days2005: Unhealthy 7 of 364 days20052006: Good 172 of 365 days2006: Moderate 113 of 365 days2006: Unhealthy for Sensitive Groups 72 of 365 days2006: Unhealthy 8 of 365 days2007: Good 35 of 365 days2007: Moderate 225 of 365 days2007: Unhealthy for Sensitive Groups 83 of 365 days2007: Unhealthy 21 of 365 days2007: Very Unhealthy 1 of 365 days2008: Good 51 of 366 days2008: Moderate 211 of 366 days2008: Unhealthy for Sensitive Groups 69 of 366 days2008: Unhealthy 32 of 366 days2008: Very Unhealthy 3 of 366 days2009: Good 75 of 365 days2009: Moderate 192 of 365 days2009: Unhealthy for Sensitive Groups 86 of 365 days2009: Unhealthy 11 of 365 days2009: Very Unhealthy 1 of 365 days2010: Good 30 of 365 days2010: Moderate 252 of 365 days2010: Unhealthy for Sensitive Groups 65 of 365 days2010: Unhealthy 15 of 365 days2010: Very Unhealthy 3 of 365 days20102011: Good 78 of 365 days2011: Moderate 205 of 365 days2011: Unhealthy for Sensitive Groups 67 of 365 days2011: Unhealthy 15 of 365 days2012: Good 93 of 366 days2012: Moderate 207 of 366 days2012: Unhealthy for Sensitive Groups 60 of 366 days2012: Unhealthy 6 of 366 days2013: Good 57 of 365 days2013: Moderate 213 of 365 days2013: Unhealthy for Sensitive Groups 80 of 365 days2013: Unhealthy 14 of 365 days2013: Very Unhealthy 1 of 365 days2014: Good 69 of 365 days2014: Moderate 219 of 365 days2014: Unhealthy for Sensitive Groups 52 of 365 days2014: Unhealthy 25 of 365 days2015: Good 72 of 365 days2015: Moderate 223 of 365 days2015: Unhealthy for Sensitive Groups 60 of 365 days2015: Unhealthy 10 of 365 days20152016: Good 61 of 366 days2016: Moderate 231 of 366 days2016: Unhealthy for Sensitive Groups 71 of 366 days2016: Unhealthy 3 of 366 days2017: Good 82 of 365 days2017: Moderate 212 of 365 days2017: Unhealthy for Sensitive Groups 50 of 365 days2017: Unhealthy 21 of 365 days2018: Good 68 of 365 days2018: Moderate 239 of 365 days2018: Unhealthy for Sensitive Groups 49 of 365 days2018: Unhealthy 9 of 365 days2019: Good 123 of 365 days2019: Moderate 201 of 365 days2019: Unhealthy for Sensitive Groups 37 of 365 days2019: Unhealthy 2 of 365 days2019: Hazardous 2 of 365 days2020: Good 76 of 366 days2020: Moderate 220 of 366 days2020: Unhealthy for Sensitive Groups 54 of 366 days2020: Unhealthy 13 of 366 days2020: Very Unhealthy 2 of 366 days2020: Hazardous 1 of 366 days20202021: Good 84 of 365 days2021: Moderate 230 of 365 days2021: Unhealthy for Sensitive Groups 40 of 365 days2021: Unhealthy 10 of 365 days2021: Hazardous 1 of 365 days2022: Good 71 of 365 days2022: Moderate 244 of 365 days2022: Unhealthy for Sensitive Groups 48 of 365 days2022: Unhealthy 2 of 365 days2023: Good 124 of 365 days2023: Moderate 213 of 365 days2023: Unhealthy for Sensitive Groups 28 of 365 days2024: Good 100 of 366 days2024: Moderate 231 of 366 days2024: Unhealthy for Sensitive Groups 33 of 366 days2024: Unhealthy 2 of 366 days2025: Good 126 of 365 days2025: Moderate 228 of 365 days2025: Unhealthy for Sensitive Groups 11 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 year0501001502001980: 90th percentile AQI 841981: 90th percentile AQI 671982: 90th percentile AQI 1051983: 90th percentile AQI 1221984: 90th percentile AQI 1331985: 90th percentile AQI 1151986: 90th percentile AQI 771987: 90th percentile AQI 1221988: 90th percentile AQI 1401989: 90th percentile AQI 1191990: 90th percentile AQI 1001991: 90th percentile AQI 1051992: 90th percentile AQI 821993: 90th percentile AQI 971994: 90th percentile AQI 1191995: 90th percentile AQI 931996: 90th percentile AQI 1791997: 90th percentile AQI 1361998: 90th percentile AQI 1431999: 90th percentile AQI 1472000: 90th percentile AQI 1592001: 90th percentile AQI 1332002: 90th percentile AQI 1472003: 90th percentile AQI 1262004: 90th percentile AQI 1122005: 90th percentile AQI 1052006: 90th percentile AQI 1262007: 90th percentile AQI 1362008: 90th percentile AQI 1432009: 90th percentile AQI 1332010: 90th percentile AQI 1292011: 90th percentile AQI 1292012: 90th percentile AQI 1142013: 90th percentile AQI 1302014: 90th percentile AQI 1262015: 90th percentile AQI 1192016: 90th percentile AQI 1152017: 90th percentile AQI 1252018: 90th percentile AQI 1142019: 90th percentile AQI 1052020: 90th percentile AQI 1242021: 90th percentile AQI 1092022: 90th percentile AQI 1082023: 90th percentile AQI 952024: 90th percentile AQI 1002025: 90th percentile AQI 851980: Median AQI 371981: Median AQI 341982: Median AQI 421983: Median AQI 481984: Median AQI 431985: Median AQI 441986: Median AQI 391987: Median AQI 471988: Median AQI 511989: Median AQI 491990: Median AQI 461991: Median AQI 481992: Median AQI 381993: Median AQI 401994: Median AQI 471995: Median AQI 461996: Median AQI 671997: Median AQI 561998: Median AQI 461999: Median AQI 642000: Median AQI 712001: Median AQI 582002: Median AQI 672003: Median AQI 582004: Median AQI 582005: Median AQI 482006: Median AQI 542007: Median AQI 792008: Median AQI 812009: Median AQI 732010: Median AQI 722011: Median AQI 732012: Median AQI 682013: Median AQI 772014: Median AQI 712015: Median AQI 742016: Median AQI 722017: Median AQI 722018: Median AQI 702019: Median AQI 582020: Median AQI 702021: Median AQI 642022: Median AQI 692023: Median AQI 582024: Median AQI 602025: Median AQI 571980198519901995200020052010201520202025
  • 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)18250%
Ozone15542%
Coarse particles (PM10)288%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2025365126228110005785133PM2.5
20243661002313320060100156Ozone
2023365124213280005895148PM2.5
2022365712444820069108187Ozone
20213658423040100164109685PM2.5
20203667622054132170124548PM2.5
20193651232013720258105508Ozone
2018365682394990070114190Ozone
20173658221250210072125192Ozone
2016366612317130072115156Ozone
20153657222360100074119182Ozone
20143656921952250071126180Ozone
20133655721380141077130204Ozone
2012366932076060068114172Ozone
20113657820567150073129185PM2.5
20103653025265153072129208PM2.5
20093657519286111073133289PM2.5
20083665121169323081143220Ozone
20073653522583211079136219PM2.5
20063651721137280054126190Ozone
20053641961204170048105182Ozone
20043651641375680058112172Ozone
200336415912866110058126187Ozone
200236415211067350067147200Ozone
200136114913652231058133202Ozone
200036413910377432071159205Ozone
199936214810976281064147206Ozone
19983642098736311046143208Ozone
199736415711966211056136201Ozone
199636415865646611067179217Ozone
1995364212128231004693163Ozone
19943631979759100047119192Ozone
199323515559192004097169Ozone
19923492419990003882126Ozone
19913601971193680048105169Ozone
19903562131102840146100317Ozone
19893611811195281049119207Ozone
19883591768180211051140202Ozone
19872241355025140047122197Ozone
19861831353891003977177Ozone
19852991817235110044115190Ozone
19843462156549170043133192Ozone
19833121658550120048122200Ozone
1982255172512660042105177Ozone
19813182595540003467143Ozone
198035927559214003784169Ozone

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 California with a similar median AQI in 2025

All monitored counties in California

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