EnviroNearby

Lincoln County, New Mexico air quality history

Daily Air Quality Index summaries from EPA monitors in Lincoln, New Mexico, 2002–2025.

68%
Good days in 2025
44
Median daily AQI, 2025
1
Days above 100 in 2025
161
Days with an AQI in 2025 (of 365)

In 2025, EPA reported a daily Air Quality Index (AQI) for Lincoln, New Mexico on 161 days. 110 of those days (68%) were in the Good range, and the median daily AQI was 44. That median is about the same as the typical monitored county in New Mexico (median 44 across 13 counties), and higher than the typical monitored U.S. county (40). The main pollutant was ozone on 88 days.

EPA did not report an AQI for every day of 2025 here (161 of 365 days). Figures describe monitored days only; seasonal monitoring (for example, ozone measured only in warmer months) can make a county look cleaner or dirtier than a full-year record would.

Years with fewer than 120 monitored days (2018, 2019, 2020, 2022, 2023, 2024…) 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%2002: Good 107 of 111 days2002: Moderate 4 of 111 days20022003: Good 112 of 116 days2003: Moderate 4 of 116 days2004: Good 118 of 118 days20042005: Good 109 of 112 days2005: Moderate 3 of 112 days2006: Good 101 of 102 days2006: Moderate 1 of 102 days20062007: Good 102 of 103 days2007: Moderate 1 of 103 days2008: Good 109 of 117 days2008: Moderate 8 of 117 days20082009: Good 107 of 108 days2009: Moderate 1 of 108 days2010: Good 100 of 103 days2010: Moderate 2 of 103 days2010: Unhealthy for Sensitive Groups 1 of 103 days20102011: Good 88 of 105 days2011: Moderate 17 of 105 days2012: Good 106 of 114 days2012: Moderate 8 of 114 days20122013: Good 107 of 114 days2013: Moderate 7 of 114 days2014: Good 94 of 102 days2014: Moderate 8 of 102 days20142015: Good 112 of 114 days2015: Moderate 2 of 114 days2016: Good 109 of 113 days2016: Moderate 4 of 113 days20162017: Good 110 of 111 days2017: Moderate 1 of 111 days2018: Good 113 of 116 days2018: Moderate 3 of 116 days20182019: Good 107 of 107 days2020: Good 113 of 115 days2020: Moderate 2 of 115 days20202021: Good 117 of 120 days2021: Moderate 3 of 120 days2022: Good 105 of 109 days2022: Moderate 4 of 109 days20222023: Good 116 of 119 days2023: Moderate 3 of 119 days2024: Good 114 of 117 days2024: Moderate 3 of 117 days20242025: Good 110 of 161 days2025: Moderate 50 of 161 days2025: Unhealthy for Sensitive Groups 1 of 161 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 year0501002002: 90th percentile AQI 412003: 90th percentile AQI 392004: 90th percentile AQI 322005: 90th percentile AQI 372006: 90th percentile AQI 332007: 90th percentile AQI 332008: 90th percentile AQI 402009: 90th percentile AQI 322010: 90th percentile AQI 292011: 90th percentile AQI 552012: 90th percentile AQI 412013: 90th percentile AQI 462014: 90th percentile AQI 352015: 90th percentile AQI 312016: 90th percentile AQI 262017: 90th percentile AQI 302018: 90th percentile AQI 302019: 90th percentile AQI 282020: 90th percentile AQI 372021: 90th percentile AQI 352022: 90th percentile AQI 402023: 90th percentile AQI 322024: 90th percentile AQI 312025: 90th percentile AQI 752002: Median AQI 182003: Median AQI 192004: Median AQI 142005: Median AQI 142006: Median AQI 172007: Median AQI 182008: Median AQI 182009: Median AQI 152010: Median AQI 152011: Median AQI 222012: Median AQI 212013: Median AQI 192014: Median AQI 172015: Median AQI 142016: Median AQI 132017: Median AQI 142018: Median AQI 152019: Median AQI 132020: Median AQI 142021: Median AQI 152022: Median AQI 162023: Median AQI 142024: Median AQI 162025: Median AQI 442002200420062008201020122014201620182020202220242025
  • 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
Ozone8855%
Fine particles (PM2.5)7345%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
20251611105010004475108Ozone
202411711430000163184PM2.5
202311911630000143255PM2.5
202210910540000164079PM2.5
202112011730000153558PM2.5
202011511320000143757PM2.5
201910710700000132842PM2.5
201811611330000153058PM2.5
201711111010000143057PM2.5
201611310940000132673PM2.5
201511411220000143158PM2.5
20141029480000173561PM2.5
201311410770000194657PM2.5
201211410680000214185PM2.5
201110588170000225581PM2.5
2010103100210001529127PM2.5
200910810710000153265PM2.5
200811710980000184066PM2.5
200710310210000183354PM2.5
200610210110000173364PM2.5
200511210930000143755PM2.5
200411811800000143245PM2.5
200311611240000193966PM2.5
200211110740000184180PM2.5

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 Mexico with a similar median AQI in 2025

All monitored counties in New Mexico

Source: U.S. EPA AirData, “Annual AQI by County” files for 2002–2025 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem