EnviroNearby

Lander County, Nevada air quality history

Daily Air Quality Index summaries from EPA monitors in Lander, Nevada, 1985–2002.

94%
Good days in 2002
17
Median daily AQI, 2002
2
Days above 100 in 2002
358
Days with an AQI in 2002 (of 365)

In 2002, EPA reported a daily Air Quality Index (AQI) for Lander, Nevada on 358 days. 338 of those days (94%) were in the Good range, and the median daily AQI was 17. That median is lower than the typical monitored county in Nevada (median 41 across 7 counties), and lower than the typical monitored U.S. county (44). The main pollutant was coarse particles (PM10) on 358 days. Across the years with fuller monitoring, the share of Good days rose: an average of 86% in 1986–1988 versus 96% in 2000–2002.

The most recent year with data for this county is 2002; EPA's files for 2003–2025 contain no row for it, which usually means its monitors stopped reporting.

Years with fewer than 120 monitored days (1991, 1992, 1994, 1995, 1996, 1997…) 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%1985: Good 57 of 82 days1985: Moderate 25 of 82 days19851986: Good 132 of 154 days1986: Moderate 22 of 154 days1987: Good 155 of 172 days1987: Moderate 17 of 172 days19871988: Good 150 of 180 days1988: Moderate 30 of 180 days1989: Good 36 of 42 days1989: Moderate 6 of 42 days19891990: Good 31 of 49 days1990: Moderate 17 of 49 days1990: Unhealthy for Sensitive Groups 1 of 49 days1991: Good 53 of 56 days1991: Moderate 3 of 56 days19911992: Good 59 of 60 days1992: Moderate 1 of 60 days1994: Good 57 of 61 days1994: Moderate 4 of 61 days19941995: Good 47 of 50 days1995: Moderate 3 of 50 days1996: Good 45 of 54 days1996: Moderate 8 of 54 days1996: Unhealthy for Sensitive Groups 1 of 54 days19961997: Good 52 of 56 days1997: Moderate 4 of 56 days1998: Good 162 of 166 days1998: Moderate 3 of 166 days1998: Unhealthy for Sensitive Groups 1 of 166 days19981999: Good 139 of 147 days1999: Moderate 8 of 147 days2000: Good 336 of 344 days2000: Moderate 6 of 344 days2000: Unhealthy for Sensitive Groups 1 of 344 days2000: Unhealthy 1 of 344 days20002001: Good 341 of 355 days2001: Moderate 14 of 355 days2002: Good 338 of 358 days2002: Moderate 18 of 358 days2002: Unhealthy for Sensitive Groups 2 of 358 days2002
  • 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 year0501001985: 90th percentile AQI 631986: 90th percentile AQI 541987: 90th percentile AQI 501988: 90th percentile AQI 551989: 90th percentile AQI 561990: 90th percentile AQI 601991: 90th percentile AQI 431992: 90th percentile AQI 411994: 90th percentile AQI 451995: 90th percentile AQI 461996: 90th percentile AQI 541997: 90th percentile AQI 451998: 90th percentile AQI 321999: 90th percentile AQI 382000: 90th percentile AQI 302001: 90th percentile AQI 352002: 90th percentile AQI 391985: Median AQI 441986: Median AQI 341987: Median AQI 301988: Median AQI 341989: Median AQI 321990: Median AQI 371991: Median AQI 271992: Median AQI 301994: Median AQI 311995: Median AQI 321996: Median AQI 371997: Median AQI 291998: Median AQI 141999: Median AQI 202000: Median AQI 162001: Median AQI 172002: Median AQI 17198519871989199119941996199820002002
  • Median daily AQI
  • 90th-percentile daily AQI

Main pollutant by day, 2002

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
Coarse particles (PM10)358100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
20023583381820001739134PM10
2001355341140000173580PM10
2000344336611001630154PM10
199914713980000203882PM10
1998166162310001432105PM10
1997565240000294565PM10
19965445810003754145PM10
1995504730000324671PM10
1994615740000314571PM10
1992605910000304165PM10
1991565330000274356PM10
199049311710003760136PM10
1989423660000325666PM10
1988180150300000345578PM10
1987172155170000305065PM10
1986154132220000345464PM10
19858257250000446391PM10

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.

All monitored counties in Nevada

Source: U.S. EPA AirData, “Annual AQI by County” files for 1985–2002 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem