EnviroNearby

Cloud County, Kansas air quality history

Daily Air Quality Index summaries from EPA monitors in Cloud, Kansas, 1985–1997.

100%
Good days in 1997
19
Median daily AQI, 1997
0
Days above 100 in 1997
51
Days with an AQI in 1997 (of 365)

In 1997, EPA reported a daily Air Quality Index (AQI) for Cloud, Kansas on 51 days. 51 of those days (100%) were in the Good range, and the median daily AQI was 19. That median is lower than the typical monitored county in Kansas (median 41.5 across 4 counties), and lower than the typical monitored U.S. county (39). The main pollutant was coarse particles (PM10) on 51 days.

EPA did not report an AQI for every day of 1997 here (51 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.

The most recent year with data for this county is 1997; EPA's files for 1998–2025 contain no row for it, which usually means its monitors stopped reporting.

Years with fewer than 120 monitored days (1992, 1993, 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 1 of 1 days19851986: Good 25 of 40 days1986: Moderate 15 of 40 days19861987: Good 40 of 42 days1987: Moderate 2 of 42 days19871988: Good 32 of 32 days19881989: Good 44 of 47 days1989: Moderate 3 of 47 days19891990: Good 43 of 43 days19901991: Good 27 of 30 days1991: Moderate 3 of 30 days19911992: Good 29 of 29 days19921993: Good 31 of 34 days1993: Moderate 3 of 34 days19931994: Good 55 of 56 days1994: Moderate 1 of 56 days19941995: Good 42 of 45 days1995: Moderate 3 of 45 days19951996: Good 50 of 51 days1996: Moderate 1 of 51 days19961997: Good 51 of 51 days1997
  • 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 191986: 90th percentile AQI 571987: 90th percentile AQI 491988: 90th percentile AQI 361989: 90th percentile AQI 441990: 90th percentile AQI 371991: 90th percentile AQI 551992: 90th percentile AQI 421993: 90th percentile AQI 471994: 90th percentile AQI 431995: 90th percentile AQI 491996: 90th percentile AQI 291997: 90th percentile AQI 261985: Median AQI 191986: Median AQI 451987: Median AQI 271988: Median AQI 231989: Median AQI 241990: Median AQI 231991: Median AQI 281992: Median AQI 301993: Median AQI 221994: Median AQI 261995: Median AQI 261996: Median AQI 201997: Median AQI 191985198619871988198919901991199219931994199519961997
  • Median daily AQI
  • 90th-percentile daily AQI

Main pollutant by day, 1997

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)51100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
1997515100000192633PM10
1996515010000202954PM10
1995454230000264957PM10
1994565510000264354PM10
1993343130000224769PM10
1992292900000304244PM10
1991302730000285565PM10
1990434300000233742PM10
1989474430000244467PM10
1988323200000233646PM10
1987424020000274967PM10
19864025150000455768PM10
19851100000191919PM10

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 Kansas with a similar median AQI in 1997

All monitored counties in Kansas

Source: U.S. EPA AirData, “Annual AQI by County” files for 1985–1997 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem