EnviroNearby

Graham County, Arizona air quality history

Daily Air Quality Index summaries from EPA monitors in Graham, Arizona, 1985–2007.

98%
Good days in 2007
19
Median daily AQI, 2007
0
Days above 100 in 2007
60
Days with an AQI in 2007 (of 365)

In 2007, EPA reported a daily Air Quality Index (AQI) for Graham, Arizona on 60 days. 59 of those days (98%) were in the Good range, and the median daily AQI was 19. That median is lower than the typical monitored county in Arizona (median 49 across 13 counties), and lower than the typical monitored U.S. county (46). The main pollutant was coarse particles (PM10) on 60 days.

EPA did not report an AQI for every day of 2007 here (60 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 2007; EPA's files for 2008–2025 contain no row for it, which usually means its monitors stopped reporting.

Years with fewer than 120 monitored days (2002, 2003, 2004, 2005, 2006, 2007…) 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 21 of 32 days1985: Moderate 11 of 32 days19851986: Good 44 of 54 days1986: Moderate 10 of 54 days1987: Good 50 of 52 days1987: Moderate 2 of 52 days19871988: Good 41 of 53 days1988: Moderate 12 of 53 days1989: Good 43 of 55 days1989: Moderate 12 of 55 days19891990: Good 50 of 52 days1990: Moderate 2 of 52 days1991: Good 46 of 46 days19911992: Good 55 of 59 days1992: Moderate 4 of 59 days1993: Good 47 of 48 days1993: Moderate 1 of 48 days19931994: Good 54 of 54 days1995: Good 54 of 60 days1995: Moderate 6 of 60 days19951996: Good 40 of 51 days1996: Moderate 11 of 51 days1997: Good 43 of 45 days1997: Moderate 2 of 45 days19971999: Good 25 of 31 days1999: Moderate 6 of 31 days2000: Good 39 of 42 days2000: Moderate 3 of 42 days20002001: Good 58 of 59 days2001: Moderate 1 of 59 days2002: Good 57 of 58 days2002: Moderate 1 of 58 days20022003: Good 57 of 60 days2003: Moderate 3 of 60 days2004: Good 60 of 61 days2004: Moderate 1 of 61 days20042005: Good 53 of 53 days2006: Good 57 of 57 days20062007: Good 59 of 60 days2007: Moderate 1 of 60 days2007
  • 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 601986: 90th percentile AQI 541987: 90th percentile AQI 441988: 90th percentile AQI 591989: 90th percentile AQI 581990: 90th percentile AQI 411991: 90th percentile AQI 301992: 90th percentile AQI 451993: 90th percentile AQI 391994: 90th percentile AQI 381995: 90th percentile AQI 511996: 90th percentile AQI 561997: 90th percentile AQI 421999: 90th percentile AQI 622000: 90th percentile AQI 412001: 90th percentile AQI 312002: 90th percentile AQI 372003: 90th percentile AQI 382004: 90th percentile AQI 242005: 90th percentile AQI 312006: 90th percentile AQI 352007: 90th percentile AQI 311985: Median AQI 401986: Median AQI 311987: Median AQI 291988: Median AQI 361989: Median AQI 361990: Median AQI 231991: Median AQI 221992: Median AQI 291993: Median AQI 231994: Median AQI 221995: Median AQI 301996: Median AQI 331997: Median AQI 221999: Median AQI 312000: Median AQI 242001: Median AQI 192002: Median AQI 212003: Median AQI 192004: Median AQI 132005: Median AQI 202006: Median AQI 192007: Median AQI 19198519871989199119931995199720002002200420062007
  • Median daily AQI
  • 90th-percentile daily AQI

Main pollutant by day, 2007

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)60100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
2007605910000193154PM10
2006575700000193546PM10
2005535300000203146PM10
2004616010000132473PM10
2003605730000193861PM10
2002585710000213766PM10
2001595810000193157PM10
2000423930000244170PM10
1999312560000316286PM10
1997454320000224271PM10
19965140110000335668PM10
1995605460000305188PM10
1994545400000223846PM10
1993484710000233952PM10
1992595540000294594PM10
1991464600000223048PM10
1990525020000234167PM10
19895543120000365877PM10
19885341120000365975PM10
1987525020000294489PM10
19865444100000315476PM10
19853221110000406078PM10

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 Arizona

Source: U.S. EPA AirData, “Annual AQI by County” files for 1985–2007 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem