EnviroNearby

Schuylkill County, Pennsylvania air quality history

Daily Air Quality Index summaries from EPA monitors in Schuylkill, Pennsylvania, 1990–2007.

100%
Good days in 2007
6
Median daily AQI, 2007
0
Days above 100 in 2007
365
Days with an AQI in 2007 (of 365)

In 2007, EPA reported a daily Air Quality Index (AQI) for Schuylkill, Pennsylvania on 365 days. 365 of those days (100%) were in the Good range, and the median daily AQI was 6. That median is lower than the typical monitored county in Pennsylvania (median 44 across 37 counties), and lower than the typical monitored U.S. county (46). The main pollutant was carbon monoxide (CO) on 365 days. Across the years with fuller monitoring, the share of Good days held roughly steady: an average of 100% in 1991–1993 versus 100% in 2005–2007.

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 (1990) 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%1990: Good 117 of 117 days19901991: Good 364 of 364 days1992: Good 341 of 341 days19921993: Good 365 of 365 days1994: Good 365 of 365 days19941995: Good 362 of 362 days1996: Good 357 of 357 days19961997: Good 332 of 332 days1998: Good 365 of 365 days19981999: Good 364 of 364 days2000: Good 366 of 366 days20002001: Good 364 of 364 days2002: Good 365 of 365 days20022003: Good 353 of 353 days2004: Good 364 of 364 days20042005: Good 358 of 358 days2006: Good 353 of 353 days20062007: Good 365 of 365 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 year0501001990: 90th percentile AQI 141991: 90th percentile AQI 131992: 90th percentile AQI 151993: 90th percentile AQI 141994: 90th percentile AQI 131995: 90th percentile AQI 131996: 90th percentile AQI 141997: 90th percentile AQI 81998: 90th percentile AQI 81999: 90th percentile AQI 82000: 90th percentile AQI 112001: 90th percentile AQI 62002: 90th percentile AQI 72003: 90th percentile AQI 82004: 90th percentile AQI 52005: 90th percentile AQI 102006: 90th percentile AQI 72007: 90th percentile AQI 111990: Median AQI 51991: Median AQI 71992: Median AQI 81993: Median AQI 91994: Median AQI 71995: Median AQI 81996: Median AQI 71997: Median AQI 31998: Median AQI 11999: Median AQI 22000: Median AQI 32001: Median AQI 22002: Median AQI 32003: Median AQI 22004: Median AQI 22005: Median AQI 32006: Median AQI 32007: Median AQI 61990199219941996199820002002200420062007
  • 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
Carbon monoxide (CO)365100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
20073653650000061117CO
2006353353000003715CO
20053583580000031024CO
2004364364000002510CO
2003353353000002816CO
2002365365000003715CO
2001364364000002611CO
20003663660000031117CO
1999364364000002818CO
1998365365000001817CO
1997332332000003819CO
19963573570000071427CO
19953623620000081335CO
19943653650000071320CO
19933653650000091419CO
19923413410000081538CO
19913643640000071327CO
19901171170000051419CO

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 Pennsylvania

Source: U.S. EPA AirData, “Annual AQI by County” files for 1990–2007 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem