EnviroNearby

Warren County, New York air quality history

Daily Air Quality Index summaries from EPA monitors in Warren, New York, 1980–1996.

93%
Good days in 1984
29
Median daily AQI, 1984
2
Days above 100 in 1984
347
Days with an AQI in 1984 (of 366)

In 1984, EPA reported a daily Air Quality Index (AQI) for Warren, New York on 347 days. 324 of those days (93%) were in the Good range, and the median daily AQI was 29. That median is about the same as the typical monitored county in New York (median 31 across 20 counties), and lower than the typical monitored U.S. county (40). The main pollutant was ozone on 347 days.

The most recent year with data for this county is 1996; EPA's files for 1997–2025 contain no row for it, which usually means its monitors stopped reporting.

Years with fewer than 120 monitored days (1991, 1992, 1993, 1994, 1995, 1996…) 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%1980: Good 305 of 339 days1980: Moderate 20 of 339 days1980: Unhealthy for Sensitive Groups 11 of 339 days1980: Unhealthy 3 of 339 days19801981: Good 241 of 250 days1981: Moderate 7 of 250 days1981: Unhealthy for Sensitive Groups 2 of 250 days19811982: Good 292 of 340 days1982: Moderate 33 of 340 days1982: Unhealthy for Sensitive Groups 8 of 340 days1982: Unhealthy 7 of 340 days19821983: Good 336 of 355 days1983: Moderate 14 of 355 days1983: Unhealthy for Sensitive Groups 4 of 355 days1983: Unhealthy 1 of 355 days19831984: Good 324 of 347 days1984: Moderate 21 of 347 days1984: Unhealthy for Sensitive Groups 2 of 347 days19841985: Good 100 of 100 days19851990: Good 29 of 29 days19901991: Good 58 of 59 days1991: Moderate 1 of 59 days19911992: Good 58 of 59 days1992: Moderate 1 of 59 days19921993: Good 54 of 54 days19931994: Good 57 of 58 days1994: Moderate 1 of 58 days19941995: Good 57 of 57 days19951996: Good 38 of 38 days1996
  • 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 year0501001980: 90th percentile AQI 511981: 90th percentile AQI 401982: 90th percentile AQI 671983: 90th percentile AQI 441984: 90th percentile AQI 451985: 90th percentile AQI 401990: 90th percentile AQI 391991: 90th percentile AQI 311992: 90th percentile AQI 361993: 90th percentile AQI 311994: 90th percentile AQI 311995: 90th percentile AQI 281996: 90th percentile AQI 251980: Median AQI 291981: Median AQI 241982: Median AQI 321983: Median AQI 281984: Median AQI 291985: Median AQI 311990: Median AQI 191991: Median AQI 161992: Median AQI 191993: Median AQI 161994: Median AQI 161995: Median AQI 151996: Median AQI 171980198119821983198419851990199119921993199419951996
  • Median daily AQI
  • 90th-percentile daily AQI

Main pollutant by day, 1984

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
Ozone347100%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
1996383800000172549PM10
1995575700000152842PM10
1994585710000163152PM10
1993545400000163144PM10
1992595810000193651PM10
1991595810000163152PM10
1990292900000193942PM10
198510010000000314050Ozone
19843473242120002945136Ozone
19833553361441002844156Ozone
19823402923387003267195Ozone
1981250241720002440105Ozone
198033930520113002951182Ozone

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 New York

Source: U.S. EPA AirData, “Annual AQI by County” files for 1980–1996 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem