EnviroNearby

Pasquotank County, North Carolina air quality history

Daily Air Quality Index summaries from EPA monitors in Pasquotank, North Carolina, 1990–2003.

40%
Good days in 2001
53
Median daily AQI, 2001
2
Days above 100 in 2001
132
Days with an AQI in 2001 (of 365)

In 2001, EPA reported a daily Air Quality Index (AQI) for Pasquotank, North Carolina on 132 days. 53 of those days (40%) were in the Good range, and the median daily AQI was 53. That median is about the same as the typical monitored county in North Carolina (median 54 across 45 counties), and higher than the typical monitored U.S. county (44). The main pollutant was fine particles (PM2.5) on 128 days.

EPA did not report an AQI for every day of 2001 here (132 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 2003; EPA's files for 2004–2025 contain no row for it, which usually means its monitors stopped reporting.

Years with fewer than 120 monitored days (1997, 1998, 1999, 2000, 2002, 2003…) 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 18 of 18 days19901991: Good 57 of 59 days1991: Moderate 2 of 59 days19911992: Good 56 of 61 days1992: Moderate 5 of 61 days19921993: Good 59 of 59 days19931994: Good 45 of 46 days1994: Moderate 1 of 46 days19941995: Good 59 of 59 days19951996: Good 55 of 55 days19961997: Good 60 of 60 days19971998: Good 56 of 57 days1998: Moderate 1 of 57 days19981999: Good 54 of 91 days1999: Moderate 35 of 91 days1999: Unhealthy for Sensitive Groups 2 of 91 days19992000: Good 47 of 114 days2000: Moderate 66 of 114 days2000: Unhealthy for Sensitive Groups 1 of 114 days20002001: Good 53 of 132 days2001: Moderate 77 of 132 days2001: Unhealthy for Sensitive Groups 2 of 132 days20012002: Good 50 of 119 days2002: Moderate 68 of 119 days2002: Unhealthy for Sensitive Groups 1 of 119 days20022003: Good 28 of 58 days2003: Moderate 29 of 58 days2003: Unhealthy for Sensitive Groups 1 of 58 days2003
  • 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 351991: 90th percentile AQI 401992: 90th percentile AQI 321993: 90th percentile AQI 311994: 90th percentile AQI 241995: 90th percentile AQI 271996: 90th percentile AQI 231997: 90th percentile AQI 311998: 90th percentile AQI 311999: 90th percentile AQI 762000: 90th percentile AQI 712001: 90th percentile AQI 742002: 90th percentile AQI 682003: 90th percentile AQI 651990: Median AQI 221991: Median AQI 211992: Median AQI 191993: Median AQI 161994: Median AQI 141995: Median AQI 151996: Median AQI 141997: Median AQI 161998: Median AQI 171999: Median AQI 382000: Median AQI 542001: Median AQI 532002: Median AQI 532003: Median AQI 5119901991199219931994199519961997199819992000200120022003
  • Median daily AQI
  • 90th-percentile daily AQI

Main pollutant by day, 2001

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
Fine particles (PM2.5)12897%
Coarse particles (PM10)43%

Year-by-year data

Annual AQI summary by year
YearDays with AQIGoodModerateUnhealthy for Sensitive GroupsUnhealthyVery UnhealthyHazardousMedian AQI90th pct.Max AQIMain pollutant
200358282910005165123PM2.5
2002119506810005368119PM2.5
2001132537720005374105PM2.5
2000114476610005471105PM2.5
199991543520003876116PM2.5
1998575610000173170PM10
1997606000000163146PM10
1996555500000142335PM10
1995595900000152731PM10
1994464510000142464PM10
1993595900000163139PM10
1992615650000193267PM10
1991595720000214054PM10
1990181800000223543PM10

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 North Carolina

Source: U.S. EPA AirData, “Annual AQI by County” files for 1990–2003 (EPA download page). EPA file dates: 2026-06-26. Imported into EnviroNearby November 5, 2026. How we use this data · Report a problem