SmogRank / United States / Connecticut / Bridgeport
Bridgeport, month by month
Bridgeport has a measured daily mean on 1,360 days since 1 January 2023. Its worst month was June 2023, at 80 US AQI (24.8 µg/m³), 178th of 1,603 cities on that month's world ranking. Its cleanest was October 2025, at 22 US AQI (4.0 µg/m³). 2025 averaged 36 US AQI (6.4 µg/m³), against 33 US AQI (6.0 µg/m³) in 2024.
Every month since 2023
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
Bridgeport's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| June 2023 | 8024.8 µg/m³ | 178thof 1,603 | Eastern United States and Canada, June and July 2023 Eastern United States and Canada, May and June 2023 |
| July 2023 | 6114.4 µg/m³ | 174thof 1,432 | North-eastern United States, 19 July 2023 Eastern United States and Canada, June and July 2023 |
| July 2026 | 6013.8 µg/m³ | 620thof 2,784 | Northern United States and Canada, July 2026 |
| June 2025 | 529.7 µg/m³ | 1,391stof 2,508 | – |
| July 2025 | 519.3 µg/m³ | 1,449thof 2,889 | North-eastern United States and Canada, 29 July to 9 August 2025 North-eastern United States and Canada, 24 to 28 July 2025 |
| February 2023 | 498.9 µg/m³ | 740thof 1,129 | – |
Monthly means over the days measured; finished months only. World rank: its place on that month's world ranking of every city with enough days. Each month opens that ranking.
Bridgeport's worst days
| Day | US AQI | Episode |
|---|---|---|
| 7 Jun 2023 | 240165.0 µg/m³ | Eastern United States and Canada, May and June 2023 |
| 8 Jun 2023 | 18096.8 µg/m³ | Eastern United States and Canada, May and June 2023 |
| 6 Jun 2023 | 16981.0 µg/m³ | Eastern United States and Canada, May and June 2023 |
| 16 Jul 2026 | 15865.6 µg/m³ | Northern United States and Canada, July 2026 |
| 30 Jun 2023 | 15460.0 µg/m³ | Eastern United States and Canada, June and July 2023 |
| 18 Jul 2026 | 15358.7 µg/m³ | Northern United States and Canada, July 2026 |
| 1 Jul 2023 | 13549.2 µg/m³ | Eastern United States and Canada, June and July 2023 |
| 17 Jul 2026 | 10336.2 µg/m³ | Northern United States and Canada, July 2026 |
| 26 Jul 2025 | 9331.7 µg/m³ | North-eastern United States and Canada, 24 to 28 July 2025 |
| 11 Jun 2023 | 9231.3 µg/m³ | Eastern United States and Canada, May and June 2023 |
Daily means, the highest since 1 Jan 2023; the WHO's daily guideline is 15 µg/m³. Each date opens that day's world ranking, and each episode the bad-air spell it was part of.
Use this history
SmogRank, PM2.5 monthly and daily means, Bridgeport, United States, 1 Jan 2023 – 11 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/bridgeport/history (accessed 12 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.
Bridgeport now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 22:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence). Some readings: Uzhydromet (Uzbekistan's Hydrometeorological Service); Department of Environment, Nepal; Vietnam's government monitors; Aurassure; Umhverfisstofnun (Environment Agency of Iceland); RMCAB (Secretaría Distrital de Ambiente, Bogotá); Love My Air (City and County of Denver), no reuse terms published (why we use them).