SmogRank / United States / Pennsylvania / Natrona Heights
Natrona Heights, month by month
Natrona Heights has a measured daily mean on 499 days since 20 May 2025. Its worst month was July 2026, at 75 US AQI (22.0 µg/m³), 274th of 2,784 cities on that month's world ranking. Its cleanest was October 2025, at 27 US AQI (4.8 µg/m³).
Every month since 2025
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
Months without a mean, and why
1 month
| Month | Why |
|---|---|
| May 2025 | 12 of 31 days measured; a month needs 22. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Natrona Heights's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| July 2026 | 7522.0 µg/m³ | 274thof 2,784 | Northern United States and Canada, July 2026 |
| June 2025 | 5712.3 µg/m³ | 756thof 2,508 | Northern United States and Canada, May and June 2025 |
| July 2025 | 5511.3 µg/m³ | 993rdof 2,889 | North-eastern United States and Canada, 29 July to 9 August 2025 |
| August 2025 | 5410.7 µg/m³ | 1,069thof 2,901 | North-eastern United States and Canada, 29 July to 9 August 2025 |
| February 2026 | 5310.0 µg/m³ | 1,391stof 2,866 | – |
| August 2026 | 529.4 µg/m³ | 1,064thof 2,896 | – |
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.
Natrona Heights's worst days
| Day | US AQI | Episode |
|---|---|---|
| 17 Jul 2026 | 243168.0 µg/m³ | Northern United States and Canada, July 2026 |
| 16 Jul 2026 | 196120.0 µg/m³ | Northern United States and Canada, July 2026 |
| 18 Jul 2026 | 15662.3 µg/m³ | Northern United States and Canada, July 2026 |
| 19 Jul 2026 | 9331.9 µg/m³ | Northern United States and Canada, July 2026 |
| 7 Aug 2025 | 8728.6 µg/m³ | North-eastern United States and Canada, 29 July to 9 August 2025 |
| 8 Aug 2025 | 8527.1 µg/m³ | North-eastern United States and Canada, 29 July to 9 August 2025 |
| 8 Jun 2025 | 8326.2 µg/m³ | Northern United States and Canada, May and June 2025 |
| 7 Jun 2025 | 8125.0 µg/m³ | Northern United States and Canada, May and June 2025 |
| 13 Jun 2025 | 8024.6 µg/m³ | – |
| 6 Aug 2025 | 8024.6 µg/m³ | North-eastern United States and Canada, 29 July to 9 August 2025 |
Daily means, the highest since 20 May 2025; 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, Natrona Heights, United States, 20 May 2025 – 11 Oct 2026. Monitor data from AirNow, via OpenAQ and from the publisher directly; sources listed at smogrank.com/sources. smogrank.com/us/natrona-heights/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.
Natrona Heights now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-12 20:07 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).