SmogRank / Japan / Hyōgo / Kariya
Kariya, month by month
Kariya, Hyōgo has a measured daily mean on 796 days since 28 July 2023. Its worst month was July 2025, at 62 US AQI (15.1 µg/m³), 398th of 2,889 cities on that month's world ranking. Its cleanest was September 2026, at 33 US AQI (6.0 µg/m³).
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
Months without a mean, and why
18 months
| Month | Why |
|---|---|
| Dec 2024 | 12 of 31 days measured; a month needs 22. The others: 19 with under 18 hours of readings or readings that failed our checks. |
| Nov 2024 | 2 of 30 days measured; a month needs 21. The others: 28 with under 18 hours of readings or readings that failed our checks. |
| Oct 2024 | 2 of 31 days measured; a month needs 22. The others: 29 with under 18 hours of readings or readings that failed our checks. |
| Sep 2024 | 4 of 30 days measured; a month needs 21. The others: 26 with under 18 hours of readings or readings that failed our checks. |
| Aug 2024 | 6 of 31 days measured; a month needs 22. The others: 25 with under 18 hours of readings or readings that failed our checks. |
| Jul 2024 | 16 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks. |
| Jun 2024 | 13 of 30 days measured; a month needs 21. The others: 17 with under 18 hours of readings or readings that failed our checks. |
| May 2024 | 16 of 31 days measured; a month needs 22. The others: 15 with under 18 hours of readings or readings that failed our checks. |
| Apr 2024 | 15 of 30 days measured; a month needs 21. The others: 15 with under 18 hours of readings or readings that failed our checks. |
| Mar 2024 | 12 of 31 days measured; a month needs 22. The others: 1 missing from OpenAQ's archive, 18 with under 18 hours of readings or readings that failed our checks. |
| Feb 2024 | 4 of 29 days measured; a month needs 21. The others: 1 missing from OpenAQ's archive, 24 with under 18 hours of readings or readings that failed our checks. |
| Jan 2024 | 2 of 31 days measured; a month needs 22. The others: 29 with under 18 hours of readings or readings that failed our checks. |
| Dec 2023 | 10 of 31 days measured; a month needs 22. The others: 21 with under 18 hours of readings or readings that failed our checks. |
| Nov 2023 | 8 of 30 days measured; a month needs 21. The others: 22 with under 18 hours of readings or readings that failed our checks. |
| Oct 2023 | 11 of 31 days measured; a month needs 22. The others: 20 with under 18 hours of readings or readings that failed our checks. |
| Sep 2023 | 11 of 30 days measured; a month needs 21. The others: 19 with under 18 hours of readings or readings that failed our checks. |
| Aug 2023 | 7 of 31 days measured; a month needs 22. The others: 24 with under 18 hours of readings or readings that failed our checks. |
| Jul 2023 | 2 of 31 days measured; a month needs 22. The others: 2 with under 18 hours of readings or readings that failed our checks. |
A day counts once 18 hours of it are measured; a month needs 70% of its days.
Kariya's worst months
| Month | US AQI | World rank | Episode |
|---|---|---|---|
| July 2025 | 6215.1 µg/m³ | 398thof 2,889 | Japan and South Korea, June and July 2025 |
| June 2025 | 6215.0 µg/m³ | 443rdof 2,508 | Japan and South Korea, June and July 2025 Japan, June 2025 |
| August 2025 | 6214.9 µg/m³ | 363rdof 2,901 | Japan, 25 to 27 August 2025 |
| March 2025 | 6114.5 µg/m³ | 991stof 2,862 | Japan and South Korea, March 2025 Japan and South Korea, February and March 2025 |
| July 2026 | 6114.2 µg/m³ | 575thof 2,784 | Japan and South Korea, July 2026 |
| April 2025 | 5913.6 µg/m³ | 614thof 2,951 | Japan and South Korea, April 2025 |
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.
Kariya's worst days
| Day | US AQI | Episode |
|---|---|---|
| 9 Jul 2025 | 11741.8 µg/m³ | Japan and South Korea, June and July 2025 |
| 5 Jul 2025 | 11541.0 µg/m³ | Japan and South Korea, June and July 2025 |
| 1 Mar 2025 | 11340.5 µg/m³ | Japan and South Korea, February and March 2025 |
| 4 Jul 2025 | 10938.6 µg/m³ | Japan and South Korea, June and July 2025 |
| 23 Jan 2025 | 10838.2 µg/m³ | Japan and South Korea, 17 to 24 January 2025 |
| 28 Feb 2025 | 10838.2 µg/m³ | Japan and South Korea, February and March 2025 |
| 2 Mar 2025 | 10738.0 µg/m³ | Japan and South Korea, February and March 2025 |
| 22 Jul 2026 | 10336.4 µg/m³ | Japan and South Korea, July 2026 |
| 2 Jul 2025 | 9934.8 µg/m³ | Japan and South Korea, June and July 2025 |
| 23 Jul 2026 | 9834.2 µg/m³ | Japan and South Korea, July 2026 |
Daily means, the highest since 28 Jul 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, Kariya, Hyōgo, Japan, 28 Jul 2023 – 12 Oct 2026. Monitor data from Ministry of the Environment Air Pollutant Wide Area Monitoring System via OpenAQ; sources listed at smogrank.com/sources. smogrank.com/jp/kariya-hyogo/history (accessed 13 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.
Kariya now: the last 24 hours, its ranks today and the last 12 months day by day.
Updated 2026-10-13 05:07 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).