SmogRank / Ireland / Connacht

Air quality in Galway

Connacht, Ireland. PM2.5 from 2 reference monitors, updated hourly.

5.6µg/m³
Good

Latest hour (15:00 UTC), 0.4× the WHO 24-hour guideline.

Rank, worst first

24 hours–not enough data
7 days#1,570of 2,330, at 5.8 µg/m³
30 days#1,108of 2,324, at 6.3 µg/m³
This year–not enough data

The last 12 months, day by day

1102031Oct 2025NovDecJan 2026FebMarAprMayJunJulAugSep2025-10-01: no data2025-10-02: no data2025-10-03: 7.6 µg/m³2025-10-04: 7.5 µg/m³2025-10-05: 7.9 µg/m³2025-10-06: no data2025-10-07: 4.9 µg/m³2025-10-08: 9.9 µg/m³2025-10-09: no data2025-10-10: no data2025-10-11: 4.9 µg/m³2025-10-12: 9.4 µg/m³2025-10-13: no data2025-10-14: no data2025-10-15: no data2025-10-16: no data2025-10-17: no data2025-10-18: no data2025-10-19: no data2025-10-20: no data2025-10-21: 4.0 µg/m³2025-10-22: 4.2 µg/m³2025-10-23: no data2025-10-24: 4.8 µg/m³2025-10-25: 3.9 µg/m³2025-10-26: no data2025-10-27: no data2025-10-28: no data2025-10-29: no data2025-10-30: no data2025-10-31: no data2025-11-01: no data2025-11-02: no data2025-11-03: no data2025-11-04: no data2025-11-05: no data2025-11-06: no data2025-11-07: no data2025-11-08: no data2025-11-09: no data2025-11-10: no data2025-11-11: no data2025-11-12: no data2025-11-13: no data2025-11-14: no data2025-11-15: no data2025-11-16: no data2025-11-17: no data2025-11-18: no data2025-11-19: no data2025-11-20: no data2025-11-21: no data2025-11-22: no data2025-11-23: no data2025-11-24: no data2025-11-25: no data2025-11-26: no data2025-11-27: no data2025-11-28: no data2025-11-29: no data2025-11-30: no data2025-12-01: no data2025-12-02: no data2025-12-03: no data2025-12-04: no data2025-12-05: no data2025-12-06: no data2025-12-07: no data2025-12-08: no data2025-12-09: no data2025-12-10: no data2025-12-11: no data2025-12-12: no data2025-12-13: no data2025-12-14: no data2025-12-15: no data2025-12-16: no data2025-12-17: no data2025-12-18: no data2025-12-19: no data2025-12-20: no data2025-12-21: no data2025-12-22: no data2025-12-23: no data2025-12-24: no data2025-12-25: no data2025-12-26: no data2025-12-27: no data2025-12-28: no data2025-12-29: no data2025-12-30: no data2025-12-31: no data2026-01-01: no data2026-01-02: no data2026-01-03: no data2026-01-04: no data2026-01-05: no data2026-01-06: no data2026-01-07: no data2026-01-08: no data2026-01-09: no data2026-01-10: no data2026-01-11: no data2026-01-12: no data2026-01-13: no data2026-01-14: 6.3 µg/m³2026-01-15: no data2026-01-16: no data2026-01-17: no data2026-01-18: no data2026-01-19: no data2026-01-20: no data2026-01-21: 5.2 µg/m³2026-01-22: no data2026-01-23: 9.3 µg/m³2026-01-24: no data2026-01-25: 6.2 µg/m³2026-01-26: no data2026-01-27: no data2026-01-28: no data2026-01-29: no data2026-01-30: no data2026-01-31: no data2026-02-01: no data2026-02-02: no data2026-02-03: no data2026-02-04: no data2026-02-05: no data2026-02-06: no data2026-02-07: no data2026-02-08: no data2026-02-09: no data2026-02-10: no data2026-02-11: no data2026-02-12: no data2026-02-13: no data2026-02-14: no data2026-02-15: no data2026-02-16: no data2026-02-17: no data2026-02-18: no data2026-02-19: no data2026-02-20: no data2026-02-21: 10.8 µg/m³2026-02-22: no data2026-02-23: no data2026-02-24: no data2026-02-25: no data2026-02-26: no data2026-02-27: no data2026-02-28: no data2026-03-01: no data2026-03-02: no data2026-03-03: no data2026-03-04: no data2026-03-05: no data2026-03-06: no data2026-03-07: no data2026-03-08: no data2026-03-09: no data2026-03-10: no data2026-03-11: no data2026-03-12: no data2026-03-13: no data2026-03-14: no data2026-03-15: no data2026-03-16: no data2026-03-17: no data2026-03-18: no data2026-03-19: no data2026-03-20: no data2026-03-21: no data2026-03-22: no data2026-03-23: no data2026-03-24: no data2026-03-25: no data2026-03-26: no data2026-03-27: no data2026-03-28: no data2026-03-29: 13.2 µg/m³2026-03-30: 14.0 µg/m³2026-03-31: 8.9 µg/m³2026-04-01: no data2026-04-02: 4.2 µg/m³2026-04-03: 4.3 µg/m³2026-04-04: 4.3 µg/m³2026-04-05: 4.1 µg/m³2026-04-06: 4.8 µg/m³2026-04-07: 11.0 µg/m³2026-04-08: 6.4 µg/m³2026-04-09: 7.7 µg/m³2026-04-10: 6.9 µg/m³2026-04-11: 8.1 µg/m³2026-04-12: 8.2 µg/m³2026-04-13: 4.5 µg/m³2026-04-14: 3.8 µg/m³2026-04-15: 4.7 µg/m³2026-04-16: 8.3 µg/m³2026-04-17: 7.6 µg/m³2026-04-18: 5.1 µg/m³2026-04-19: 5.2 µg/m³2026-04-20: 4.1 µg/m³2026-04-21: 6.9 µg/m³2026-04-22: 9.1 µg/m³2026-04-23: 10.2 µg/m³2026-04-24: 10.1 µg/m³2026-04-25: 7.7 µg/m³2026-04-26: 3.6 µg/m³2026-04-27: 5.1 µg/m³2026-04-28: 8.6 µg/m³2026-04-29: 8.6 µg/m³2026-04-30: 8.6 µg/m³2026-05-01: 9.6 µg/m³2026-05-02: 6.4 µg/m³2026-05-03: no data2026-05-04: 4.3 µg/m³2026-05-05: 2.5 µg/m³2026-05-06: 3.6 µg/m³2026-05-07: 3.2 µg/m³2026-05-08: 3.8 µg/m³2026-05-09: 3.6 µg/m³2026-05-10: 3.3 µg/m³2026-05-11: 1.8 µg/m³2026-05-12: 8.8 µg/m³2026-05-13: 8.0 µg/m³2026-05-14: 4.7 µg/m³2026-05-15: 4.0 µg/m³2026-05-16: 3.4 µg/m³2026-05-17: 5.0 µg/m³2026-05-18: 2.6 µg/m³2026-05-19: 6.2 µg/m³2026-05-20: 8.3 µg/m³2026-05-21: 4.1 µg/m³2026-05-22: 7.1 µg/m³2026-05-23: 6.8 µg/m³2026-05-24: 4.8 µg/m³2026-05-25: no data2026-05-26: 5.8 µg/m³2026-05-27: 7.7 µg/m³2026-05-28: 7.3 µg/m³2026-05-29: 9.9 µg/m³2026-05-30: 6.5 µg/m³2026-05-31: 8.6 µg/m³2026-06-01: 3.8 µg/m³2026-06-02: 3.7 µg/m³2026-06-03: 5.9 µg/m³2026-06-04: 4.2 µg/m³2026-06-05: 4.3 µg/m³2026-06-06: 3.0 µg/m³2026-06-07: 9.4 µg/m³2026-06-08: no data2026-06-09: no data2026-06-10: no data2026-06-11: 6.6 µg/m³2026-06-12: no data2026-06-13: no data2026-06-14: 4.4 µg/m³2026-06-15: 4.9 µg/m³2026-06-16: 4.0 µg/m³2026-06-17: 7.2 µg/m³2026-06-18: 3.2 µg/m³2026-06-19: 1.7 µg/m³2026-06-20: 3.4 µg/m³2026-06-21: no data2026-06-22: no data2026-06-23: no data2026-06-24: 9.1 µg/m³2026-06-25: 10.6 µg/m³2026-06-26: no data2026-06-27: no data2026-06-28: no data2026-06-29: no data2026-06-30: no data2026-07-01: no data2026-07-02: 4.0 µg/m³2026-07-03: 4.6 µg/m³2026-07-04: 4.1 µg/m³2026-07-05: 2.0 µg/m³2026-07-06: 3.1 µg/m³2026-07-07: 2.3 µg/m³2026-07-08: 1.6 µg/m³2026-07-09: 2.2 µg/m³2026-07-10: 3.7 µg/m³2026-07-11: 4.2 µg/m³2026-07-12: 7.8 µg/m³2026-07-13: 9.7 µg/m³2026-07-14: 8.0 µg/m³2026-07-15: 12.5 µg/m³2026-07-16: 11.1 µg/m³2026-07-17: 11.2 µg/m³2026-07-18: 7.7 µg/m³2026-07-19: no data2026-07-20: 4.2 µg/m³2026-07-21: 2.0 µg/m³2026-07-22: 4.4 µg/m³2026-07-23: 4.4 µg/m³2026-07-24: 4.5 µg/m³2026-07-25: 4.1 µg/m³2026-07-26: 2.3 µg/m³2026-07-27: 3.2 µg/m³2026-07-28: 5.4 µg/m³2026-07-29: 2.2 µg/m³2026-07-30: 3.9 µg/m³2026-07-31: 6.5 µg/m³2026-08-01: 5.0 µg/m³2026-08-02: no data2026-08-03: 6.0 µg/m³2026-08-04: 3.0 µg/m³2026-08-05: 3.7 µg/m³2026-08-06: 2.8 µg/m³2026-08-07: 5.2 µg/m³2026-08-08: 3.6 µg/m³2026-08-09: 3.9 µg/m³2026-08-10: 3.8 µg/m³2026-08-11: 4.7 µg/m³2026-08-12: 4.3 µg/m³2026-08-13: 4.3 µg/m³2026-08-14: 1.7 µg/m³2026-08-15: 1.4 µg/m³2026-08-16: no data2026-08-17: 2.8 µg/m³2026-08-18: 5.2 µg/m³2026-08-19: 3.1 µg/m³2026-08-20: 3.7 µg/m³2026-08-21: 5.1 µg/m³2026-08-22: 4.4 µg/m³2026-08-23: no data2026-08-24: 5.5 µg/m³2026-08-25: 10.0 µg/m³2026-08-26: 8.5 µg/m³2026-08-27: 16.1 µg/m³2026-08-28: 13.5 µg/m³2026-08-29: 6.4 µg/m³2026-08-30: no data2026-08-31: 3.6 µg/m³2026-09-01: 4.8 µg/m³2026-09-02: 2.8 µg/m³2026-09-03: 9.0 µg/m³2026-09-04: 6.4 µg/m³2026-09-05: 4.1 µg/m³2026-09-06: no data2026-09-07: 6.5 µg/m³2026-09-08: 4.5 µg/m³2026-09-09: 4.2 µg/m³2026-09-10: no data2026-09-11: 18.5 µg/m³2026-09-12: 9.5 µg/m³2026-09-13: no data2026-09-14: 2.5 µg/m³2026-09-15: 4.3 µg/m³2026-09-16: 4.7 µg/m³2026-09-17: 10.6 µg/m³2026-09-18: 10.8 µg/m³2026-09-19: 8.6 µg/m³2026-09-20: no data2026-09-21: 2.7 µg/m³2026-09-22: 2.9 µg/m³2026-09-23: 5.2 µg/m³2026-09-24: 4.6 µg/m³2026-09-25: 8.6 µg/m³2026-09-26: 7.4 µg/m³2026-09-27: 4.1 µg/m³2026-09-28: 4.1 µg/m³2026-09-29: 5.5 µg/m³2026-09-30: 6.0 µg/m³
2 of 176 measured days were over the WHO 24-hour guideline (15 µg/m³). One row per month, one square per local day.
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

Last 4 days, hour by hour

15302026-09-30 23:00 UTC: 6.2 µg/m³2026-10-01 00:00 UTC: 6.3 µg/m³2026-10-01 02:00 UTC: 7.9 µg/m³2026-10-01 03:00 UTC: 7.0 µg/m³2026-10-01 04:00 UTC: 7.1 µg/m³2026-10-01 05:00 UTC: 6.4 µg/m³2026-10-01 06:00 UTC: 7.1 µg/m³2026-10-01 07:00 UTC: 7.5 µg/m³2026-10-01 08:00 UTC: 7.9 µg/m³2026-10-01 09:00 UTC: 7.3 µg/m³2026-10-01 11:00 UTC: 6.3 µg/m³2026-10-01 12:00 UTC: 6.3 µg/m³2026-10-01 14:00 UTC: 5.7 µg/m³2026-10-01 15:00 UTC: 5.6 µg/m³Sep 28Sep 29Sep 30Oct 1
Times in UTC. Dashed line: WHO 24-hour guideline (15 µg/m³).

Its world rank, day by day

#1#2388NovDecJanFebMarAprMayJunJulAugSep
Rank on each day's board (1 = most polluted city that day).

2026 against 2025, month by month

15JanFebMarApr 2026: 6.6 µg/m³AprMay 2025: 6.2 µg/m³May 2026: 5.6 µg/m³MayJun 2025: 5.1 µg/m³Jun 2026: 5.3 µg/m³JunJul 2025: 4.3 µg/m³Jul 2026: 5.1 µg/m³JulAug 2025: 7.6 µg/m³Aug 2026: 5.2 µg/m³AugSep 2025: 5.3 µg/m³Sep 2026: 6.3 µg/m³SepOct 2025: 6.3 µg/m³OctNovDec
Faded bars: 2025. A month shows once it has 10 measured days.

This week against past years

This weekThis week: 5.8 µg/m³5.820252025: 4.7 µg/m³4.7
Mean PM2.5 for 24 Sept to 30 Sept in each year. Dashed line: WHO 24-hour guideline.

Monitors

StationOperatorType
Galway BriarhillODC-BYEEAReference
Galway Eyre SquareODC-BYEEAReference
RenmoreCC BY 4.0AirGradientLow-cost

The city's value is the median of its reference monitors each hour; low-cost sensors are listed but not counted when reference monitors exist. Data via OpenAQ; licences as listed. How we rank. Embed this on your site.

Other cities in Ireland

30-day averages, µg/m³. All of Ireland.

Updated 2026-10-01 17:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.