SmogRank / United States / California

Air quality in Santa Monica

California, United States. PM2.5 from 48 low-cost sensors, updated hourly.

10.1 µg/m³
Moderate

Latest hour (08:00 UTC), 0.7× the WHO 24-hour guideline.

Rank

24 h
–
not enough data
7 days
#461
of 2,333 · 10.6 µg/m³
30 days
#544
of 2,331 · 8.5 µg/m³
Year
#1,014
of 2,173 · 8.9 µg/m³

Last 4 days, hour by hour

15302026-10-01 00:00 UTC: 8.5 µg/m³2026-10-01 01:00 UTC: 9.2 µg/m³2026-10-01 02:00 UTC: 5.3 µg/m³2026-10-01 03:00 UTC: 5.8 µg/m³2026-10-01 04:00 UTC: 10.1 µg/m³2026-10-01 05:00 UTC: 5.7 µg/m³2026-10-01 06:00 UTC: 5.8 µg/m³2026-10-01 07:00 UTC: 6.3 µg/m³2026-10-01 08:00 UTC: 10.1 µg/m³Sep 28Sep 29Sep 30Oct 1

Times in UTC. Dashed line: WHO 24-hour guideline (15 µg/m³).

Every day for a year

SepNovDecJanFebMarAprMayJunJulAugSepMonWedFri2025-09-29: 6.9 µg/m³2025-09-30: 10.0 µg/m³2025-10-01: 8.1 µg/m³2025-10-02: 6.5 µg/m³2025-10-03: 6.0 µg/m³2025-10-04: 5.9 µg/m³2025-10-05: 7.6 µg/m³2025-10-06: 9.7 µg/m³2025-10-07: 9.9 µg/m³2025-10-08: 8.0 µg/m³2025-10-09: 6.1 µg/m³2025-10-10: 6.5 µg/m³2025-10-11: 5.0 µg/m³2025-10-12: 7.8 µg/m³2025-10-13: 7.3 µg/m³2025-10-14: 3.6 µg/m³2025-10-15: 3.5 µg/m³2025-10-16: 4.5 µg/m³2025-10-17: 7.5 µg/m³2025-10-18: 7.4 µg/m³2025-10-19: 10.3 µg/m³2025-10-20: 21.9 µg/m³2025-10-21: 12.1 µg/m³2025-10-22: 8.9 µg/m³2025-10-23: 7.1 µg/m³2025-10-24: 22.1 µg/m³2025-10-25: 33.7 µg/m³2025-10-26: 21.2 µg/m³2025-10-27: 31.5 µg/m³2025-10-28: 16.6 µg/m³2025-10-29: 7.5 µg/m³2025-10-30: 7.2 µg/m³2025-10-31: 17.3 µg/m³2025-11-01: 19.3 µg/m³2025-11-02: 37.6 µg/m³2025-11-03: 22.7 µg/m³2025-11-04: 21.0 µg/m³2025-11-05: 7.8 µg/m³2025-11-06: 7.5 µg/m³2025-11-07: 14.8 µg/m³2025-11-08: 25.8 µg/m³2025-11-09: 19.8 µg/m³2025-11-10: 13.0 µg/m³2025-11-11: 12.5 µg/m³2025-11-12: 18.2 µg/m³2025-11-13: 28.7 µg/m³2025-11-14: 15.7 µg/m³2025-11-15: 3.6 µg/m³2025-11-16: 4.0 µg/m³2025-11-17: 3.6 µg/m³2025-11-18: 3.7 µg/m³2025-11-19: 4.6 µg/m³2025-11-20: 6.3 µg/m³2025-11-21: 3.0 µg/m³2025-11-22: 3.9 µg/m³2025-11-23: 8.7 µg/m³2025-11-24: 19.7 µg/m³2025-11-25: 9.8 µg/m³2025-11-26: 3.8 µg/m³2025-11-27: 4.6 µg/m³2025-11-28: 15.9 µg/m³2025-11-29: 30.0 µg/m³2025-11-30: 26.2 µg/m³2025-12-01: 26.1 µg/m³2025-12-02: 10.2 µg/m³2025-12-03: 16.6 µg/m³2025-12-04: 3.8 µg/m³2025-12-05: 4.3 µg/m³2025-12-06: 11.1 µg/m³2025-12-07: 14.1 µg/m³2025-12-08: 11.1 µg/m³2025-12-09: 3.7 µg/m³2025-12-10: 5.5 µg/m³2025-12-11: 11.1 µg/m³2025-12-12: 21.1 µg/m³2025-12-13: 26.7 µg/m³2025-12-14: 15.7 µg/m³2025-12-15: 31.6 µg/m³2025-12-16: 23.4 µg/m³2025-12-17: 21.7 µg/m³2025-12-18: 24.2 µg/m³2025-12-19: 16.9 µg/m³2025-12-20: 28.2 µg/m³2025-12-21: 25.7 µg/m³2025-12-22: 22.6 µg/m³2025-12-23: 28.6 µg/m³2025-12-24: 8.0 µg/m³2025-12-25: 5.4 µg/m³2025-12-26: 3.6 µg/m³2025-12-27: 3.6 µg/m³2025-12-28: 3.7 µg/m³2025-12-29: 2.0 µg/m³2025-12-30: 3.6 µg/m³2025-12-31: 4.2 µg/m³2026-01-01: 3.7 µg/m³2026-01-02: 4.8 µg/m³2026-01-03: 8.6 µg/m³2026-01-04: 5.7 µg/m³2026-01-05: 5.2 µg/m³2026-01-06: 4.3 µg/m³2026-01-07: 3.6 µg/m³2026-01-08: 1.3 µg/m³2026-01-09: 4.3 µg/m³2026-01-10: 5.3 µg/m³2026-01-11: 4.0 µg/m³2026-01-12: 4.9 µg/m³2026-01-13: 4.5 µg/m³2026-01-14: 6.5 µg/m³2026-01-15: 3.9 µg/m³2026-01-16: 6.4 µg/m³2026-01-17: 4.6 µg/m³2026-01-18: 4.1 µg/m³2026-01-19: 10.8 µg/m³2026-01-20: 11.0 µg/m³2026-01-21: 25.2 µg/m³2026-01-22: 19.4 µg/m³2026-01-23: 15.2 µg/m³2026-01-24: 6.6 µg/m³2026-01-25: 5.9 µg/m³2026-01-26: 5.1 µg/m³2026-01-27: 4.7 µg/m³2026-01-28: 6.3 µg/m³2026-01-29: 4.2 µg/m³2026-01-30: 4.0 µg/m³2026-01-31: 4.4 µg/m³2026-02-01: 5.2 µg/m³2026-02-02: 9.9 µg/m³2026-02-03: 10.1 µg/m³2026-02-04: 4.5 µg/m³2026-02-05: 4.6 µg/m³2026-02-06: 8.7 µg/m³2026-02-07: 12.1 µg/m³2026-02-08: 6.5 µg/m³2026-02-09: 9.8 µg/m³2026-02-10: 9.4 µg/m³2026-02-11: 4.1 µg/m³2026-02-12: 4.9 µg/m³2026-02-13: 6.9 µg/m³2026-02-14: 7.0 µg/m³2026-02-15: 6.4 µg/m³2026-02-16: 4.5 µg/m³2026-02-17: 4.1 µg/m³2026-02-18: 3.3 µg/m³2026-02-19: 3.5 µg/m³2026-02-20: 3.6 µg/m³2026-02-21: 4.0 µg/m³2026-02-22: 3.8 µg/m³2026-02-23: 4.3 µg/m³2026-02-24: 8.2 µg/m³2026-02-25: 14.2 µg/m³2026-02-26: 18.2 µg/m³2026-02-27: 7.2 µg/m³2026-02-28: 8.3 µg/m³2026-03-01: 9.4 µg/m³2026-03-02: 7.2 µg/m³2026-03-03: 8.2 µg/m³2026-03-04: 15.4 µg/m³2026-03-05: 5.2 µg/m³2026-03-06: 3.9 µg/m³2026-03-07: 3.6 µg/m³2026-03-08: 3.4 µg/m³2026-03-09: 4.6 µg/m³2026-03-10: 6.5 µg/m³2026-03-11: 8.0 µg/m³2026-03-12: 8.2 µg/m³2026-03-13: 7.2 µg/m³2026-03-14: 13.6 µg/m³2026-03-15: 26.4 µg/m³2026-03-16: 13.1 µg/m³2026-03-17: 8.5 µg/m³2026-03-18: 11.2 µg/m³2026-03-19: 11.0 µg/m³2026-03-20: 12.9 µg/m³2026-03-21: 13.2 µg/m³2026-03-22: 23.8 µg/m³2026-03-23: 22.5 µg/m³2026-03-24: 22.9 µg/m³2026-03-25: 16.1 µg/m³2026-03-26: 18.6 µg/m³2026-03-27: 20.3 µg/m³2026-03-28: 14.8 µg/m³2026-03-29: 10.3 µg/m³2026-03-30: 15.9 µg/m³2026-03-31: 10.0 µg/m³2026-04-01: 6.6 µg/m³2026-04-02: 4.4 µg/m³2026-04-03: 5.6 µg/m³2026-04-04: 4.2 µg/m³2026-04-05: 4.4 µg/m³2026-04-06: 5.0 µg/m³2026-04-07: 9.3 µg/m³2026-04-08: 13.6 µg/m³2026-04-09: 12.9 µg/m³2026-04-10: 3.6 µg/m³2026-04-11: 0.5 µg/m³2026-04-12: 0.6 µg/m³2026-04-13: 0.6 µg/m³2026-04-14: 1.5 µg/m³2026-04-15: 5.3 µg/m³2026-04-16: 4.1 µg/m³2026-04-17: 6.0 µg/m³2026-04-18: 6.9 µg/m³2026-04-19: 3.7 µg/m³2026-04-20: 3.9 µg/m³2026-04-21: 1.5 µg/m³2026-04-22: 1.0 µg/m³2026-04-23: 2.2 µg/m³2026-04-24: 2.9 µg/m³2026-04-25: 6.6 µg/m³2026-04-26: 4.7 µg/m³2026-04-27: 2.2 µg/m³2026-04-28: 4.0 µg/m³2026-04-29: 5.9 µg/m³2026-04-30: 10.7 µg/m³2026-05-01: 13.9 µg/m³2026-05-02: 16.5 µg/m³2026-05-03: 3.9 µg/m³2026-05-04: 0.8 µg/m³2026-05-05: 3.4 µg/m³2026-05-06: 2.4 µg/m³2026-05-07: 5.7 µg/m³2026-05-08: 22.3 µg/m³2026-05-09: 28.8 µg/m³2026-05-10: 20.3 µg/m³2026-05-11: 15.8 µg/m³2026-05-12: 9.9 µg/m³2026-05-13: 2.5 µg/m³2026-05-14: 6.4 µg/m³2026-05-15: 7.4 µg/m³2026-05-16: 8.6 µg/m³2026-05-17: 18.3 µg/m³2026-05-18: 28.3 µg/m³2026-05-19: 29.8 µg/m³2026-05-20: 20.1 µg/m³2026-05-21: 11.6 µg/m³2026-05-22: 12.7 µg/m³2026-05-23: 10.9 µg/m³2026-05-24: 7.0 µg/m³2026-05-25: 6.5 µg/m³2026-05-26: 2.2 µg/m³2026-05-27: 1.0 µg/m³2026-05-28: 0.1 µg/m³2026-05-29: 3.4 µg/m³2026-05-30: 3.9 µg/m³2026-05-31: 10.6 µg/m³2026-06-01: 12.1 µg/m³2026-06-02: 15.7 µg/m³2026-06-03: 15.4 µg/m³2026-06-04: 22.8 µg/m³2026-06-05: 21.6 µg/m³2026-06-06: 10.6 µg/m³2026-06-07: 7.1 µg/m³2026-06-08: 7.1 µg/m³2026-06-09: 8.6 µg/m³2026-06-10: 9.1 µg/m³2026-06-11: 11.1 µg/m³2026-06-12: 8.5 µg/m³2026-06-13: 11.4 µg/m³2026-06-14: 11.3 µg/m³2026-06-15: 6.3 µg/m³2026-06-16: 8.9 µg/m³2026-06-17: 7.2 µg/m³2026-06-18: 5.4 µg/m³2026-06-19: 3.7 µg/m³2026-06-20: 7.4 µg/m³2026-06-21: 2.5 µg/m³2026-06-22: 6.0 µg/m³2026-06-23: 13.6 µg/m³2026-06-24: 17.0 µg/m³2026-06-25: 13.8 µg/m³2026-06-26: 12.4 µg/m³2026-06-27: 8.4 µg/m³2026-06-28: 5.0 µg/m³2026-06-29: 6.7 µg/m³2026-06-30: 6.2 µg/m³2026-07-01: 6.9 µg/m³2026-07-02: 4.9 µg/m³2026-07-03: 8.1 µg/m³2026-07-04: 8.6 µg/m³2026-07-05: 6.3 µg/m³2026-07-06: 2.3 µg/m³2026-07-07: 1.9 µg/m³2026-07-08: 3.6 µg/m³2026-07-09: 16.5 µg/m³2026-07-10: 17.5 µg/m³2026-07-11: 12.5 µg/m³2026-07-12: 9.8 µg/m³2026-07-13: 9.3 µg/m³2026-07-14: 9.1 µg/m³2026-07-15: 9.9 µg/m³2026-07-16: 10.2 µg/m³2026-07-17: 7.9 µg/m³2026-07-18: 10.7 µg/m³2026-07-19: 17.2 µg/m³2026-07-20: 14.8 µg/m³2026-07-21: 5.1 µg/m³2026-07-22: 1.6 µg/m³2026-07-23: 2.0 µg/m³2026-07-24: 8.7 µg/m³2026-07-25: 8.5 µg/m³2026-07-26: 8.1 µg/m³2026-07-27: 9.2 µg/m³2026-07-28: 9.9 µg/m³2026-07-29: 9.8 µg/m³2026-07-30: 15.8 µg/m³2026-07-31: 17.4 µg/m³2026-08-01: 14.4 µg/m³2026-08-02: 11.9 µg/m³2026-08-03: 13.7 µg/m³2026-08-04: 14.6 µg/m³2026-08-05: 12.4 µg/m³2026-08-06: 8.4 µg/m³2026-08-07: 13.7 µg/m³2026-08-08: 12.4 µg/m³2026-08-09: 13.3 µg/m³2026-08-10: 8.9 µg/m³2026-08-11: 8.4 µg/m³2026-08-12: 3.4 µg/m³2026-08-13: 0.8 µg/m³2026-08-14: 4.9 µg/m³2026-08-15: 6.5 µg/m³2026-08-16: 8.7 µg/m³2026-08-17: 11.0 µg/m³2026-08-18: 10.4 µg/m³2026-08-19: 10.6 µg/m³2026-08-20: 13.6 µg/m³2026-08-21: 9.5 µg/m³2026-08-22: 6.4 µg/m³2026-08-23: 9.3 µg/m³2026-08-24: 9.3 µg/m³2026-08-25: 9.4 µg/m³2026-08-26: 9.7 µg/m³2026-08-27: 10.5 µg/m³2026-08-28: 10.1 µg/m³2026-08-29: 18.4 µg/m³2026-08-30: 12.8 µg/m³2026-08-31: 10.9 µg/m³2026-09-01: 8.9 µg/m³2026-09-02: 8.8 µg/m³2026-09-03: 8.0 µg/m³2026-09-04: 7.8 µg/m³2026-09-05: 8.6 µg/m³2026-09-06: 4.7 µg/m³2026-09-07: 5.5 µg/m³2026-09-08: 4.9 µg/m³2026-09-09: 4.9 µg/m³2026-09-10: 2.7 µg/m³2026-09-11: 6.1 µg/m³2026-09-12: 11.8 µg/m³2026-09-13: 11.7 µg/m³2026-09-14: 10.2 µg/m³2026-09-15: 8.9 µg/m³2026-09-16: 8.1 µg/m³2026-09-17: 7.1 µg/m³2026-09-18: 7.8 µg/m³2026-09-19: 9.2 µg/m³2026-09-20: 9.5 µg/m³2026-09-21: 8.3 µg/m³2026-09-22: 7.8 µg/m³2026-09-23: 8.0 µg/m³2026-09-24: 12.9 µg/m³2026-09-25: 13.0 µg/m³2026-09-26: 14.9 µg/m³2026-09-27: 9.6 µg/m³2026-09-28: 6.3 µg/m³2026-09-29: 7.8 µg/m³2026-09-30: 10.0 µg/m³
Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data

67 of 365 measured days were over the WHO 24-hour guideline.

Daily world rank

#1#2414OctNovDecJanFebMarAprMayJunJulAugSep

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

2026 against 2025, month by month

15Jan 2025: 11.9 µg/m³Jan 2026: 6.7 µg/m³JanFeb 2025: 10.3 µg/m³Feb 2026: 7.0 µg/m³FebMar 2025: 12.6 µg/m³Mar 2026: 12.1 µg/m³MarApr 2025: 13.8 µg/m³Apr 2026: 4.8 µg/m³AprMay 2025: 16.4 µg/m³May 2026: 10.8 µg/m³MayJun 2025: 15.2 µg/m³Jun 2026: 10.1 µg/m³JunJul 2025: 10.3 µg/m³Jul 2026: 9.2 µg/m³JulAug 2025: 12.1 µg/m³Aug 2026: 10.3 µg/m³AugSep 2025: 9.6 µg/m³Sep 2026: 8.5 µg/m³SepOct 2025: 10.9 µg/m³OctNov 2025: 13.9 µg/m³NovDec 2025: 14.1 µg/m³Dec

Faded bars: 2025. A month shows once it has 10 measured days.

This week against past years

This weekThis week: 10.6 µg/m³10.620252025: 9.4 µg/m³9.420242024: 13.1 µg/m³13.120232023: 13.1 µg/m³13.1

Mean PM2.5 for 24 Sept to 30 Sept in each year. Dashed line: WHO 24-hour guideline.

Monitors

StationOperatorType
Roscomare Rd ES (6363)CC0 1.0ClarityLow-cost
Coeur D Alene ES (6342)CC0 1.0ClarityLow-cost
Webster MS (8481)CC0 1.0ClarityLow-cost
Grand View ES (4247)CC0 1.0ClarityLow-cost
Palisades ES (5959) #1CC0 1.0ClarityLow-cost
Westwood ES (7740)CC0 1.0ClarityLow-cost
Walgrove ES (7603)CC0 1.0ClarityLow-cost
Revere MS (8356) #2CC0 1.0ClarityLow-cost
Brentwood Sci Mag ES (2507)CC0 1.0ClarityLow-cost
Canyon ES (2795) #2CC0 1.0ClarityLow-cost
Brockton ES (2548)CC0 1.0ClarityLow-cost
Warner Ave ES (7616)CC0 1.0ClarityLow-cost
Westminster El (7699)CC0 1.0ClarityLow-cost
Marco Triangle Park, Venice, CaliforniaCC BY 4.0AirGradientLow-cost
Terasaki Life SciencesCC0 1.0ClarityLow-cost
UCLA Ronald Reagan HospitalCC0 1.0ClarityLow-cost
Sycamore Court ApartmentsCC0 1.0ClarityLow-cost
Sproul HallCC0 1.0ClarityLow-cost
AndersonCC0 1.0ClarityLow-cost
Wilshire-MontanaCC BY 4.0AirGradientLow-cost
Community Magnet ES (2741)CC0 1.0ClarityLow-cost
Kenter Canyon ESCC0 1.0ClarityLow-cost
LACC BY 4.0PbLow-cost
West Los AngelesCC BY 4.0AirGradientLow-cost
PicWood_Malcolm_Ave_01CC BY 4.0AirGradientLow-cost
PICOROXBURYCC BY 4.0Mike DLow-cost
NeoshoCC BY 4.0NeoshjoLow-cost
Santa Monica CollegeCC BY 4.0Growing PlaceLow-cost
Revere MS (8356) #1CC0 1.0ClarityLow-cost
Marquez ES (5164) #3CC0 1.0ClarityLow-cost
Palisades HS #3CC0 1.0ClarityLow-cost
Revere MS (8356) #3CC0 1.0ClarityLow-cost
Marquez ES (5164) #1CC0 1.0ClarityLow-cost
Marquez ES (5164) #2CC0 1.0ClarityLow-cost
Palisades ES (5959) #2CC0 1.0ClarityLow-cost
Canyon ES (2795) #1CC0 1.0ClarityLow-cost
Nora Sterry ESCC0 1.0ClarityLow-cost
Palisades HS #2CC0 1.0ClarityLow-cost
Palisades HS #4CC0 1.0ClarityLow-cost
Palisades HS #1CC0 1.0ClarityLow-cost
Emerson MSCC0 1.0ClarityLow-cost
Mar Vista ESCC0 1.0ClarityLow-cost
University HSCC0 1.0ClarityLow-cost
Richland Ave ESCC0 1.0ClarityLow-cost
Fairburn ESCC0 1.0ClarityLow-cost
Del Rey GardensCC BY 4.0AirGradientLow-cost
Sunset ParkCC BY 4.0AirGradientLow-cost
LeveringCC BY 4.0AirGradientLow-cost

No reference monitor here, so the value is the median of low-cost sensors (at least two reporting each hour). Low-cost sensors can read high in humid air. Data via OpenAQ; licences as listed. How we rank. Embed this on your site.

Other cities in United States

Calexico 23.0Jurupa Valley 12.9Riverside 12.3Little Rock 12.2Hanford 11.9Oceanside 11.8Laredo 11.4Shreveport 11.0Wake Forest 11.0Corcoran 11.0Fontana 11.0West Memphis 10.9

30-day averages, µg/m³. All of United States →

Updated 2026-10-01 09:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.