SmogRank / United States / Washington

Air quality in Grandview

Washington, United States. Over the last 24 hours its air rated Good, the 793rd most polluted of 1,340 cities measured.

24-hour average34US AQI
Good

PM2.5 6.2 µg/m³, 0.4× the WHO 24-hour guideline. The figure the 24-hour ranking uses.

Latest hour: 16 US AQI (2.8 µg/m³), local time

About its typical day over the past year (5.0 µg/m³).

Where Grandview ranks

24 hours#793of 1,340, at 34 US AQI (6.2 µg/m³)
7 days#2,517of 2,680, at 21 US AQI (3.7 µg/m³)
30 days#1,867of 2,888, at 32 US AQI (5.8 µg/m³)
This year#2,172of 2,734, at 39 US AQI (7.1 µg/m³)

Why it ranks here

Seasonal. Over the past year its worst months were August, averaging up to 18.8 µg/m³ against 3.8 in its cleanest month. Seasonal peaks usually come from heating, crop burning, fire or dust seasons.

Based on Grandview's own measurements; causes are the usual kinds for a pattern like this, not a confirmed source.

Bad-air episodes that reached Grandview

Times when Grandview and many cities around it had PM2.5 at twice their usual or more on the same days. All episodes.

The last 12 months, day by day

1102031Nov 2025DecJan 2026FebMarAprMayJunJulAugSepOct2025-11-01: 12.7 µg/m³2025-11-02: 6.9 µg/m³2025-11-03: 3.3 µg/m³2025-11-04: 4.0 µg/m³2025-11-05: 5.9 µg/m³2025-11-06: 2.3 µg/m³2025-11-07: 4.9 µg/m³2025-11-08: 5.9 µg/m³2025-11-09: 7.7 µg/m³2025-11-10: 12.1 µg/m³2025-11-11: 13.1 µg/m³2025-11-12: 11.3 µg/m³2025-11-13: 16.0 µg/m³2025-11-14: no daily value, under 18 hours of readings, or readings that failed our checks2025-11-15: no daily value, under 18 hours of readings, or readings that failed our checks2025-11-16: no daily value, under 18 hours of readings, or readings that failed our checks2025-11-17: no daily value, under 18 hours of readings, or readings that failed our checks2025-11-18: no daily value, under 18 hours of readings, or readings that failed our checks2025-11-19: no daily value, under 18 hours of readings, or readings that failed our checks2025-11-20: 7.8 µg/m³2025-11-21: 8.9 µg/m³2025-11-22: 11.7 µg/m³2025-11-23: 13.2 µg/m³2025-11-24: 8.0 µg/m³2025-11-25: 7.6 µg/m³2025-11-26: 11.0 µg/m³2025-11-27: 2.4 µg/m³2025-11-28: 3.1 µg/m³2025-11-29: 5.8 µg/m³2025-11-30: 6.3 µg/m³2025-12-01: 13.0 µg/m³2025-12-02: 14.0 µg/m³2025-12-03: 12.7 µg/m³2025-12-04: 8.0 µg/m³2025-12-05: 8.5 µg/m³2025-12-06: 1.9 µg/m³2025-12-07: 0.6 µg/m³2025-12-08: 0.8 µg/m³2025-12-09: 2.3 µg/m³2025-12-10: 1.5 µg/m³2025-12-11: 1.0 µg/m³2025-12-12: 10.0 µg/m³2025-12-13: 9.6 µg/m³2025-12-14: 10.4 µg/m³2025-12-15: 3.1 µg/m³2025-12-16: 1.8 µg/m³2025-12-17: 2.1 µg/m³2025-12-18: 2.9 µg/m³2025-12-19: 1.7 µg/m³2025-12-20: 1.4 µg/m³2025-12-21: 4.1 µg/m³2025-12-22: 7.0 µg/m³2025-12-23: 4.7 µg/m³2025-12-24: 4.0 µg/m³2025-12-25: 4.4 µg/m³2025-12-26: 2.9 µg/m³2025-12-27: 3.3 µg/m³2025-12-28: 3.5 µg/m³2025-12-29: 5.9 µg/m³2025-12-30: 6.7 µg/m³2025-12-31: 11.5 µg/m³2026-01-01: 15.1 µg/m³2026-01-02: 13.8 µg/m³2026-01-03: 8.4 µg/m³2026-01-04: 3.8 µg/m³2026-01-05: 4.9 µg/m³2026-01-06: 3.3 µg/m³2026-01-07: 2.3 µg/m³2026-01-08: 2.5 µg/m³2026-01-09: 7.9 µg/m³2026-01-10: 10.3 µg/m³2026-01-11: 13.2 µg/m³2026-01-12: 15.0 µg/m³2026-01-13: 9.7 µg/m³2026-01-14: 8.9 µg/m³2026-01-15: 6.7 µg/m³2026-01-16: 5.0 µg/m³2026-01-17: 5.6 µg/m³2026-01-18: 3.9 µg/m³2026-01-19: 5.1 µg/m³2026-01-20: 5.0 µg/m³2026-01-21: 5.1 µg/m³2026-01-22: 6.9 µg/m³2026-01-23: 6.7 µg/m³2026-01-24: 7.3 µg/m³2026-01-25: 6.7 µg/m³2026-01-26: 11.3 µg/m³2026-01-27: 11.9 µg/m³2026-01-28: 14.3 µg/m³2026-01-29: 18.1 µg/m³2026-01-30: 20.3 µg/m³2026-01-31: 17.2 µg/m³2026-02-01: 5.3 µg/m³2026-02-02: 7.6 µg/m³2026-02-03: 8.4 µg/m³2026-02-04: 8.5 µg/m³2026-02-05: 4.1 µg/m³2026-02-06: 5.7 µg/m³2026-02-07: 4.1 µg/m³2026-02-08: 5.2 µg/m³2026-02-09: 3.5 µg/m³2026-02-10: 4.0 µg/m³2026-02-11: 5.6 µg/m³2026-02-12: 7.5 µg/m³2026-02-13: 10.3 µg/m³2026-02-14: 6.9 µg/m³2026-02-15: 3.2 µg/m³2026-02-16: 2.9 µg/m³2026-02-17: 3.2 µg/m³2026-02-18: 3.8 µg/m³2026-02-19: 3.4 µg/m³2026-02-20: 3.3 µg/m³2026-02-21: 4.9 µg/m³2026-02-22: 3.7 µg/m³2026-02-23: 2.8 µg/m³2026-02-24: 2.3 µg/m³2026-02-25: 2.9 µg/m³2026-02-26: 3.0 µg/m³2026-02-27: 4.7 µg/m³2026-02-28: 5.9 µg/m³2026-03-01: 4.3 µg/m³2026-03-02: 4.9 µg/m³2026-03-03: 3.9 µg/m³2026-03-04: 2.3 µg/m³2026-03-05: 2.7 µg/m³2026-03-06: no daily value, under 18 hours of readings, or readings that failed our checks2026-03-07: no daily value, under 18 hours of readings, or readings that failed our checks2026-03-08: no daily value, under 18 hours of readings, or readings that failed our checks2026-03-09: 2.3 µg/m³2026-03-10: 4.3 µg/m³2026-03-11: 2.1 µg/m³2026-03-12: 3.0 µg/m³2026-03-13: 3.5 µg/m³2026-03-14: 2.8 µg/m³2026-03-15: 2.9 µg/m³2026-03-16: 7.2 µg/m³2026-03-17: 3.9 µg/m³2026-03-18: 3.8 µg/m³2026-03-19: 4.3 µg/m³2026-03-20: 3.9 µg/m³2026-03-21: 3.3 µg/m³2026-03-22: 4.4 µg/m³2026-03-23: 5.1 µg/m³2026-03-24: 3.7 µg/m³2026-03-25: 3.3 µg/m³2026-03-26: 4.9 µg/m³2026-03-27: 4.9 µg/m³2026-03-28: 6.0 µg/m³2026-03-29: 3.7 µg/m³2026-03-30: 3.0 µg/m³2026-03-31: 4.4 µg/m³2026-04-01: 3.8 µg/m³2026-04-02: 2.6 µg/m³2026-04-03: 4.5 µg/m³2026-04-04: 4.5 µg/m³2026-04-05: 4.3 µg/m³2026-04-06: 3.8 µg/m³2026-04-07: 4.2 µg/m³2026-04-08: 4.9 µg/m³2026-04-09: 5.7 µg/m³2026-04-10: 5.4 µg/m³2026-04-11: 4.7 µg/m³2026-04-12: 2.2 µg/m³2026-04-13: 2.2 µg/m³2026-04-14: 2.8 µg/m³2026-04-15: 3.1 µg/m³2026-04-16: 1.9 µg/m³2026-04-17: 3.8 µg/m³2026-04-18: 4.3 µg/m³2026-04-19: 3.8 µg/m³2026-04-20: 4.2 µg/m³2026-04-21: 5.6 µg/m³2026-04-22: 1.8 µg/m³2026-04-23: 2.5 µg/m³2026-04-24: 3.1 µg/m³2026-04-25: 3.9 µg/m³2026-04-26: 4.5 µg/m³2026-04-27: 4.3 µg/m³2026-04-28: 4.2 µg/m³2026-04-29: 3.0 µg/m³2026-04-30: 4.7 µg/m³2026-05-01: 5.1 µg/m³2026-05-02: 6.3 µg/m³2026-05-03: 6.1 µg/m³2026-05-04: 4.3 µg/m³2026-05-05: 5.4 µg/m³2026-05-06: 5.0 µg/m³2026-05-07: 3.4 µg/m³2026-05-08: 5.1 µg/m³2026-05-09: 3.3 µg/m³2026-05-10: 4.3 µg/m³2026-05-11: 4.4 µg/m³2026-05-12: 6.4 µg/m³2026-05-13: 4.1 µg/m³2026-05-14: 0.7 µg/m³2026-05-15: 1.4 µg/m³2026-05-16: 1.2 µg/m³2026-05-17: 2.2 µg/m³2026-05-18: 2.3 µg/m³2026-05-19: 3.1 µg/m³2026-05-20: 4.6 µg/m³2026-05-21: 3.6 µg/m³2026-05-22: 6.0 µg/m³2026-05-23: 6.1 µg/m³2026-05-24: 6.8 µg/m³2026-05-25: 6.3 µg/m³2026-05-26: 3.8 µg/m³2026-05-27: 5.3 µg/m³2026-05-28: 7.2 µg/m³2026-05-29: 5.1 µg/m³2026-05-30: 4.7 µg/m³2026-05-31: 5.1 µg/m³2026-06-01: 5.9 µg/m³2026-06-02: 3.7 µg/m³2026-06-03: 6.6 µg/m³2026-06-04: no daily value, under 18 hours of readings, or readings that failed our checks2026-06-05: 3.1 µg/m³2026-06-06: 0.8 µg/m³2026-06-07: 1.3 µg/m³2026-06-08: 3.2 µg/m³2026-06-09: 1.2 µg/m³2026-06-10: 1.2 µg/m³2026-06-11: 2.6 µg/m³2026-06-12: 3.8 µg/m³2026-06-13: 3.7 µg/m³2026-06-14: 4.5 µg/m³2026-06-15: 22.0 µg/m³2026-06-16: 6.7 µg/m³2026-06-17: 4.5 µg/m³2026-06-18: 5.8 µg/m³2026-06-19: 7.3 µg/m³2026-06-20: 5.6 µg/m³2026-06-21: 5.0 µg/m³2026-06-22: 4.8 µg/m³2026-06-23: 9.4 µg/m³2026-06-24: 9.2 µg/m³2026-06-25: 5.0 µg/m³2026-06-26: 2.2 µg/m³2026-06-27: 1.4 µg/m³2026-06-28: 1.7 µg/m³2026-06-29: 1.8 µg/m³2026-06-30: 1.3 µg/m³2026-07-01: 2.4 µg/m³2026-07-02: 4.4 µg/m³2026-07-03: 3.3 µg/m³2026-07-04: 9.7 µg/m³2026-07-05: 5.0 µg/m³2026-07-06: 7.7 µg/m³2026-07-07: 7.2 µg/m³2026-07-08: 4.4 µg/m³2026-07-09: 2.9 µg/m³2026-07-10: 5.0 µg/m³2026-07-11: 3.5 µg/m³2026-07-12: 2.3 µg/m³2026-07-13: 6.1 µg/m³2026-07-14: 8.8 µg/m³2026-07-15: 9.5 µg/m³2026-07-16: 7.3 µg/m³2026-07-17: 4.3 µg/m³2026-07-18: 3.3 µg/m³2026-07-19: 4.3 µg/m³2026-07-20: 11.3 µg/m³2026-07-21: 20.2 µg/m³2026-07-22: 28.4 µg/m³2026-07-23: 20.4 µg/m³2026-07-24: 7.8 µg/m³2026-07-25: 8.8 µg/m³2026-07-26: 2.9 µg/m³2026-07-27: 13.7 µg/m³2026-07-28: 6.7 µg/m³2026-07-29: 6.5 µg/m³2026-07-30: 14.9 µg/m³2026-07-31: 9.2 µg/m³2026-08-01: 7.6 µg/m³2026-08-02: 3.8 µg/m³2026-08-03: 36.2 µg/m³2026-08-04: 79.5 µg/m³2026-08-05: 71.5 µg/m³2026-08-06: 53.6 µg/m³2026-08-07: 28.7 µg/m³2026-08-08: 11.5 µg/m³2026-08-09: 8.8 µg/m³2026-08-10: 5.5 µg/m³2026-08-11: 4.1 µg/m³2026-08-12: 17.5 µg/m³2026-08-13: 32.5 µg/m³2026-08-14: 23.4 µg/m³2026-08-15: 20.2 µg/m³2026-08-16: 19.7 µg/m³2026-08-17: 14.5 µg/m³2026-08-18: 13.0 µg/m³2026-08-19: 12.8 µg/m³2026-08-20: 13.4 µg/m³2026-08-21: 16.7 µg/m³2026-08-22: 12.9 µg/m³2026-08-23: 7.7 µg/m³2026-08-24: 18.2 µg/m³2026-08-25: 18.8 µg/m³2026-08-26: 11.7 µg/m³2026-08-27: 2.9 µg/m³2026-08-28: 4.4 µg/m³2026-08-29: 2.0 µg/m³2026-08-30: 3.0 µg/m³2026-08-31: 7.6 µg/m³2026-09-01: 7.1 µg/m³2026-09-02: 6.4 µg/m³2026-09-03: 3.1 µg/m³2026-09-04: 4.0 µg/m³2026-09-05: 4.4 µg/m³2026-09-06: 6.1 µg/m³2026-09-07: 6.3 µg/m³2026-09-08: 4.7 µg/m³2026-09-09: 7.6 µg/m³2026-09-10: 8.4 µg/m³2026-09-11: 6.5 µg/m³2026-09-12: 10.3 µg/m³2026-09-13: 3.1 µg/m³2026-09-14: 3.2 µg/m³2026-09-15: 8.2 µg/m³2026-09-16: 5.9 µg/m³2026-09-17: 4.3 µg/m³2026-09-18: 6.5 µg/m³2026-09-19: 10.2 µg/m³2026-09-20: 10.2 µg/m³2026-09-21: 9.8 µg/m³2026-09-22: 8.2 µg/m³2026-09-23: 4.4 µg/m³2026-09-24: 9.9 µg/m³2026-09-25: 2.6 µg/m³2026-09-26: 2.0 µg/m³2026-09-27: 3.9 µg/m³2026-09-28: 3.8 µg/m³2026-09-29: 2.3 µg/m³2026-09-30: 0.9 µg/m³2026-10-01: 2.9 µg/m³2026-10-02: 5.5 µg/m³2026-10-03: 6.7 µg/m³
22 of 334 measured days were over the WHO 24-hour guideline (15 µg/m³). 14 days without a value since 21 Oct 2025, all with under 18 hours of readings or readings that failed our checks; point at a grey square for its reason (why days go blank). One row per month, one square per local day.
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

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

Last 4 days, hour by hour

15303 Oct 18:00 local, 2026-10-04 01:00 UTC: 2.7 µg/m³3 Oct 19:00 local, 2026-10-04 02:00 UTC: 3.1 µg/m³3 Oct 20:00 local, 2026-10-04 03:00 UTC: 4.4 µg/m³3 Oct 21:00 local, 2026-10-04 04:00 UTC: 8.6 µg/m³3 Oct 22:00 local, 2026-10-04 05:00 UTC: 10.9 µg/m³3 Oct 23:00 local, 2026-10-04 06:00 UTC: 8.3 µg/m³4 Oct 00:00 local, 2026-10-04 07:00 UTC: 7.2 µg/m³4 Oct 01:00 local, 2026-10-04 08:00 UTC: 9.2 µg/m³4 Oct 02:00 local, 2026-10-04 09:00 UTC: 10.1 µg/m³4 Oct 03:00 local, 2026-10-04 10:00 UTC: 9.7 µg/m³4 Oct 04:00 local, 2026-10-04 11:00 UTC: 9.3 µg/m³4 Oct 05:00 local, 2026-10-04 12:00 UTC: 9.3 µg/m³4 Oct 06:00 local, 2026-10-04 13:00 UTC: 8.8 µg/m³4 Oct 07:00 local, 2026-10-04 14:00 UTC: 9.4 µg/m³4 Oct 08:00 local, 2026-10-04 15:00 UTC: 9.7 µg/m³4 Oct 09:00 local, 2026-10-04 16:00 UTC: 6.3 µg/m³4 Oct 10:00 local, 2026-10-04 17:00 UTC: 3.5 µg/m³4 Oct 11:00 local, 2026-10-04 18:00 UTC: 3.1 µg/m³4 Oct 12:00 local, 2026-10-04 19:00 UTC: 2.9 µg/m³4 Oct 13:00 local, 2026-10-04 20:00 UTC: 2.3 µg/m³4 Oct 14:00 local, 2026-10-04 21:00 UTC: 2.2 µg/m³4 Oct 15:00 local, 2026-10-04 22:00 UTC: 1.8 µg/m³4 Oct 16:00 local, 2026-10-04 23:00 UTC: 1.9 µg/m³4 Oct 17:00 local, 2026-10-05 00:00 UTC: 2.1 µg/m³4 Oct 18:00 local, 2026-10-05 01:00 UTC: 2.4 µg/m³4 Oct 19:00 local, 2026-10-05 02:00 UTC: 2.8 µg/m³Oct 1Oct 2Oct 3Oct 4
Grandview's local time; hover a bar for UTC. Dashed line: WHO 24-hour guideline (15 µg/m³).

Where it stood each day

Top 10Top 100#1#10#100#1,000#3,193NovDecJanFebMarAprMayJunJulAugSep#1,142
Its rank on each day's world board, #1 being the most polluted city that day. Higher is worse. Each gridline down is ten times the rank above it (#1, #10, #100, #1,000), so the top places get the most room. See it among every city.

2026 against 2025, month by month

15Jan 2026: 8.9 µg/m³JanFeb 2026: 4.9 µg/m³FebMar 2026: 3.9 µg/m³MarApr 2026: 3.8 µg/m³AprMay 2026: 4.5 µg/m³MayJun 2026: 4.7 µg/m³JunJul 2026: 8.1 µg/m³JulAug 2026: 18.8 µg/m³AugSep 2026: 5.8 µg/m³SepOctNov 2025: 8.0 µg/m³NovDec 2025: 5.3 µg/m³Dec
Faded bars: 2025. A month shows once it has 10 measured days.

Monitors

PM2.5 from 2 reference monitors, updated hourly. Only 1 of them reported in the last 24 hours.

StationOperatorType
Mabton-B StUS Public DomainAirNowReference
Grandview-W Main StUS Public DomainAirNowReference

The city's value is the median of its reference monitors each hour, when at least a third of them report (three are always enough); 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.

Use this page

SmogRank, PM2.5 daily means, Grandview, United States, 21 Oct 2025 – 3 Oct 2026, smogrank.com/us/grandview-washington (accessed 5 Oct 2026).

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Other cities in United States

30-day averages, US AQI. All of United States.

Updated 2026-10-05 03:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.