What is the air quality trend in Siwān?

Over the past 21 days, Siwān had an average AQI of 54 based on station measurements. The worst day was 2026-05-20 with AQI 99.

How is Siwān air quality measured?

Air quality in Siwān is measured by ground-level monitoring stations that report PM2.5 and PM10 concentrations hourly. CERNS.IO aggregates readings from nearby stations and converts PM2.5 to the US EPA Air Quality Index (AQI) scale.

Air Quality History for Siwān, India

Name: Siwān Air Quality History
Creator: CERNS.IO
License: https://creativecommons.org/licenses/by/4.0/

Historical PM2.5 and AQI trend from monitoring stations near Siwān, India.

Current AQI
Good Station

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

265h

PM2.5 Station

265h · 1 station

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-05-30	35	12–55	8.6 µg/m³	7h	1
2026-05-29	62	19–128	20.0 µg/m³	11h	1
2026-05-28	40	11–112	11.0 µg/m³	17h	1
2026-05-27	69	21–180	27.3 µg/m³	10h	1
2026-05-26	91	14–184	38.5 µg/m³	16h	1
2026-05-25	48	10–172	16.8 µg/m³	12h	1
2026-05-24	33	5–72	8.8 µg/m³	16h	2
2026-05-23	50	2–91	15.3 µg/m³	13h	1
2026-05-22	40	9–105	11.5 µg/m³	10h	1
2026-05-21	62	2–198	28.6 µg/m³	11h	1
2026-05-20	99	10–181	41.3 µg/m³	10h	1
2026-05-19	76	3–159	28.3 µg/m³	9h	1
2026-05-18	21	12–37	5.1 µg/m³	9h	1
2026-05-17	74	11–163	26.5 µg/m³	10h	1
2026-05-16	29	12–50	7.0 µg/m³	13h	1
2026-05-15	68	11–169	24.9 µg/m³	18h	2
2026-05-14	53	3–151	16.7 µg/m³	21h	1
2026-05-13	49	7–134	14.5 µg/m³	17h	1
2026-05-12	54	13–94	16.6 µg/m³	14h	1
2026-05-11	53	6–119	16.0 µg/m³	14h	1
2026-05-10	47	31–66	12.3 µg/m³	7h	1

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