What is the air quality trend in Heqian?

Over the past 21 days, Heqian had an average AQI of 59 based on station measurements. The worst day was 2026-05-20 with AQI 90.

How is Heqian air quality measured?

Air quality in Heqian 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 Heqian, China

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

Historical PM2.5 and AQI trend from monitoring stations near Heqian, China.

Current AQI
Moderate CAMS model

48 Hours 7 Days 14 Days 20 Days

CSV JSON

Air Quality Index Station

270h

PM2.5 Station

270h · 1 station

Temperature GFS model

80pt

Precipitation GFS model

mm/day

Daily Summary Station

Date	AQI	Range	PM2.5 avg	Hours	Stations
2026-06-09	57	21–129	16.5 µg/m³	11h	1
2026-06-08	48	24–107	13.4 µg/m³	9h	1
2026-06-07	54	25–93	14.8 µg/m³	15h	1
2026-06-06	66	20–129	20.6 µg/m³	13h	1
2026-06-05	69	14–137	21.7 µg/m³	11h	1
2026-06-04	58	21–86	16.5 µg/m³	12h	1
2026-06-03	74	22–127	23.6 µg/m³	13h	1
2026-06-02	66	30–95	19.4 µg/m³	14h	1
2026-06-01	66	53–87	19.1 µg/m³	17h	1
2026-05-31	72	52–104	21.8 µg/m³	15h	1
2026-05-30	60	30–104	17.5 µg/m³	12h	1
2026-05-29	55	34–80	15.0 µg/m³	16h	1
2026-05-28	59	34–119	16.8 µg/m³	12h	1
2026-05-27	54	22–93	14.8 µg/m³	8h	1
2026-05-26	51	13–94	14.0 µg/m³	14h	1
2026-05-25	43	17–79	10.7 µg/m³	17h	1
2026-05-24	49	30–72	12.8 µg/m³	14h	1
2026-05-23	59	30–163	17.8 µg/m³	14h	1
2026-05-22	69	17–157	22.2 µg/m³	15h	1
2026-05-21	38	13–63	9.4 µg/m³	16h	1
2026-05-20	90	68–112	30.1 µg/m³	2h	1

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