SmogRank / Germany / North Rhine-Westphalia

Air quality in Niederzier

No new readings from Niederzier's monitors since 3 Oct. Some networks publish days late. The figures below are from before then; they update when the data returns.

North Rhine-Westphalia, Germany.

Mean for 3 Oct52US AQI
Moderate

PM2.5 9.8 µg/m³, 0.7× the WHO 24-hour guideline. The most recent day with readings.

About 1.6× its usual for early October (6.2 µg/m³).

Where Niederzier ranks

24 hours–not enough data
7 days#582of 2,676, at 53 US AQI (10.2 µg/m³), 5 days to 3 Oct
30 days–not enough data
This year#1,331of 2,735, at 50 US AQI (9.0 µg/m³), to 3 Oct

Why it ranks here

Seasonal. Over the past year its worst months were January, averaging up to 15.2 µg/m³ against 5.7 in its cleanest month. Seasonal peaks usually come from heating, crop burning, fire or dust seasons.

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

Bad-air episodes that reached Niederzier

Times when Niederzier and many cities around it had PM2.5 at twice their usual or more on the same days. Latest 8 of 11. All episodes.

The last 12 months, day by day

1102031Nov 2025DecJan 2026FebMarAprMayJunJulAugSepOct2025-11-01: 4.0 µg/m³2025-11-02: 2.7 µg/m³2025-11-03: 3.0 µg/m³2025-11-04: 3.0 µg/m³2025-11-05: 4.0 µg/m³2025-11-06: 7.9 µg/m³2025-11-07: 12.7 µg/m³2025-11-08: 11.4 µg/m³2025-11-09: 13.7 µg/m³2025-11-10: 6.1 µg/m³2025-11-11: 3.5 µg/m³2025-11-12: 5.4 µg/m³2025-11-13: 4.9 µg/m³2025-11-14: 8.8 µg/m³2025-11-15: 16.0 µg/m³2025-11-16: 5.7 µg/m³2025-11-17: 5.5 µg/m³2025-11-18: 6.3 µg/m³2025-11-19: 2.7 µg/m³2025-11-20: 5.8 µg/m³2025-11-21: 11.7 µg/m³2025-11-22: 10.4 µg/m³2025-11-23: 7.3 µg/m³2025-11-24: 4.0 µg/m³2025-11-25: 10.6 µg/m³2025-11-26: 15.5 µg/m³2025-11-27: 10.4 µg/m³2025-11-28: no daily value, under 18 hours of readings, or readings that failed our checks2025-11-29: no daily value, under 18 hours of readings, or readings that failed our checks2025-11-30: no daily value, under 18 hours of readings, or readings that failed our checks2025-12-01: no daily value, under 18 hours of readings, or readings that failed our checks2025-12-02: 6.7 µg/m³2025-12-03: 9.9 µg/m³2025-12-04: 11.2 µg/m³2025-12-05: 10.9 µg/m³2025-12-06: 3.3 µg/m³2025-12-07: 2.9 µg/m³2025-12-08: 1.8 µg/m³2025-12-09: 3.1 µg/m³2025-12-10: 5.8 µg/m³2025-12-11: 6.7 µg/m³2025-12-12: 8.6 µg/m³2025-12-13: 13.7 µg/m³2025-12-14: 5.1 µg/m³2025-12-15: 6.9 µg/m³2025-12-16: 10.5 µg/m³2025-12-17: 11.2 µg/m³2025-12-18: 4.3 µg/m³2025-12-19: 3.9 µg/m³2025-12-20: 10.7 µg/m³2025-12-21: 11.2 µg/m³2025-12-22: 8.4 µg/m³2025-12-23: 8.4 µg/m³2025-12-24: 8.1 µg/m³2025-12-25: 11.9 µg/m³2025-12-26: 19.8 µg/m³2025-12-27: 22.7 µg/m³2025-12-28: 19.7 µg/m³2025-12-29: 19.2 µg/m³2025-12-30: 12.4 µg/m³2025-12-31: 15.4 µg/m³2026-01-01: 9.3 µg/m³2026-01-02: 4.8 µg/m³2026-01-03: 5.9 µg/m³2026-01-04: 6.7 µg/m³2026-01-05: 6.3 µg/m³2026-01-06: 12.5 µg/m³2026-01-07: no daily value, under 18 hours of readings, or readings that failed our checks2026-01-08: no daily value, under 18 hours of readings, or readings that failed our checks2026-01-09: 1.6 µg/m³2026-01-10: 15.8 µg/m³2026-01-11: 13.9 µg/m³2026-01-12: 4.2 µg/m³2026-01-13: 3.9 µg/m³2026-01-14: 5.2 µg/m³2026-01-15: 3.9 µg/m³2026-01-16: 3.1 µg/m³2026-01-17: no daily value, under 18 hours of readings, or readings that failed our checks2026-01-18: 16.0 µg/m³2026-01-19: 17.3 µg/m³2026-01-20: 15.1 µg/m³2026-01-21: 19.0 µg/m³2026-01-22: 25.9 µg/m³2026-01-23: 29.4 µg/m³2026-01-24: 30.4 µg/m³2026-01-25: 39.2 µg/m³2026-01-26: 41.3 µg/m³2026-01-27: 23.8 µg/m³2026-01-28: 23.4 µg/m³2026-01-29: 22.7 µg/m³2026-01-30: 12.0 µg/m³2026-01-31: 13.0 µg/m³2026-02-01: 13.2 µg/m³2026-02-02: 11.8 µg/m³2026-02-03: 15.7 µg/m³2026-02-04: 10.5 µg/m³2026-02-05: 17.3 µg/m³2026-02-06: 14.9 µg/m³2026-02-07: 6.0 µg/m³2026-02-08: 7.4 µg/m³2026-02-09: 9.1 µg/m³2026-02-10: 9.2 µg/m³2026-02-11: 4.4 µg/m³2026-02-12: 4.1 µg/m³2026-02-13: 7.8 µg/m³2026-02-14: 14.0 µg/m³2026-02-15: 9.5 µg/m³2026-02-16: 3.9 µg/m³2026-02-17: 4.5 µg/m³2026-02-18: 6.9 µg/m³2026-02-19: no daily value, under 18 hours of readings, or readings that failed our checks2026-02-20: no daily value, under 18 hours of readings, or readings that failed our checks2026-02-21: 5.0 µg/m³2026-02-22: 1.5 µg/m³2026-02-23: 3.2 µg/m³2026-02-24: 3.5 µg/m³2026-02-25: 5.5 µg/m³2026-02-26: 7.6 µg/m³2026-02-27: 7.9 µg/m³2026-02-28: 3.1 µg/m³2026-03-01: 3.3 µg/m³2026-03-02: 4.7 µg/m³2026-03-03: 12.0 µg/m³2026-03-04: 18.4 µg/m³2026-03-05: 15.7 µg/m³2026-03-06: 17.0 µg/m³2026-03-07: 23.7 µg/m³2026-03-08: 22.3 µg/m³2026-03-09: 19.9 µg/m³2026-03-10: 16.2 µg/m³2026-03-11: 4.2 µg/m³2026-03-12: 5.7 µg/m³2026-03-13: 2.7 µg/m³2026-03-14: 3.2 µg/m³2026-03-15: 6.7 µg/m³2026-03-16: 4.7 µg/m³2026-03-17: 4.8 µg/m³2026-03-18: 7.3 µg/m³2026-03-19: 23.0 µg/m³2026-03-20: 27.3 µg/m³2026-03-21: 19.2 µg/m³2026-03-22: 20.4 µg/m³2026-03-23: 19.4 µg/m³2026-03-24: 21.5 µg/m³2026-03-25: 6.8 µg/m³2026-03-26: 3.9 µg/m³2026-03-27: 6.6 µg/m³2026-03-28: 5.6 µg/m³2026-03-29: 5.4 µg/m³2026-03-30: 4.9 µg/m³2026-03-31: 8.3 µg/m³2026-04-01: 7.0 µg/m³2026-04-02: 9.1 µg/m³2026-04-03: 5.4 µg/m³2026-04-04: 3.6 µg/m³2026-04-05: 4.2 µg/m³2026-04-06: 4.6 µg/m³2026-04-07: 9.6 µg/m³2026-04-08: 15.3 µg/m³2026-04-09: 11.0 µg/m³2026-04-10: 6.8 µg/m³2026-04-11: 8.3 µg/m³2026-04-12: 4.0 µg/m³2026-04-13: 8.4 µg/m³2026-04-14: 16.8 µg/m³2026-04-15: 13.8 µg/m³2026-04-16: 6.7 µg/m³2026-04-17: 12.4 µg/m³2026-04-18: 10.3 µg/m³2026-04-19: 5.8 µg/m³2026-04-20: 5.9 µg/m³2026-04-21: 12.6 µg/m³2026-04-22: 9.6 µg/m³2026-04-23: 8.5 µg/m³2026-04-24: 8.6 µg/m³2026-04-25: 12.2 µg/m³2026-04-26: no daily value, under 18 hours of readings, or readings that failed our checks2026-04-27: 9.9 µg/m³2026-04-28: 9.4 µg/m³2026-04-29: 5.7 µg/m³2026-04-30: 3.8 µg/m³2026-05-01: 4.1 µg/m³2026-05-02: 9.9 µg/m³2026-05-03: no daily value, under 18 hours of readings, or readings that failed our checks2026-05-04: 4.8 µg/m³2026-05-05: 13.0 µg/m³2026-05-06: 6.1 µg/m³2026-05-07: 7.0 µg/m³2026-05-08: 10.6 µg/m³2026-05-09: 10.6 µg/m³2026-05-10: no daily value, under 18 hours of readings, or readings that failed our checks2026-05-11: 6.2 µg/m³2026-05-12: 4.6 µg/m³2026-05-13: 4.5 µg/m³2026-05-14: 3.1 µg/m³2026-05-15: 3.7 µg/m³2026-05-16: 4.0 µg/m³2026-05-17: 2.8 µg/m³2026-05-18: 3.2 µg/m³2026-05-19: 3.9 µg/m³2026-05-20: 4.3 µg/m³2026-05-21: 5.9 µg/m³2026-05-22: 9.4 µg/m³2026-05-23: 7.8 µg/m³2026-05-24: 7.3 µg/m³2026-05-25: no daily value, under 18 hours of readings, or readings that failed our checks2026-05-26: no daily value, under 18 hours of readings, or readings that failed our checks2026-05-27: 8.8 µg/m³2026-05-28: 8.5 µg/m³2026-05-29: 13.7 µg/m³2026-05-30: 12.5 µg/m³2026-05-31: 6.4 µg/m³2026-06-01: 4.1 µg/m³2026-06-02: 4.6 µg/m³2026-06-03: 2.5 µg/m³2026-06-04: 2.0 µg/m³2026-06-05: 3.4 µg/m³2026-06-06: 5.3 µg/m³2026-06-07: no daily value, under 18 hours of readings, or readings that failed our checks2026-06-08: no daily value, under 18 hours of readings, or readings that failed our checks2026-06-09: no daily value, under 18 hours of readings, or readings that failed our checks2026-06-10: no daily value, under 18 hours of readings, or readings that failed our checks2026-06-11: no daily value, under 18 hours of readings, or readings that failed our checks2026-06-12: no daily value, under 18 hours of readings, or readings that failed our checks2026-06-13: no daily value, under 18 hours of readings, or readings that failed our checks2026-06-14: no daily value, under 18 hours of readings, or readings that failed our checks2026-06-15: no daily value, under 18 hours of readings, or readings that failed our checks2026-06-16: no daily value, under 18 hours of readings, or readings that failed our checks2026-06-17: no daily value, under 18 hours of readings, or readings that failed our checks2026-06-18: 5.8 µg/m³2026-06-19: 8.8 µg/m³2026-06-20: 10.6 µg/m³2026-06-21: no daily value, under 18 hours of readings, or readings that failed our checks2026-06-22: no daily value, under 18 hours of readings, or readings that failed our checks2026-06-23: no daily value, under 18 hours of readings, or readings that failed our checks2026-06-24: 13.1 µg/m³2026-06-25: 16.7 µg/m³2026-06-26: 18.1 µg/m³2026-06-27: 19.7 µg/m³2026-06-28: 8.0 µg/m³2026-06-29: 4.4 µg/m³2026-06-30: 6.3 µg/m³2026-07-01: 6.8 µg/m³2026-07-02: 4.8 µg/m³2026-07-03: 4.2 µg/m³2026-07-04: 5.6 µg/m³2026-07-05: 3.9 µg/m³2026-07-06: 2.9 µg/m³2026-07-07: 3.0 µg/m³2026-07-08: 5.9 µg/m³2026-07-09: 7.7 µg/m³2026-07-10: 10.7 µg/m³2026-07-11: 9.5 µg/m³2026-07-12: no daily value, under 18 hours of readings, or readings that failed our checks2026-07-13: 11.4 µg/m³2026-07-14: 11.1 µg/m³2026-07-15: 9.6 µg/m³2026-07-16: 12.2 µg/m³2026-07-17: 12.2 µg/m³2026-07-18: 11.8 µg/m³2026-07-19: no daily value, under 18 hours of readings, or readings that failed our checks2026-07-20: 6.0 µg/m³2026-07-21: 6.0 µg/m³2026-07-22: 4.3 µg/m³2026-07-23: 4.3 µg/m³2026-07-24: no daily value, under 18 hours of readings, or readings that failed our checks2026-07-25: no daily value, under 18 hours of readings, or readings that failed our checks2026-07-26: no daily value, under 18 hours of readings, or readings that failed our checks2026-07-27: no daily value, under 18 hours of readings, or readings that failed our checks2026-07-28: no daily value, under 18 hours of readings, or readings that failed our checks2026-07-29: 10.0 µg/m³2026-07-30: 15.5 µg/m³2026-07-31: 12.9 µg/m³2026-08-01: 3.7 µg/m³2026-08-02: no daily value, under 18 hours of readings, or readings that failed our checks2026-08-03: 9.3 µg/m³2026-08-04: 8.4 µg/m³2026-08-05: 6.3 µg/m³2026-08-06: 4.6 µg/m³2026-08-07: 3.6 µg/m³2026-08-08: 6.1 µg/m³2026-08-09: no daily value, under 18 hours of readings, or readings that failed our checks2026-08-10: 6.1 µg/m³2026-08-11: 4.6 µg/m³2026-08-12: 9.5 µg/m³2026-08-13: 8.9 µg/m³2026-08-14: 11.6 µg/m³2026-08-15: 14.9 µg/m³2026-08-16: no daily value, under 18 hours of readings, or readings that failed our checks2026-08-17: 6.1 µg/m³2026-08-18: 5.9 µg/m³2026-08-19: 5.6 µg/m³2026-08-20: 3.7 µg/m³2026-08-21: 4.0 µg/m³2026-08-22: 4.1 µg/m³2026-08-23: no daily value, under 18 hours of readings, or readings that failed our checks2026-08-24: 5.5 µg/m³2026-08-25: 6.4 µg/m³2026-08-26: 7.8 µg/m³2026-08-27: 8.2 µg/m³2026-08-28: 4.3 µg/m³2026-08-29: 1.9 µg/m³2026-08-30: no daily value, under 18 hours of readings, or readings that failed our checks2026-08-31: 3.1 µg/m³2026-09-01: 5.0 µg/m³2026-09-02: 4.7 µg/m³2026-09-03: 3.6 µg/m³2026-09-04: 2.5 µg/m³2026-09-05: 4.2 µg/m³2026-09-06: no daily value, under 18 hours of readings, or readings that failed our checks2026-09-07: 5.5 µg/m³2026-09-08: 3.1 µg/m³2026-09-09: 3.1 µg/m³2026-09-10: 4.9 µg/m³2026-09-11: no daily value, under 18 hours of readings, or readings that failed our checks2026-09-12: no daily value, under 18 hours of readings, or readings that failed our checks2026-09-13: no daily value, under 18 hours of readings, or readings that failed our checks2026-09-14: no daily value, under 18 hours of readings, or readings that failed our checks2026-09-15: no daily value, under 18 hours of readings, or readings that failed our checks2026-09-16: 5.0 µg/m³2026-09-17: 2.3 µg/m³2026-09-18: 3.9 µg/m³2026-09-19: 5.9 µg/m³2026-09-20: no daily value, under 18 hours of readings, or readings that failed our checks2026-09-21: no daily value, under 18 hours of readings, or readings that failed our checks2026-09-22: no daily value, under 18 hours of readings, or readings that failed our checks2026-09-23: 9.6 µg/m³2026-09-24: 5.5 µg/m³2026-09-25: no daily value, under 18 hours of readings, or readings that failed our checks2026-09-26: no daily value, under 18 hours of readings, or readings that failed our checks2026-09-27: no daily value, under 18 hours of readings, or readings that failed our checks2026-09-28: no daily value, under 18 hours of readings, or readings that failed our checks2026-09-29: 16.2 µg/m³2026-09-30: 11.2 µg/m³2026-10-01: 6.0 µg/m³2026-10-02: 7.8 µg/m³2026-10-03: 9.8 µg/m³2026-10-04: no daily value, no readings from the monitor
44 of 308 measured days were over the WHO 24-hour guideline (15 µg/m³). 57 days without a value: 1 with no readings from the monitor, 56 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

Hour by hour

No hourly readings in the last few days. The chart returns when the monitors' data arrives.

Where it stood each day

Top 10Top 100#1#10#100#1,000#3,193NovDecJanFebMarAprMayJunJulAugSep#591
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 2025: 10.7 µg/m³Jan 2026: 15.2 µg/m³JanFeb 2025: 21.3 µg/m³Feb 2026: 8.0 µg/m³FebMar 2025: 17.0 µg/m³Mar 2026: 11.8 µg/m³MarApr 2025: 11.2 µg/m³Apr 2026: 8.6 µg/m³AprMay 2025: 7.4 µg/m³May 2026: 6.9 µg/m³MayJun 2025: 8.2 µg/m³Jun 2026: 8.3 µg/m³JunJul 2025: 6.6 µg/m³Jul 2026: 8.0 µg/m³JulAug 2025: 7.8 µg/m³Aug 2026: 6.3 µg/m³AugSep 2025: 5.2 µg/m³Sep 2026: 5.7 µg/m³SepOct 2025: 6.4 µg/m³OctNov 2025: 7.5 µg/m³NovDec 2025: 9.8 µg/m³Dec
Faded bars: 2025. A month shows once it has 10 measured days.

This week against past years

This weekThis week: 10.2 µg/m³10.220252025: 10.9 µg/m³10.92024no data2023no data
Mean PM2.5 for 28 Sept to 4 Oct in each year. Dashed line: WHO 24-hour guideline.

Monitors

PM2.5 from 1 reference monitor. None of them reported in the last 24 hours.

StationOperatorType
NiederzierODC-BYEEAReference

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, Niederzier, Germany, 5 Oct 2025 – 3 Oct 2026, smogrank.com/de/niederzier (accessed 5 Oct 2026).

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Other cities in Germany

30-day averages, US AQI. All of Germany.

Updated 2026-10-05 04:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.