What changed

Every change signal: sources publishing on time first, then newest period first and strongest first within a period. Signals are recomputed after each release, so a revised value never leaves a stale sentence behind.

SourceStateSystemIndicator

Clear

393 signals for West Bengal. Page 1 of 10. Hide minor signals

+63%Deteriorating

3 October 2026Outside the usual rangeWest Bengal

West Bengal: average air quality index over the 7 days to 3 October 2026 was 87, above the 5-year median of 53 for the same week (+63%).

CPCB air quality Original document Method Data

+42%Deteriorating

3 October 2026Outside the usual rangeWest Bengal

West Bengal: highest city air quality index over the 7 days to 3 October 2026 was 107, above the 5-year median of 76 for the same week (+42%).

CPCB air quality Original document Method Data

HighDeteriorating

3 October 2026RecordWest Bengal

West Bengal: average air quality index of 106 on 3 October 2026 is the highest since 6 March 2026.

CPCB air quality Original document Method Data

+22%Deteriorating

1 October 2026Outside the usual rangeWest Bengal

West Bengal: average air quality index over the 7 days to 1 October 2026 was 69, above the 5-year median of 56 for the same week (+22%).

CPCB air quality Original document Method Data

HighDeteriorating

30 September 2026RecordWest Bengal

West Bengal: average air quality index of 103 on 30 September 2026 is the highest since 6 March 2026.

CPCB air quality Original document Method Data

−25%Improving

26 September 2026Outside the usual rangeWest Bengal

West Bengal: average air quality index over the 7 days to 26 September 2026 was 44, below the 5-year median of 59 for the same week (−25%).

CPCB air quality Original document Method Data

LowImproving

25 September 2026RecordWest Bengal

West Bengal: average air quality index of 37 on 25 September 2026 is the lowest since 30 October 2025.

CPCB air quality Original document Method Data

LowImproving

24 September 2026RecordWest Bengal

West Bengal: average air quality index of 38 on 24 September 2026 is the lowest since 30 October 2025.

CPCB air quality Original document Method Data

+21%Deteriorating

18 September 2026Outside the usual rangeWest Bengal

West Bengal: highest city air quality index over the 7 days to 18 September 2026 was 76, above the 5-year median of 63 for the same week (+21%).

CPCB air quality Original document Method Data

+22%Deteriorating

18 September 2026Outside the usual rangeWest Bengal

West Bengal: average air quality index over the 7 days to 18 September 2026 was 57, above the 5-year median of 46 for the same week (+22%).

CPCB air quality Original document Method Data

+19%Deteriorating

8 September 2026Outside the usual rangeWest Bengal

West Bengal: average air quality index over the 7 days to 8 September 2026 was 64, above the 5-year median of 53 for the same week (+19%).

CPCB air quality Original document Method Data

+69%Deteriorating

22 August 2026Outside the usual rangeWest Bengal

West Bengal: highest city air quality index over the 7 days to 22 August 2026 was 111, above the 5-year median of 66 for the same week (+69%).

CPCB air quality Original document Method Data

+5Unusual

Week 24 of 2026Outside the usual rangeWest Bengal

West Bengal: 5 measles outbreaks in the 4 weeks to week 24 of 2026, against a median of 0 for the same weeks in 2023–25.

IDSP weekly outbreaks Original document Method Data

+5Unusual

Week 23 of 2026Outside the usual rangeWest Bengal

West Bengal: 5 measles outbreaks in the 4 weeks to week 23 of 2026, against a median of 0 for the same weeks in 2023–25.

IDSP weekly outbreaks Original document Method Data

+6Unusual

Week 22 of 2026Outside the usual rangeWest Bengal

West Bengal: 6 measles outbreaks in the 4 weeks to week 22 of 2026, against a median of 0 for the same weeks in 2023–25.

IDSP weekly outbreaks Original document Method Data

+5Unusual

Week 21 of 2026Outside the usual rangeWest Bengal

West Bengal: 5 measles outbreaks in the 4 weeks to week 21 of 2026, against a median of 0 for the same weeks in 2023–25.

IDSP weekly outbreaks Original document Method Data

+100%Unusual

Week 20 of 2026Outside the usual rangeWest Bengal

West Bengal: 12 outbreaks reported in the 4 weeks to week 20 of 2026, against a median of 6 for the same weeks in 2023–25.

IDSP weekly outbreaks Original document Method Data

+6Unusual

Week 19 of 2026Outside the usual rangeWest Bengal

West Bengal: 6 measles outbreaks in the 4 weeks to week 19 of 2026, against a median of 0 for the same weeks in 2023–25.

IDSP weekly outbreaks Original document Method Data

+114%Unusual

Week 19 of 2026Outside the usual rangeWest Bengal

West Bengal: 15 outbreaks reported in the 4 weeks to week 19 of 2026, against a median of 7 for the same weeks in 2023–25.

IDSP weekly outbreaks Original document Method Data

+5Unusual

Week 18 of 2026Outside the usual rangeWest Bengal

West Bengal: 5 measles outbreaks in the 4 weeks to week 18 of 2026, against a median of 0 for the same weeks in 2023–25.

IDSP weekly outbreaks Original document Method Data

+129%Unusual

Week 18 of 2026Outside the usual rangeWest Bengal

West Bengal: 16 outbreaks reported in the 4 weeks to week 18 of 2026, against a median of 7 for the same weeks in 2023–25.

IDSP weekly outbreaks Original document Method Data

+86%Unusual

Week 17 of 2026Outside the usual rangeWest Bengal

West Bengal: 13 outbreaks reported in the 4 weeks to week 17 of 2026, against a median of 7 for the same weeks in 2023–25.

IDSP weekly outbreaks Original document Method Data

MostUnusual

Week 16 of 2026RecordWest Bengal

West Bengal: 6 outbreaks reported in week 16 of 2026, the most since week 18 of 2025.

IDSP weekly outbreaks Original document Method Data

+100%Unusual

Week 12 of 2026Outside the usual rangeWest Bengal

West Bengal: 12 outbreaks reported in the 4 weeks to week 12 of 2026, against a median of 6 for the same weeks in 2023–25.

IDSP weekly outbreaks Original document Method Data

+225%Unusual

Week 11 of 2026Outside the usual rangeWest Bengal

West Bengal: 13 outbreaks reported in the 4 weeks to week 11 of 2026, against a median of 4 for the same weeks in 2023–25.

IDSP weekly outbreaks Original document Method Data

+200%Unusual

Week 10 of 2026Outside the usual rangeWest Bengal

West Bengal: 9 outbreaks reported in the 4 weeks to week 10 of 2026, against a median of 3 for the same weeks in 2023–25.

IDSP weekly outbreaks Original document Method Data

+167%Unusual

Week 9 of 2026Outside the usual rangeWest Bengal

West Bengal: 8 outbreaks reported in the 4 weeks to week 9 of 2026, against a median of 3 for the same weeks in 2023–25.

IDSP weekly outbreaks Original document Method Data

MostUnusual

Week 9 of 2026RecordWest Bengal

West Bengal: 5 outbreaks reported in week 9 of 2026, the most since week 31 of 2025.

IDSP weekly outbreaks Original document Method Data

+450%Unusual

Week 45 of 2025Outside the usual rangeWest Bengal

West Bengal: 11 outbreaks reported in the 4 weeks to week 45 of 2025, against a median of 2 for the same weeks in 2022–24.

IDSP weekly outbreaks Original document Method Data

+1,000%Unusual

Week 44 of 2025Outside the usual rangeWest Bengal

West Bengal: 11 outbreaks reported in the 4 weeks to week 44 of 2025, against a median of 1 for the same weeks in 2022–24.

IDSP weekly outbreaks Original document Method Data

+5Unusual

Week 44 of 2025Outside the usual rangeWest Bengal

West Bengal: 5 food poisoning outbreaks in the 4 weeks to week 44 of 2025, against a median of 0 for the same weeks in 2022–24.

IDSP weekly outbreaks Original document Method Data

+12Unusual

Week 43 of 2025Outside the usual rangeWest Bengal

West Bengal: 12 outbreaks reported in the 4 weeks to week 43 of 2025, against a median of 0 for the same weeks in 2022–24.

IDSP weekly outbreaks Original document Method Data

+5Unusual

Week 43 of 2025Outside the usual rangeWest Bengal

West Bengal: 5 food poisoning outbreaks in the 4 weeks to week 43 of 2025, against a median of 0 for the same weeks in 2022–24.

IDSP weekly outbreaks Original document Method Data

+700%Unusual

Week 42 of 2025Outside the usual rangeWest Bengal

West Bengal: 8 outbreaks reported in the 4 weeks to week 42 of 2025, against a median of 1 for the same weeks in 2022–24.

IDSP weekly outbreaks Original document Method Data

+500%Unusual

Week 39 of 2025Outside the usual rangeWest Bengal

West Bengal: 6 outbreaks reported in the 4 weeks to week 39 of 2025, against a median of 1 for the same weeks in 2022–24.

IDSP weekly outbreaks Original document Method Data

+5Unusual

Week 38 of 2025Outside the usual rangeWest Bengal

West Bengal: 5 acute diarrhoeal disease outbreaks in the 4 weeks to week 38 of 2025, against a median of 0 for the same weeks in 2022–24.

IDSP weekly outbreaks Original document Method Data

+9Unusual

Week 38 of 2025Outside the usual rangeWest Bengal

West Bengal: 9 outbreaks reported in the 4 weeks to week 38 of 2025, against a median of 0 for the same weeks in 2022–24.

IDSP weekly outbreaks Original document Method Data

+900%Unusual

Week 37 of 2025Outside the usual rangeWest Bengal

West Bengal: 10 outbreaks reported in the 4 weeks to week 37 of 2025, against a median of 1 for the same weeks in 2022–24.

IDSP weekly outbreaks Original document Method Data

+400%Unusual

Week 36 of 2025Outside the usual rangeWest Bengal

West Bengal: 10 outbreaks reported in the 4 weeks to week 36 of 2025, against a median of 2 for the same weeks in 2022–24.

IDSP weekly outbreaks Original document Method Data

+200%Unusual

Week 34 of 2025Outside the usual rangeWest Bengal

West Bengal: 9 outbreaks reported in the 4 weeks to week 34 of 2025, against a median of 3 for the same weeks in 2022–24.

IDSP weekly outbreaks Original document Method Data