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Research quality control

Data quality, completeness and provenance.

This page records source evidence, normalized monitor-hours, completeness, collector provenance, metadata changes and QC flags. Operational findings, review flags and analytical exclusions are kept separate.

Normalized rows

4,049

Source-snapshot rows used by the application.

Raw ledger rows

7,002

Append-only source records captured since provenance logging began.

Station feeds

73

71 coordinate-deduplicated physical sites.

Latest reporting

69/73

Feeds with PM2.5 or PM10 in the latest archived hour.

PM2.5 completeness

81.3%

3,900/4,800 eligible monitor-hours.

PM10 completeness

82.5%

3,960/4,800 eligible monitor-hours.

Review flags

1

0 total flags created in the last 24 hours.

Failed collector runs

0

49/49 provenance-tracked runs succeeded.

How to read this page

Review is not the same as exclusion.

Research operations →

Operational finding

Something needs attention.

Collector continuity, freshness or release-integrity checks can open a finding. This describes system state, not automatic data removal.

QC review flag

An observation or metadata change is preserved for review.

Flags remain visible in the audit trail. A review flag by itself does not delete or exclude a row.

Analytical exclusion

Only the prespecified analysis rules decide eligibility.

Primary-study inclusion and exclusion follow the frozen protocol and release boundary rather than an ad hoc dashboard decision.

Production deployment

Canonical URL

https://delhiair.shashwattiwary.com

Software

v2.18.0

Environment

production

Commit

not exposed

This block records the public software/deployment context only. API keys and database credentials are never exposed.

Latest provenance-tracked collection

succeeded · collector 2.7.0

Methods 1.1.0 · schema 2 · QC rules 1.0.0. Finished 9 Sept 2026, 3:42 pm.

Raw PM2.5

509

Raw PM10

509

Network raw

144

Normalized feeds

69

Completeness matrix · archive-eligible hours only

Where are the real gaps?

Pre-entry hours are not missing. Window: 6 Sept9 Sept

Monitor feedPM2.56 Sept4 pm5 pm6 pm7 pm8 pm9 pm10 pm6 Sept12 am1 am2 am3 am4 am5 am6 am7 am8 am9 am10 am11 am12 pm1 pm2 pm3 pm4 pm5 pm6 pm7 pm8 pm9 pm10 pm7 Sept12 am1 am2 am3 am4 am5 am6 am7 am8 am9 am10 am11 am12 pm1 pm2 pm3 pm4 pm5 pm6 pm7 pm8 pm9 pm10 pm8 Sept12 am1 am2 am3 am4 am5 am6 am7 am8 am9 am10 am11 am12 pm1 pm2 pm

Alipur, Delhi - DPCC

Delhi · DPCC

0%

Anand Vihar, Delhi - DPCC

Delhi · DPCC

24%

Ashok Vihar, Delhi - DPCC

Delhi · DPCC

24%

Aya Nagar, Delhi - IITM

Delhi · IITM

23%

Bawana, Delhi - DPCC

Delhi · DPCC

23%

Burari Crossing, Delhi - IITM

Delhi · IITM

23%

Cantonment Area, Delhi - DPCC

Delhi · DPCC

24%

Chandni Chowk, Delhi - IITM

Delhi · IITM

24%

Commonwealth Sports Complex, Delhi - DPCC

Delhi · DPCC

23%

CRRI Mathura Road, Delhi - IITM

Delhi · IITM

24%

Dr. Karni Singh Shooting Range, Delhi - DPCC

Delhi · DPCC

23%

DTU, Delhi - CPCB

Delhi · CPCB

25%

Dwarka-Sector 8, Delhi - DPCC

Delhi · DPCC

23%

IGI Airport (T3), Delhi - IITM

Delhi · IITM

24%

IGNOU_Maidan Garhi, Delhi - DPCC

Delhi · DPCC

23%

IHBAS, Dilshad Garden, Delhi - CPCB

Delhi · CPCB

25%

IIT Delhi, Delhi - IITM

Delhi · IITM

24%

IMD Lodhi Road, Delhi - IITM

Delhi · IITM

6%

ITO, Delhi - CPCB

Delhi · CPCB

24%

Jahangirpuri, Delhi - DPCC

Delhi · DPCC

14%

Jawaharlal Nehru Stadium, Delhi - DPCC

Delhi · DPCC

23%

JNU, Delhi - DPCC

Delhi · DPCC

24%

Major Dhyan Chand National Stadium, Delhi - DPCC

Delhi · DPCC

24%

Mandir Marg, Delhi - DPCC

Delhi · DPCC

3%

Mundka, Delhi - DPCC

Delhi · DPCC

24%

Najafgarh, Delhi - DPCC

Delhi · DPCC

7%

Narela, Delhi - DPCC

Delhi · DPCC

24%

Nehru Nagar, Delhi - DPCC

Delhi · DPCC

25%

North Campus, DU, Delhi - IITM

Delhi · IITM

23%

NSIT Dwarka, Delhi - CPCB

Delhi · CPCB

25%

NSUT Jaffarpur, Delhi - DPCC

Delhi · DPCC

24%

Okhla Phase-2, Delhi - DPCC

Delhi · DPCC

24%

Patparganj, Delhi - DPCC

Delhi · DPCC

8%

Punjabi Bagh, Delhi - DPCC

Delhi · DPCC

24%

Pusa, Delhi - DPCC

Delhi · DPCC

20%

Pusa, Delhi - IITM

Delhi · IITM

17%

R K Puram, Delhi - DPCC

Delhi · DPCC

25%

Rohini, Delhi - DPCC

Delhi · DPCC

24%

Shadipur, Delhi - CPCB

Delhi · CPCB

4%

Sirifort, Delhi - CPCB

Delhi · CPCB

25%

Sonia Vihar, Delhi - DPCC

Delhi · DPCC

23%

Sri Aurobindo Marg, Delhi - DPCC

Delhi · DPCC

25%

Talkatora Garden, Delhi - DPCC

Delhi · DPCC

23%

Vivek Vihar, Delhi - DPCC

Delhi · DPCC

24%

Wazirpur, Delhi - DPCC

Delhi · DPCC

24%

Amity University, Panchgaon - IITM

NCR · IITM

0%

Anand Vihar, Hapur - UPPCB

NCR · UPPCB

0%

Arya Nagar, Bahadurgarh - HSPCB

NCR · HSPCB

17%

Govindpuram, Ghaziabad - UPPCB

NCR · UPPCB

17%

Indirapuram, Ghaziabad - UPPCB

NCR · UPPCB

18%

Knowledge Park - III, Greater Noida - UPPCB

NCR · UPPCB

18%

Knowledge Park - V, Greater Noida - UPPCB

NCR · UPPCB

18%

Loni, Ghaziabad - UPPCB

NCR · UPPCB

6%

Nathu Colony, Ballabgarh - HSPCB

NCR · HSPCB

18%

New Industrial Town, Faridabad - HSPCB

NCR · HSPCB

0%

New Industrial Town, Faridabad - HSPCB

NCR · HSPCB

18%

NISE Gwal Pahari, Gurugram - IITM

NCR · IITM

17%

Prashant Garden, Khora - UPPCB

NCR · UPPCB

18%

Sanjay Nagar, Ghaziabad - UPPCB

NCR · UPPCB

18%

Sector - 125, Noida - UPPCB

NCR · UPPCB

18%

Sector - 62, Noida - IITM

NCR · IITM

18%

Sector 11, Faridabad - HSPCB

NCR · HSPCB

17%

Sector 30, Faridabad - HSPCB

NCR · HSPCB

17%

Sector-1, Noida - UPPCB

NCR · UPPCB

0%

Sector-116, Noida - UPPCB

NCR · UPPCB

17%

Sector-2 IMT, Manesar - HSPCB

NCR · HSPCB

0%

Sector-2 IMT, Manesar - HSPCB

NCR · HSPCB

18%

Sector-51, Gurugram - HSPCB

NCR · HSPCB

18%

SRM University, Modinagar - UPPCB

NCR · UPPCB

0%

Teri Gram, Gurugram - HSPCB

NCR · HSPCB

18%

Vasundhara, Ghaziabad - UPPCB

NCR · UPPCB

17%

Ved Vihar-Loni, Ghaziabad - UPPCB

NCR · UPPCB

17%

Vikas Sadan, Gurugram - HSPCB

NCR · HSPCB

6%
PM2.5 + PM10PM2.5 onlyPM10 onlyeligible but missingbefore feed entry

QC review queue

Flagged rows remain in the audit trail

A flag records a condition for review. Primary-study eligibility is determined separately by the frozen protocol.

COORDINATE_SHIFT_GT_1KMreview

station-name:pusa-iitm

Station metadata audit trail

Renames and coordinate changes are events

owner change

station-name:pusa-iitm · station_owner: DPCCIITM

provider change

station-name:pusa-iitm · station_provider: DPCCIITM

coordinate change

station-name:pusa-iitm · coordinates: 28.639652,77.14627528.63611,77.173332

Reproducibility contract

Raw evidence → provenance-tracked run → normalized snapshot → derived analysis.

The raw ledger is append-only from v2.7 onward. Existing pre-v2.7 normalized history is retained and explicitly identified as legacy data without per-run raw provenance. Methods and schema versions are written into future normalized rows.