Historical Pollutant Standards Index (PSI) (2022)
What this data shows
Published by National Environment Agency. 51,522 records. Fields include Date, Timestamp, Update Timestamp, Region (20 columns in total). Covers 2022-01-01 to 2022-12-31. Last updated 2025-04-16.
Description
National Environment Agency CSV of historical Pollutant Standards Index readings across Singapore for the full 2022 calendar year. SGT timestamped records contain regional PM10, PM2.5, ozone, carbon monoxide, sulphur dioxide, and nitrogen dioxide measures, pollutant sub-indices, and 24-hour and three-hour PSI values. Environmental and public-health researchers can reconstruct haze and air-quality episodes, while accounting for possible missing records and the absence of official climate-data quality control.
Official description
Historical Pollutant Standards Index (PSI) for Singapore. All timestamps are provided in Singapore Time (SGT), formatted in ISO 8601. ⠀ Disclaimer: This dataset may contain missing records and has not undergone quality control procedures applied to climate data and records. For official climate records or climate data reports, please contact [email protected]. Please note that fees may apply for data and report preparation.
- Last updated
- Coverage
- 2022-01-01 – 2022-12-31
- Rows
- 51,522
- Columns
- 20
Chart
Values are summed where multiple rows share the same category.
Compare with another dataset →Data
| Date | Timestamp | Update Timestamp | Region | Region Id | Location Longitude | Location Latitude | Pm10 Twenty Four Hourly | Pm10 Sub Index | Pm25 Twenty Four Hourly | Pm25 Sub Index | O3 Eight Hour Max |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022-01-01 | 2022-01-01T00:00:00+08:00 | 2022-01-01T00:08:53+08:00 | south | rSO | 103.820000 | 1.295870 | 24.000000 | 24.000000 | 7.000000 | 27.000000 | 7.000000 |
| 2022-01-01 | 2022-01-01T00:00:00+08:00 | 2022-01-01T00:08:53+08:00 | north | rNO | 103.820000 | 1.418030 | 22.000000 | 22.000000 | 7.000000 | 29.000000 | 9.000000 |
| 2022-01-01 | 2022-01-01T00:00:00+08:00 | 2022-01-01T00:08:53+08:00 | east | rEA | 103.940000 | 1.357350 | 16.000000 | 16.000000 | 8.000000 | 32.000000 | 13.000000 |
| 2022-01-01 | 2022-01-01T00:00:00+08:00 | 2022-01-01T00:08:53+08:00 | central | rCE | 103.820000 | 1.357350 | 28.000000 | 28.000000 | 7.000000 | 29.000000 | 16.000000 |
| 2022-01-01 | 2022-01-01T00:00:00+08:00 | 2022-01-01T00:08:53+08:00 | west | rWE | 103.700000 | 1.357350 | 17.000000 | 17.000000 | 4.000000 | 17.000000 | 15.000000 |
| 2022-01-01 | 2022-01-01T00:00:00+08:00 | 2022-01-01T00:08:53+08:00 | national | NRS | 0.000000 | 0.000000 | 28.000000 | 28.000000 | 8.000000 | 32.000000 | 16.000000 |
| 2022-01-01 | 2022-01-01T01:00:00+08:00 | 2022-01-01T01:08:52+08:00 | south | rSO | 103.820000 | 1.295870 | 23.000000 | 23.000000 | 6.000000 | 25.000000 | 6.000000 |
| 2022-01-01 | 2022-01-01T01:00:00+08:00 | 2022-01-01T01:08:52+08:00 | north | rNO | 103.820000 | 1.418030 | 22.000000 | 22.000000 | 7.000000 | 30.000000 | 7.000000 |
| 2022-01-01 | 2022-01-01T01:00:00+08:00 | 2022-01-01T01:08:52+08:00 | east | rEA | 103.940000 | 1.357350 | 16.000000 | 16.000000 | 8.000000 | 32.000000 | 10.000000 |
| 2022-01-01 | 2022-01-01T01:00:00+08:00 | 2022-01-01T01:08:52+08:00 | central | rCE | 103.820000 | 1.357350 | 28.000000 | 28.000000 | 7.000000 | 29.000000 | 14.000000 |
Preview shows 10 rows and 12 columns. Use the table search or download the CSV for the full data.
Columns
| Column | Type | Categorical |
|---|---|---|
| Date | Date (YYYY-MM-DD) | No |
| Timestamp | Text | Yes |
| Update Timestamp | Text | Yes |
| Region | Text | Yes |
| Region Id | Text | Yes |
| Location Longitude | Numeric | Yes |
| Location Latitude | Numeric | Yes |
| Pm10 Twenty Four Hourly | Numeric | Yes |
| Pm10 Sub Index | Numeric | Yes |
| Pm25 Twenty Four Hourly | Numeric | Yes |
| Pm25 Sub Index | Numeric | Yes |
| O3 Eight Hour Max | Numeric | Yes |
| O3 Sub Index | Numeric | Yes |
| Co Eight Hour Max | Numeric | Yes |
| Co Sub Index | Numeric | Yes |
| So2 Sub Index | Numeric | Yes |
| So2 Twenty Four Hourly | Numeric | Yes |
| No2 One Hour Max | Numeric | Yes |
| Psi Twenty Four Hourly | Numeric | Yes |
| Psi Three Hourly | Numeric | No |