Historical Pollutant Standards Index (PSI) (2019)
What this data shows
Published by National Environment Agency. 50,298 records. Fields include Date, Timestamp, Update Timestamp, Region (20 columns in total). Covers 2019-01-01 to 2019-12-31. Last updated 2025-04-16.
Description
National Environment Agency CSV of historical Pollutant Standards Index (PSI) readings for Singapore covering the whole of 2019. Each record carries an ISO 8601 timestamp in Singapore Time, the reporting region with its coordinates, 24-hour and three-hour PSI values, and the underlying sub-indices for PM10, PM2.5, ozone, carbon monoxide, sulphur dioxide, and nitrogen dioxide. Air quality and haze researchers use it for time-series and regional comparisons, noting that records may be incomplete and are not quality-controlled climate data.
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
- 2019-01-01 – 2019-12-31
- Rows
- 50,298
- 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2019-01-01 | 2019-01-01T00:00:00+08:00 | 2019-01-01T00:03:52+08:00 | south | rSO | 103.820000 | 1.295870 | 18.000000 | 18.000000 | 9.000000 | 36.000000 | 10.000000 |
| 2019-01-01 | 2019-01-01T00:00:00+08:00 | 2019-01-01T00:03:52+08:00 | north | rNO | 103.820000 | 1.418030 | 17.000000 | 17.000000 | 8.000000 | 35.000000 | 6.000000 |
| 2019-01-01 | 2019-01-01T00:00:00+08:00 | 2019-01-01T00:03:52+08:00 | east | rEA | 103.940000 | 1.357350 | 23.000000 | 23.000000 | 9.000000 | 36.000000 | 4.000000 |
| 2019-01-01 | 2019-01-01T00:00:00+08:00 | 2019-01-01T00:03:52+08:00 | central | rCE | 103.820000 | 1.357350 | 15.000000 | 15.000000 | 8.000000 | 31.000000 | 11.000000 |
| 2019-01-01 | 2019-01-01T00:00:00+08:00 | 2019-01-01T00:03:52+08:00 | west | rWE | 103.700000 | 1.357350 | 16.000000 | 16.000000 | 6.000000 | 25.000000 | 12.000000 |
| 2019-01-01 | 2019-01-01T00:00:00+08:00 | 2019-01-01T00:03:52+08:00 | national | NRS | 0.000000 | 0.000000 | 23.000000 | 23.000000 | 9.000000 | 36.000000 | 12.000000 |
| 2019-01-01 | 2019-01-01T01:00:00+08:00 | 2019-01-01T01:03:52+08:00 | south | rSO | 103.820000 | 1.295870 | 18.000000 | 18.000000 | 9.000000 | 36.000000 | 8.000000 |
| 2019-01-01 | 2019-01-01T01:00:00+08:00 | 2019-01-01T01:03:52+08:00 | north | rNO | 103.820000 | 1.418030 | 18.000000 | 18.000000 | 9.000000 | 36.000000 | 5.000000 |
| 2019-01-01 | 2019-01-01T01:00:00+08:00 | 2019-01-01T01:03:52+08:00 | east | rEA | 103.940000 | 1.357350 | 23.000000 | 23.000000 | 8.000000 | 35.000000 | 4.000000 |
| 2019-01-01 | 2019-01-01T01:00:00+08:00 | 2019-01-01T01:03:52+08:00 | central | rCE | 103.820000 | 1.357350 | 15.000000 | 15.000000 | 8.000000 | 32.000000 | 9.000000 |
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 |