Historical Pollutant Standards Index (PSI) (2018)
What this data shows
Published by National Environment Agency. 50,454 records. Fields include Date, Timestamp, Update Timestamp, Region (20 columns in total). Covers 2018-01-01 to 2018-12-31. Last updated 2025-04-16.
Description
National Environment Agency historical Pollutant Standards Index (PSI) readings for Singapore throughout 2018, with ISO 8601 timestamps in Singapore Time. Columns cover regional PM10, PM2.5, O3, CO, SO2, NO2, and 24-hour and 3-hour PSI. Environmental researchers reconstruct 2018 haze and air-quality episodes; the file may contain gaps and is 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
- 2018-01-01 – 2018-12-31
- Rows
- 50,454
- 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2018-01-01 | 2018-01-01T00:00:00+08:00 | 2018-01-01T00:06:18+08:00 | south | rSO | 103.820000 | 1.295870 | 15.000000 | 15.000000 | 7.000000 | 29.000000 | 12.000000 |
| 2018-01-01 | 2018-01-01T00:00:00+08:00 | 2018-01-01T00:06:18+08:00 | north | rNO | 103.820000 | 1.418030 | 16.000000 | 16.000000 | 8.000000 | 33.000000 | 19.000000 |
| 2018-01-01 | 2018-01-01T00:00:00+08:00 | 2018-01-01T00:06:18+08:00 | east | rEA | 103.940000 | 1.357350 | 21.000000 | 21.000000 | 10.000000 | 41.000000 | 22.000000 |
| 2018-01-01 | 2018-01-01T00:00:00+08:00 | 2018-01-01T00:06:18+08:00 | central | rCE | 103.820000 | 1.357350 | 13.000000 | 13.000000 | 7.000000 | 28.000000 | 13.000000 |
| 2018-01-01 | 2018-01-01T00:00:00+08:00 | 2018-01-01T00:06:18+08:00 | west | rWE | 103.700000 | 1.357350 | 12.000000 | 12.000000 | 5.000000 | 20.000000 | 10.000000 |
| 2018-01-01 | 2018-01-01T00:00:00+08:00 | 2018-01-01T00:06:18+08:00 | national | NRS | 0.000000 | 0.000000 | 21.000000 | 21.000000 | 10.000000 | 41.000000 | 22.000000 |
| 2018-01-01 | 2018-01-01T01:00:00+08:00 | 2018-01-01T01:06:19+08:00 | south | rSO | 103.820000 | 1.295870 | 15.000000 | 15.000000 | 7.000000 | 28.000000 | 14.000000 |
| 2018-01-01 | 2018-01-01T01:00:00+08:00 | 2018-01-01T01:06:19+08:00 | north | rNO | 103.820000 | 1.418030 | 16.000000 | 16.000000 | 8.000000 | 32.000000 | 20.000000 |
| 2018-01-01 | 2018-01-01T01:00:00+08:00 | 2018-01-01T01:06:19+08:00 | east | rEA | 103.940000 | 1.357350 | 21.000000 | 21.000000 | 10.000000 | 40.000000 | 24.000000 |
| 2018-01-01 | 2018-01-01T01:00:00+08:00 | 2018-01-01T01:06:19+08:00 | central | rCE | 103.820000 | 1.357350 | 13.000000 | 13.000000 | 7.000000 | 28.000000 | 15.000000 |
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 |