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Environment

Historical 24-hr PSI

Data from Apr 2014 to Mar 2026

Last updated: 15 Apr 2026, 09:00 SGT

NEA (National Environment Agency)

Historical regional 24-hr PSI

Data explorer

Historical24hrPSI.csv (105.2K rows, 3.2 MB)

24hr Psi Text	North Text	South Text	East Text	West Text	Central Text
(Null)0.0%	(Null)0.0% 526.5% 535.8% 544.8% 554.4%	(Null)0.0% 526.5% 535.7% 544.9% 554.2%	(Null)0.0% 527.1% 536.5% 545.5% 554.8%	(Null)0.0% 525.7% 534.8% 544.3% 553.9%	(Null)0.0% 526.3% 535.7% 545.5% 554.8%
1/4/2014 1:00	55	54	54	58	54
1/4/2014 2:00	55	54	54	59	54
1/4/2014 3:00	55	55	54	60	55
1/4/2014 4:00	56	55	55	62	55
1/4/2014 5:00	57	55	56	63	56
1/4/2014 6:00	58	56	56	64	56
1/4/2014 7:00	59	57	57	65	57
1/4/2014 8:00	60	57	58	66	58
1/4/2014 9:00	59	57	58	66	59
1/4/2014 10:00	60	58	58	67	59

Column legend

Title	Column name	Data type	Unit of measure	Description
24hr Psi	24hr_psi	Text	-	-
North	north	Text	-	-
South	south	Text	-	-
East	east	Text	-	-
West	west	Text	-	-
Central	central	Text	-	-

Analyse this dataset with Colab Notebook

1. Copy this dataset ID: d_b4cf557f8750260d229c49fd768e11ed
2. Click on the button below

Sample OpenAPI query

This code can be used to test a sample API query. It retrieves the data catalogue of this dataset. For a complete guide on query parameters and syntax, please refer to the API documentation. Try it out on your browser to see the response schema.

import requests
          
dataset_id = "d_b4cf557f8750260d229c49fd768e11ed"
url = "https://data.gov.sg/api/action/datastore_search?resource_id="  + dataset_id 
        
response = requests.get(url)
print(response.json())

Citation

This dataset can be reused and cited in research publications.

National Environment Agency. (2020). Historical 24-hr PSI (2026) [Dataset]. data.gov.sg. Retrieved May 15, 2026 from https://data.gov.sg/datasets/d_b4cf557f8750260d229c49fd768e11ed/view

About this dataset

Contact

Maye_WOO@nea.gov.sg

Created on

31 Mar 2020

Licence

Free forever for personal or commercial use, under the Open Data Licence.

Agency

NEA (National Environment Agency)