River Basin Pollution Monitoring

Data as of 2021

Proportion of river basins classified as clean, slightly polluted, or polluted based on 3 primary indicators of water pollution.

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Table

Proportion of River Basis by Status

River Basis by Status

How is this data produced?

The Department of Environment (DOE) is mandated to monitor the quality of environmental resources in Malaysia. As part of this mandate, the DOE monitors the water quality of rivers in Malaysia via a combination of manual and automated monitoring at over 1300 stations, covering nearly 700 rivers and 150 river basins. This dataset presents the results of this monitoring on an annual basis.

There are 3 primary water pollution indicators monitored by the DOE presented in this dataset:

  • Biochemical Oxygen Demand (BOD), which measures the amount of oxygen that microorganisms require to decompose organic matter in the water. High BOD levels indicate the presence of a large amount of organic pollution, which can deplete oxygen in the water, harming aquatic life.
  • Ammoniacal Nitrogen (NH₃-N), which is a measure of ammonia in the water primarily coming from agricultural runoff, sewage, and industrial discharges. High levels of ammoniacal nitrogen are toxic to fish and other aquatic organisms and can lead to the depletion of dissolved oxygen as it is broken down.
  • Suspended Solids (SS), which are tiny particles suspended in the water, including soil, silt, organic matter, and industrial waste. High concentrations of suspended solids can reduce water clarity, block sunlight for aquatic plants, and clog the gills of fish.

River basins are classified as clean, slightly polluted, or polluted based on Water Quality Index (WQI) values for each of these 3 indicators. For a deeper understanding of the methodology, please refer to the DOE's Environmental Quality Report.

What caveats I should bear in mind when using this data?

Publication(s) using this data

Metadata

Dataset description

Proportion of river basins classified as clean, slightly polluted, or polluted based on 3 primary indicators of water pollution.

Variable definitions
  • Date
  • Basins Monitored
  • Pollution Indicator
  • Pollution Status
  • Number of Basins
  • Proportion
Last updated:

01 Sept 2024, 12:00

Next update:

31 Dec 2024, 12:00

Data source(s)
  • JAS
License

This data is made open under the Creative Commons Attribution 4.0 International License (CC BY 4.0). A copy of the license is available Here.

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Data
Full Dataset (CSV)

Full Dataset (CSV)

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Full Dataset (Parquet)

Full Dataset (Parquet)

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Code

Connect directly to the data with Python.

# If not already installed, do: pip install pandas fastparquet import pandas as pd URL_DATA = 'https://storage.data.gov.my/environment/water_pollution_basin.parquet' df = pd.read_parquet(URL_DATA) if 'date' in df.columns: df['date'] = pd.to_datetime(df['date']) print(df)

Sample OpenAPI query

The following code is an example of how to make an API query to retrieve the data catalogue mentioned above. You can use different programming languages by switching the code accordingly. For a complete guide on possible query parameters and syntax, please refer to the official Open API Documentation.

import requests import pprint url = "https://api.data.gov.my/data-catalogue?id=water_pollution_basin&limit=3" response_json = requests.get(url=url).json() pprint.pprint(response_json)