Mean water quality index in Ghana 2012-2021

Published by
Doris Dokua Sasu,
Jan 18, 2024
In the 2021 water quality index (WQI) in Ghana, the mean score reached 58.2 points, representing a fairly good water quality. This was the highest score reported since 2012 when the WQI stood at 49.6 points. The index measures the quality of surface water, where, for instance, scores between 25 and 50 indicate poor quality of water, and scores greater than 80 represent good or unpolluted water. According to the source, the maximum value in 2021 was reached in the main Volta basin, at Kpong.

Average water quality index in Ghana from 2012 to 2021

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Source

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Release date

2022

Region

Ghana

Survey time period

2012 to 2021

Supplementary notes

According to the source, the minimum, maximum, and mean water quality index (WQI) are based on a WQI classification system expanded as follows:

  • Class I: More than 80 points (Good-unpolluted)
  • Class II: 50-80 points (Fairly good)
  • Class III: 25-50 points (Poor quality)
  • Class IV: Less than 25 points (Grossly polluted)

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