Marine Water Quality

The endless allure of seaside travel and diving adventures stems from Taiwan’s distinctive marine environment, shaped by its diverse coastal landscapes and expansive ocean waters. Whether it is the resource-rich offshore islands of Penghu and Lanyu, or the captivating northern and southern coastlines, the ocean is deeply woven into the daily lives of the island’s residents.


However, the chemical composition of seawater is highly complex and subject to numerous environmental and external influences. Regular monitoring of coastal and beach water quality helps us better understand the surrounding marine environment and ensures the safety of recreational and water usage activities.


Long-term monitoring not only reveals historical trends in water quality but also evaluates the effectiveness of pollution control efforts, providing critical insights for developing marine pollution prevention strategies. Taiwan’s marine water quality monitoring program began in 2002. Currently, monitoring is conducted across 20 coastal regions at a total of 105 sampling sites. In addition to marine and beach water quality data, monitoring results from the Environmental Protection Administration's river surveys, the Fisheries Agency's fishing port assessments, and the Nuclear Safety Commission's marine radiological monitoring are integrated to provide the public with comprehensive water quality information. Pure seawater, safe enjoyment!

Statistical Category
Marine Water Quality Statistics
County/City
County/City
Marine Water Quality Information for Coastal Counties and Cities

Taoyuan Coastal Waters

Guishan Island

2018/11/01 ~ 2018/11/01

Water Quality Compliance Rate

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%
Water Quality Exceedance Count

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Non-Compliant Parameters

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Monitoring Items
*If no measurements were taken or the values are unidentifiable, the chart below will appear blank. Please click the button below to download detailed data.

Explanation of Monitoring Data Values

  • When a measurement falls below the minimum reliable detection limit of the instrument, it is indicated as "< detection limit."
  • In data provided by other agencies, values below the minimum reliable detection limit may also be indicated as "ND" (Not Detected), meaning the concentration was too low to be measured.
  • If a value is shown as "-", it indicates that no measurement data are available.
Statistical Category Data Source:Ministry of Environment.
Marine Water Quality Statistics
County/City
County/City
Marine Water Quality Information for Coastal Counties and Cities

County/City

Monitoring Station

2018/11/01 ~ 2018/11/01

Monitoring Items
Source:Fisheries Agency, Ministry of Agriculture (MOA) and Taiwan International Ports Corporation, Ltd. (TIPC)
Marine Water Quality Information for Coastal Counties and Cities
Monitoring Station

2018/11/01 ~ 2018/11/01

Monitoring Items
Beach Water Quality by Coastal City/County

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Escherichia coli (E. coli)

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Colony-Forming Units per 100 Milliliters (CFU/100 mL)
Enterococci

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Colony-Forming Units per 100 Milliliters (CFU/100 mL)
Water Quality Classification

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