For Bangkok tap water, distinguish treated water from the raw water used to supply it. Salinity and water-quality reports may refer to different stages. A public station does not test the water at every tap.
Read the date and place on the test. Check what kind of water was tested and what the result means. A past test cannot tell you what is in the water here now. For a local warning, use the latest notice from the agency that covers the site.
Bangkok-metropolitan tap-water monitoring with residual chlorine, turbidity, conductivity, pH, chloride, and salinity across online stations. Strong for distribution quality within the MWA service area, not national tap-water coverage.
Access: Public online tap-water monitoring dashboard and related MWA open-data surfaces. Updates: Operational / near real time.
Bangkok canal and Chao Phraya urban water-quality source for WQI, BOD, dissolved oxygen, ammonia, and station context. It is useful for city trend pages but not a universal realtime swim-safety feed.
Access: Bangkok open-data dataset with WQI records and related Chao Phraya/canal monitoring context. Updates: Historical / annual or on dataset refresh, with some related city sensor pages updated more frequently.
Primary official source for Thailand surface-water quality, WQI, and public water-quality service guidance. Use it for national river and lake status, not as a universal realtime API.
Access: PCD water-quality pages, publications, and linked national datasets for surface-water monitoring and WQI. Updates: Monthly / quarterly / annual depending dataset.
Match any result to the named place, sample date, and type of water tested.