Water and hydrology

BMA canal water quality.

Bangkok canal and Chao Phraya urban water-quality layer for WQI, BOD, dissolved oxygen, ammonia, and station context. It is useful for city trend pages but not a universal realtime swim-safety feed.

Public Bangkok open-data dataset with WQI records and related Chao Phraya/canal monitoring context Free public open-data portal access Historical / annual or on dataset refresh, with some related city sensor pages updated more frequently Open source
Runtime role

Catalog only

Access class

Public

Access type

Bangkok open-data dataset with WQI records and related Chao Phraya/canal monitoring context

Free status

Free public open-data portal access

Cadence

Historical / annual or on dataset refresh, with some related city sensor pages updated more frequently

Last verified

2026-05-11

Access class note

Public web, file, catalog, or documented endpoint access with no paid gate implied in the source profile.

Used in layers

page reference only

Useful fields

waterbody, station, timestamp, parameter code, value, unit, method, quality flag, WQI/MWQI, salinity, pH, turbidity, DO, BOD, conductivity, residual chlorine, bacteria, heavy metals, source threshold

Reliability rating

Medium-high for discovery and context; operational reliability depends on endpoint stability.

Runtime truth

Runtime role

Catalog only

Production ready

Not yet

Entity scope

No runtime entity scope yet.

Observation scope

No live observation ingestion yet.

Decision scope

Not wired into active decisions yet.

Runtime note

Profiled in the atlas and public pages, but not yet connected to live graph computation.

How this helps travel recommendations

Turns water data into source-backed decisions about river condition, Bangkok tap-water confidence, raw-water salinity intrusion, beach caution, groundwater caveats, wastewater context, and whether a warning is really about tap, river, marine, or industrial water.

Endpoint and API notes

Bangkok canal and Chao Phraya urban water-quality layer for WQI, BOD, dissolved oxygen, ammonia, and station context. It is useful for city trend pages but not a universal realtime swim-safety feed.

Open the source endpoint or documentation. Return to the Thailand data atlas.

Developer reference

Best endpoint

Use PCD and Thaiwater for river and station observations, MWA/PWA for tap or raw-water dashboards, DGR for wells, PCD/DMCR for marine and coastal sampling, and standards pages separately for interpretation rather than observation.

Recommended refresh

Check weekly for change detection, but treat the official publication period as the real cadence.

Travel scoring role

Turns water data into source-backed decisions about river condition, Bangkok tap-water confidence, raw-water salinity intrusion, beach caution, groundwater caveats, wastewater context, and whether a warning is really about tap, river, marine, or industrial water.

Comparable / backup source

PCD, Thaiwater, MWA, PWA, DGR, BMA, DMCR, GISTDA, Copernicus Marine, MRC, DIW, Department of Health, and FDA.

Example request

# Source landing/download page; inspect linked resources before automation.
curl -L "https://data.bangkok.go.th/en/dataset/wqi-2561-2563"

Failure modes

  • There is no single all-water-quality Thailand API.
  • WQI and MWQI are not realtime safe-today feeds.
  • Tap water, raw water, groundwater, river water, marine water, wastewater, and industrial effluent use different thresholds and cadences.
  • Satellite proxies such as chlorophyll or turbidity do not prove microbiological swim safety.
  • Public industrial-effluent visibility is limited and often role-gated.
  • The same station can appear under different agency names, IDs, and coordinate precision.
  • Dashboard markup or public-page layout can change without notice.

Last checked and source confidence

Last checked: 2026-05-11.

Source confidence: Treat this profile as strongest for the exact role named above. It is weaker when the source is stretched into live availability, legal proof, or traveler-fit decisions it does not directly prove.