Asia — what's coming

Japan's Ministry of Environment publishes water-hardness measurements at 1,500+ public utilities. Korea's K-Water has comparable coverage. Taiwan EPA covers all major cities. China's CEMC is partial (large urban areas only). SE Asia gets CAMS modeled air; hardness via geology synth. Flight density data is excellent throughout.

Source plan

• Hardness — JP MoE + KR K-Water + TW EPA + CN CEMC; geology fallback elsewhere
• Air — JP/KR/TW national stations + CAMS Global for the rest
• 5G — OpenCelliD per-MCC (440 JP, 450 KR, 466 TW, 460 CN, ...)
• Flights — OpenSky + ADS-B Exchange