District context and pest patterns
Shau Kei Wan and Sai Wan Ho are a different picture entirely — older tenement buildings sit alongside newer developments, with building age varying block by block. The mosquito data adds a story worth reading carefully: FEHD's monthly combined index at Chai Wan held at 0.0% to 0.8% from January through March 2026, then climbed clearly — 7.3% in April, 15.4% in May, 16.9% in June, still holding at 16.3% in July.
Shau Kei Wan and Sai Wan Ho went further: after 17.0% in May and an easing to 14.3% in June, July set a new high for the year at 19.6% — the joint fourth-highest reading in Hong Kong that month. Both readings point to the same thing: in hillside, green environments like Eastern District, standing water management is what keeps the numbers down.
In August 2026, Chai Wan recorded 12.2% and Shau Kei Wan and Sai Wan Ho 10.7%; these are survey-area readings, not figures for the whole Eastern District.