How do you pronounce 渣?

Q: How do you pronounce 渣? A: zaa1, e.g.

渣 (zaa1) — meaning, pronunciation, examples

渣 (zaa1, zhā) — residue; crumbs; scumbag; slag (in mining or smelting); dregs; scraps; refuse; sediment; lees

渣斗 (zaa2 dau2) — (adjective) useless; poor performance; incompetent
渣甸山 (zaa1 din6 saan1) — Jardine's Lookout, a mountain in Hong Kong
渣都冇 (zaa1 dou1 mou5) — to have nothing left, not even dregs
渣都冇得剩 (zaa1 dou1 mou5 dak1 sing6) — to have absolutely nothing left, not even dreg; to have lost everything [colloq…
渣 (zaa2) — of poor; weak; low; trashy quality
渣打銀行 (zaa1 daa2 ngan4 hong4) — Standard Chartered Bank