1. Mgbasa, ịgwakọta na dosing nke coagulant, coagulant enyemaka na disinfectant na mmiri oru ngo.
2. Nkwadebe na dosing dị iche iche acid-base ngwọta.
3. Nkwadebe na dosing nke regeneration ngwọta na nro na desalting mmiri ọgwụgwọ.
4. Nkwadebe na dosing nke ikesa obi jụrụ mmiri àgwà stabilizer.