According to the municipal sewage regulations, substances that could adversely affect the stability of the public sewers should not enter into the system. Limiting regulations exist under [DWAM115-2:2013] for

• the pH value (6,5-10),

• for sulphates (600 mg SO₄^2-/l)

• for volatile lipophilic substances (300 mg/l)

• waste water temperature (max. 35° C).

Generally, municipalities and water utilities have by-laws specifying limitations on wastewater discharge. For example, refer to the City of Toronto’s sewer-use by law.