38573d6e_International_Joint_Commission__Delisting_Guideline
[BUI] RESTRICTIONS-DRINKING WATER CONSUMPTION-TASTE/ODOR PROBLEMS [Listing Guideline] When treated drinking water supplies are impacted to the extent that: 1)densities of disease-causing organisms or concentrations of hazardous or toxic chemicals or radioactive substances exceed human health standards, objectives or guidelines; 2) taste and odor problems are present; or 3) treatment needed to make raw water suitable for drinking is beyond the standard treatment used in comparable portions of the Great Lakes which are not degraded (i.e. settling, coagulation, disinfection). [Delisting Guideline] 
For treated drinking water supplies: 1) when densities of disease-causing organisms or concentrations of hazardous or toxic chemicals or radioactive substances do not exceed human health objectives, standards or guidelines; 2) when taste and odor problems are absent; and 3) when treatment needed to make raw water suitable for drinking does not exceed the standard treatment used in comparable portions of the Great Lakes which are not degraded (i.e. settling, coagulation, disinfection).
International Joint Commission
Delisting Guideline