Question

different measuresat house hold level for safe drinking water​

Answer 1

Answer:

National primary drinking water regulations (NPDWRs) List of drinking water contaminants and their maximum contaminant levels (MCLs)

...

National Secondary Drinking Water Regulations (NSDWRs)

Contaminant Secondary Standard

pH 6.5-8.5

Silver 0.10 mg/L

Sulfate 250 mg/L

Total Dissolved Solids