(c) Amounts in excess of the below standards are considered excessive:

1. (1) One milligram per liter (1 mg/L) – water to be used directly in contact with, or in the processing of, food and beverages;
2. (2) Five milligrams per liter (5 mg/L) – water for homes, institutions, municipalities, and industries;
3. (3) Ten milligrams per liter (10 mg/L) – water for sprinkler irrigation systems, industrial evaporative cooling systems, and any other use where a moderate amount of sediment is not especially harmful; and
4. (4) Fifteen milligrams per liter (15 mg/L) – water for flood-type irrigation.