R 560.415 Secondary maximum contaminant levels.

Rule 415. If water sample analyses from a test well or on-site water supply well for a development site less than 1 acre in size or a subdivision detects a contaminant in a concentration that exceeds the secondary maximum contaminant level in Table 1, then the department shall disclose by means of recorded advisories according to R 560.426, the nature of the impact on drinking water quality. Table 1 Secondary Maximum Contaminant Levels Contaminant Secondary Maximum Contaminant Level in Milligrams Per Liter Chloride 250 Hardness (as calcium carbonate) 250 Iron 0.3 Sodium 250 Sulfate 250 Corrosivity Noncorrosive