WaterWorks Sulfate Check Detects 0-500 ppm (mg/L) of Sulfate in Water.
What is the EPA's stance on Sulfates in Drinking Water?
The United States Environmental Protection Agency has not established a (primary) maximum contaminant level for sulfates in drinking water because sulfates in water do not pose a serious threat to human health. Therefore drinking water distribution systems need not take action if routine testing detects elevated levels of sulfates in the water they produce.
Based on based on aesthetic effects (i.e., taste and odor), however, the USEPA established a secondary maximum contaminant level (SMCL) for sulfates in drinking water at 250 ppm (mg/L). The SMCL for sulfates in drinking water serves only as a guideline or standard for water producers and does not obligate them to take steps to reduce sulfate levels if they reach or exceed 250 part per million.
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