Assertion: arsenic | /r/HasProperty | inorganic contaminant - iocs
Facets:
Source sentences:
text: In the U.S. in 1975, under the authority of the Safe Drinking Water Act (SDWA), the U.S. Environmental Protection Agency determined the National Interim Primary Drinking Water Regulation levels of arsenic (inorganic contaminant - IOCs) to be 0.05 mg/L (50 parts per billion - ppb).