Regulations last checked for updates: May 06, 2024

Title 40 - Protection of Environment last revised: Jun 26, 2024
§ 116.2 - Abbreviations.
ppm = parts per million mg = milligram(s) kg = kilogram(s) mg/l = milligrams(s) per liter= (approx.) ppm mg/kg = milligram(s) per kilogram= (approx.) ppm [43 FR 10474, Mar. 13, 1978]
authority: 33 U.S.C. 1251
cite as: 40 CFR 116.2