Discharge from metal Trichloroethylene (TCE) 5 0 degreasing sites and (ppb) other factories Leaks and spills from gasoline and petroleum Toluene (ppm) 1 1 storage tanks; discharge from petroleum factories Leaching from PVC Vinyl Chloride (ppb) 2 0 piping; discharge from plastics factories Leaks and spills from gasoline and petroleum storage tanks; discharge Xylenes (ppm) 10 10 from petroleum factories; discharge from chemical factories Radioactive Contaminants Gross Alpha (pCi/l) Erosion of natural 15 0 deposits (minus uranium) GrossBeta/photon Decay of natural and 50 0 emmiters (pCi/L) man-made deposits ▲ MCL for beta particles is 4 mrem/year. EPA considers 50 pCi/L to be the level of concern for beta particles. ▲The Radium 226 & 228 (pCi/L) Erosion of natural 5 0 (combined values) deposits Erosion of natural Uranium (ppb) 30 0 deposits Disinfectants and Disinfection By-Products Highest quarterly Trihalomethanes Quarterly Byproduct of drinking running Range 80 N/A (TTHMs) (ppb) in (year) chlorination annual average Highest quarterly Haloacetic Acids (HAA5) Quarterly Byproduct of drinking running 60 N/A (ppb) in (year) disinfection annual average Highest quarterly Chlorine (ppm) Monthly in additive used to running Range 4 4 (year) control microbes (free, total or combined) annual average Highest quarterly Monthly in Byproduct of drinking Bromate (ppb) running Range 10 0 (year) water disinfection annual average Highest Monthly in Monthly Byproduct of drinking Chlorite (ppm) Range 1 0.8 (year) Set water disinfection Average
Trichloroethylene (TCE) (ppb) 5 0 Discharge from metal degreasing sites and other factories Toluene (ppm) 1 1 Leaks and spills from gasoline and petroleum storage tanks; discharge from petroleum factories Vinyl Chloride (ppb) 2 0 Leaching from PVC piping; discharge from plastics factories Xylenes (ppm) 10 10 Leaks and spills from gasoline and petroleum storage tanks; discharge from petroleum factories; discharge from chemical factories Radioactive Contaminants Gross Alpha (pCi/l) (minus uranium) 15 0 Erosion of natural deposits GrossBeta/photon emmiters (pCi/L) ▲ 50 0 Decay of natural and man-made deposits ▲The MCL for beta particles is 4 mrem/year. EPA considers 50 pCi/L to be the level of concern for beta particles. Radium 226 & 228 (pCi/L) (combined values) 5 0 Erosion of natural deposits Uranium (ppb) 30 0 Erosion of natural deposits Disinfectants and Disinfection By-Products Trihalomethanes (TTHMs) (ppb) Quarterly in (year) Highest quarterly running annual average Range 80 N/A Byproduct of drinking chlorination Haloacetic Acids (HAA5) (ppb) Quarterly in (year) Highest quarterly running annual average 60 N/A Byproduct of drinking disinfection Chlorine (ppm) (free, total or combined) Monthly in (year) Highest quarterly running annual average Range 4 4 additive used to control microbes Bromate (ppb) Monthly in (year) Highest quarterly running annual average Range 10 0 Byproduct of drinking water disinfection Chlorite (ppm) Monthly in (year) Highest Monthly Set Average Range 1 0.8 Byproduct of drinking water disinfection