Page 27 - Salem Magazine Spring 2011
P. 27

    71. Carbon tetrachloride N < 0.5 ppb 0 5 Discharge from chemical plants and other industrial activities
    72. Chlorobenzene N < 0.5 ppb 100 100 Discharge from chemical and agricultural chemical factories
    73. o-Dichlorobenzene N < 0.5 ppb 600 600 Discharge from industrial chemical factories
    74. p-Dichlorobenzene N < 0.5 ppb 75 75 Discharge from industrial chemical factories
 75. 1,2 - Dichloroethane N < 0.5 ppb 0 5 Discharge from industrial chemical factories
        76. 1,1 - Dichloroethylene N < 0.5 ppb 7 7 Discharge from industrial chemical factories
 77. cis-1,2- Dichloroethylene
N < 0.5 ppb 70 70 Discharge from industrial chemicalfactories
  78. trans - 1,2 -Dichloroethylene
N < 0.5 ppb 100 100 Discharge from industrial chemical factories
        79. Dichloromethane N < 0.5 ppb 0 5 Discharge from pharmaceutical and chemical factories
    80. 1,2-Dichloropropane N < 0.5 ppb 0 5 Discharge from industrial chemical factories
    81. Ethylbenzene N < 0.5 ppb 700 700 Discharge from petroleum refineries
    82. Styrene N < 0.5 ppb 100 100 Discharge from rubber and plastic factories; leaching from landfills
    83. Tetrachloroethylene N < 0.5 ppb 0 5
Leaching from PVC pipes; discharge from factories and dry cleaners
84. 1,2,4 -Trichlorobenzene
N < 0.5 ppb 70 70 Discharge from textile-finishing factories
        85. 1,1,1 - Trichloroethane N < 0.5 ppb 200 200 Discharge from metal degreasing sites and other factories
    86. 1,1,2 -Trichloroethane N < 0.5 ppb 3 5 Discharge from industrial chemical factories
    87. Trichloroethylene N < 0.5 ppb 0 5 Discharge from metal degreasing sites and other factories
    88. TTHM
[Total trihalomethanes]
N 10-38 ppb 0 80 By-product of drinking water chlorination
    89. HAA5 [Haloacetic acids]
N 7-50 ppb n/a 60 By-product of drinking water chlorination
    90. Toluene N < 0.5 ppm 1 1 Discharge from petroleum factories
    91. Vinyl Chloride N < 0.5 ppb 0 2 Leaching from PVC piping; discharge from plastics factories
    92. Xylenes N < 0.5 ppm 10 10
Discharge from petroleum factories; discharge from chemical factories
                   Total Organic Carbon
 93. Total Organic Carbon
  N
  1.24 – 1.77
  ppm
  n/a
   Treatment Technique (see note #93)
   Naturally present in the environment
  Microbiological Contaminants:
(1) Total Coliform. Coliforms are bacteria that are naturally present in the environment and are used as an indicator that other, potentially-harmful, bacteria may be present.
(2) Fecal coliform/E.Coli. Fecal coliforms and E. coli are bacteria whose presence indicates that the water may be contaminated with human or animal wastes. Microbes in these wastes can cause short-term effects, such as diarrhea, cramps, nausea, headaches, or other symptoms. They may pose a special health risk for infants, young children, and people with severely compromised immune systems.
(3) Turbidity. Turbidity has no health effects. However, turbidity can interfere with disinfection and provide a medium for microbial growth. Turbidity may indicate the presence of disease-causing organisms. These organisms include bacteria, viruses, and parasites that can cause symptoms such as nausea, cramps, diarrhea, and associated headaches.
(4) Cryptosporidium. Pathogenic protozoa that is widely distributed in nonpotable water supplies. This organism can cause gastrointestinal illness (e.g. diarrhea, vomiting, cramps).
























































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