Skip to main content

Water Chemicals Codex (1982) / Chapter Skim
Currently Skimming:

Description of the Codex
Pages 2-8

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.


From page 2...
... Sample preparation -- special procedures are noted where appropriate. In cases where the chemical added is not soluble in water, the analytical procedures apply to a leachate of that material as obtained under the conditions described.
Read the entire page →
From page 3...
... The toxicology subgroup of the committee supplied toxicological data on these subTABLE 1 Water Treatment Chemicals Included in this Codex Activated alumina Aluminum sulfate Ammonia Ammonium hydroxide Bentonite clay Calcium hydroxide Calcium hypochlorite Calcium oxide Carbon, activated, granular, and powder Carbon dioxide Chlorine Ferric chloride Ferric sulfate Ferrous sulfate Fluosilicic acid Potasium permanganate Sodium aluminate Sodium bicarbonate Sodium calcium magnesium polyphosphate, glassy Sodium carbonate Sodium chlorite Sodium fluoride Sodium hydroxide Sodium metabisulfite Sodium polyphosphate, glassy Sodium silicate Sodium silicofluoride Sodium tripolyphosphate Sodium zinc polyphosphate, glassy Sodium zinc potassium polyphosphate, glassy Sulfur dioxide Sulfuric acid Tetrasodium pyrophosphate
Read the entire page →
From page 4...
... o o oB x 01 10 to · u~ ~ to .
Read the entire page →
From page 5...
... .3 In general, the committee felt it would be appropriate to utilize the MCL in calculating the allowable contaminant level contributed by an impurity in a water treatment chemical, unless there was no current MCL for that impurity or where there was new information concerning either the toxicity of the contaminant or the current status of the MCL. In the case of lead, recent toxicological data are available that led the committee to recommend to the EPA that a lower MCL should be considered.
Read the entire page →
From page 6...
... If cases are found in which a contaminant may create additional health concern because of its radioactivity, RMIC values shall be calculated in accordance with radiation limits that appear in the Code of Federal Regulations.~ The RMIC levels are based upon information available to the committee. It is obviously impossible to recommend maximum impurities content levels for all possible unusual or unexpected impurities, the presence of which would depend upon method of manufacture and quality of raw material used.
Read the entire page →
From page 7...
... Epigenetic Effects Evidence for epigenetic effects was considered where appropriate. However, as in the case of carbon tetrachloride, sufficient data were not available to use epigenetic mechanisms as sole basis for determining minimum contaminant levels.
Read the entire page →

Key Terms

  • drinking water
  • analytical procedures
  • rmic values
  • treatment chemicals
  • treatment chemical

  • water regulations
  • sample preparation
  • glassy sodium
  • impurity content
  • national interim

  • toxicological data
  • safe drinking
  • contaminant level
  • analytical methods
  • interim drinking

  • sodium zinc
  • chemicals require
  • sulfate ammonia
  • conditions described
  • glassy sulfur

  • zinc potassium
  • snarl value
  • chlorite sodium
  • limit value
  • individual monographs

  • potassium polyphosphate
  • committee supplied
  • aluminum sulfate
  • analysis due
  • values represent


    • This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
    More information on Chapter Skim is available.