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  2. Wastewater quality indicators - Wikipedia

    en.wikipedia.org/wiki/Wastewater_quality_indicators

    Wastewater quality indicators are laboratory test methodologies to assess suitability of wastewater for disposal, treatment or reuse. The main parameters in sewage that are measured to assess the sewage strength or quality as well as treatment options include: solids, indicators of organic matter, nitrogen, phosphorus, indicators of fecal ...

  3. Total dissolved solids - Wikipedia

    en.wikipedia.org/wiki/Total_dissolved_solids

    Total dissolved solids ( TDS) is a measure of the dissolved combined content of all inorganic and organic substances present in a liquid in molecular, ionized, or micro-granular ( colloidal sol) suspended form. TDS are often measured in parts per million (ppm). TDS in water can be measured using a digital meter.

  4. TDS Telecom - Wikipedia

    en.wikipedia.org/wiki/TDS_Telecom

    TDS Telecom is an American telecommunications company with headquarters in Madison, Wisconsin.It is a wholly owned subsidiary of Telephone and Data Systems Inc, and is the seventh-largest local exchange carrier in the U.S. TDS Telecom offers telephone, broadband Internet and television services to customers in 30 states and more than 900 rural and suburban communities, though it also serves ...

  5. Tax deduction at source - Wikipedia

    en.wikipedia.org/wiki/Tax_deduction_at_source

    Tax deduction at source (TDS) is an Indian withholding tax that is a means of collecting tax on income, dividends, or asset sales by requiring the payer (or legal intermediary) to deduct tax due before paying the balance to the payee (and the tax to the revenue authority). Under the Indian Income Tax Act of 1961, income tax must be deducted at ...

  6. Circular 230 - Wikipedia

    en.wikipedia.org/wiki/Circular_230

    "Circular 230 is a hybrid document containing the rules, regulations, ethical/conduct provisions, and disciplinary procedures that apply to those who practice before the IRS." [1] The rules in Circular 230 are codified as Title 31 of the Code of Federal Regulations , Subtitle A, Part 10 (31 C.F.R. Part 10).

  7. Conductivity (electrolytic) - Wikipedia

    en.wikipedia.org/wiki/Conductivity_(electrolytic)

    Conductivity (electrolytic) Conductivity or specific conductance of an electrolyte solution is a measure of its ability to conduct electricity. The SI unit of conductivity is siemens per meter (S/m). Conductivity measurements are used routinely in many industrial and environmental applications as a fast, inexpensive and reliable way of ...

  8. Telephone and Data Systems - Wikipedia

    en.wikipedia.org/wiki/Telephone_and_Data_Systems

    Telephone and Data Systems, Inc. is a Chicago -based telecommunications service company providing wireless products and services; cable and wireline broadband, TV and voice services; and hosted and managed services to approximately 6 million customers nationwide through its business units TDS Telecom and U.S. Cellular ( NYSE : USM) and OneNeck ...

  9. Restriction of Hazardous Substances Directive - Wikipedia

    en.wikipedia.org/wiki/Restriction_of_Hazardous...

    Replaced by. Directive 2011/65/EU, 3 January 2013 [1] Recast with new legislation. The Restriction of Hazardous Substances Directive 2002/95/EC ( RoHS 1 ), short for Directive on the restriction of the use of certain hazardous substances in electrical and electronic equipment, was adopted in February 2003 by the European Union.