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  2. Freshwater environmental quality parameters - Wikipedia

    en.wikipedia.org/wiki/Freshwater_environmental...

    Coal mining is also a very significant source of Iron both in mine-waters and from stocking yards of coal and from coal processing. Long abandoned mines can be a highly intractable source of high concentrations of Iron. Low levels of iron are common in spring waters emanating from deep-seated aquifers and maybe regarding as health giving springs.

  3. Lead and Copper Rule - Wikipedia

    en.wikipedia.org/wiki/Lead_and_Copper_Rule

    EPA illustration of lead sources in residential buildings Infographic about lead in drinking water. The Lead and Copper Rule (LCR) is a United States federal regulation that limits the concentration of lead and copper allowed in public drinking water at the consumer's tap, as well as limiting the permissible amount of pipe corrosion occurring due to the water itself. [1]

  4. Contaminants of emerging concern - Wikipedia

    en.wikipedia.org/wiki/Contaminants_of_emerging...

    EPA manages a Contaminant Candidate List to review substances that may need to be controlled in public water systems. [35] EPA has also listed twelve contaminants of emerging concern at federal facilities, with ranging origins, health effects, and means of exposure. [36]

  5. Drinking water quality in the United States - Wikipedia

    en.wikipedia.org/wiki/Drinking_water_quality_in...

    These contaminants fall into two separate categories, acute and chronic effects. Acute effects occur within hours or days of the time that a person consumes a contaminant. [33] People can experience acute health effects from almost any contaminant if they are exposed to extraordinarily high levels (as in the case of a spill).

  6. Lead contamination in Washington, D.C., drinking water

    en.wikipedia.org/wiki/Lead_contamination_in...

    In June 2004, the EPA cited WASA for a "serious breach" of the law, including withholding six test results showing high lead levels in 2001, dropping half of the homes that had previously tested high for lead levels in subsequent testing, and avoiding homes known to be at high risk for contamination. [16]

  7. Cleaner water expected with new EPA run-off protections ... - AOL

    www.aol.com/cleaner-water-expected-epa-runoff...

    The downgrade was due to higher E. coli levels from stormwater run-off. Other factors, such as the threat of climate change leading to more droughts or heavier rains in the region, can also affect ...

  8. Drinking water quality standards - Wikipedia

    en.wikipedia.org/wiki/Drinking_water_quality...

    Drinking water standards include lists of parametric values, and also specify the sampling location, sampling methods, sampling frequency, analytical methods, and laboratory accreditation . In addition, a number of standards documents also require calculation to determine whether a level exceeds the standard, such as taking an average.

  9. Maximum contaminant level - Wikipedia

    en.wikipedia.org/wiki/Maximum_Contaminant_Level

    Maximum contaminant levels (MCLs) are standards that are set by the United States Environmental Protection Agency (EPA) for drinking water quality. [ 1 ] [ 2 ] An MCL is the legal threshold limit on the amount of a substance that is allowed in public water systems under the Safe Drinking Water Act (SDWA).

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