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POST a CONCERN or COMMENT about allowable levels of impurities in drinking water Limits of allowed levels of water impurities: When testing drinking water the impurity limits noted here help in choosing when water filtration or other water treatment is required. This table supplies the allowable limitations of various contaminants discovered in drinking water.

Table of Allowable Limits of Water Impurities While the table of water contamination active ingredients and allowed levels is from New York State, these limits or comparable numbers will apply in many jurisdictions. More In-Depth and screening requirements in the U.S. are regulated by the Federal Clean Drinking Water act.

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New York City State does not regulate private drinking water products (single family homes on well water). Many lending institutions need a minimum of a confirmation of "drinkable" water meaning that germs count and coliform germs count is less than 1 CFU per 100 ml. of drinking water in the water test sample.

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Readers of this short article must also see Drinking Water system, Contamination Levels, Water Testing Treatments. Notes about drinking water pollutant appropriate levels (a) mg/L = milligrams per liter (b) If iron and manganese are present, the overall concentration of both needs to not go beyond 0. 5 mg/L. Water containing more than 20 mg/L of salt need to not be utilized for drinking by individuals of seriously restricted salt diets.

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(d) Color test result expressed as Platinum Cobalt Color Units (e) Smell test result expressed as Threshold Odor Number (f) If nitrate and nitrite exist, the total concentration of both ought to not go beyond 10 mg/L. (g) "Action level" is the concentration of lead or copper (in a sample of water drawn from a tap usually utilized for drinking after a 6-hour duration of no water use) that, when exceeded, activates actions to be taken by a water system.