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Consumer Related Water Testing Questions
Do New York City residents receive free lead testing for their drinking water?
How can I get my tap water tested?
How can I tell if my water contains too much lead?
How do I have my water tested for lead?
I am attempting to understand the contaminant values I received after having my water tested. It uses different units of measurement than the EPA website does for the contaminants. How do I compare?
The drinking water I receive from a public water system has an unfamiliar odor and a slight discoloration. I am concerned that this is an indication of lead in my drinking water. What can I do to determine if lead is in my drinking water?
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General Laboratory Questions
Where can I find a list of EPA-approved turbidimeters?
How much does it cost to become a member of EPA's Water Laboratory Alliance?
Appendix B to 40 CFR Part 136 is proposed to be changed with the current MUR. How will this be applied to the SDWA? Some approved methods reference Appendix B of part 136 (example: OIA-1677 and HachTNTplus 835/836 Method 10206) will this change their MDL?
A public water system (PWS) must collect total coliform repeat samples within 24-hours of being notified of the positive results unless the state grants an extension due to logistical sample collection problems (40 CFR 141.21(b)(1)). How does EPA define l
Is my laboratory obligated to help out during a contamination incident if we are members of EPA's Water Laboratory Alliance?
I represent a laboratory interested in joining EPA's Water Laboratory Alliance (WLA). Is there a limit to the number of labs allowed per state?
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Laboratory Questions On Analytical Methods
I need clarification on what is considered to be acceptable remedial action for a laboratory fortified blank QC sample that does not meet the acceptance criteria of the reference EPA Method.
Are hold times meant to be to the minute of collection or day of collection? For example, for a 14 day holding time, would a sample collected at 10:30 expire at 10:30 on day 14 or at 23:59 on day 14?
When a LFB recovery fails the method acceptance criteria, must all samples prepared together in the same batch be re-prepared at all times, or only if the source of the failure is traced to a source other than the spiking of the sample?
Many of the SDWA chemistry methods list holding times in number of days. Are hold times meant to be to the minute of collection or day of collection?
Is Hygiena's MicroSnap test approved for drinking water testing? They claim AOAC validation but don't mention EPA certification.
A first draw sample is required when taking tap water samples for lead analysis. How does EPA define first draw sample?
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