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Ground Water & Drinking Water

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  2. 46756How can I get my tap water tested?
  3. 42523Is bottled water safer than tap water?
  4. 27019How long can bottled water be stored?
  5. 22731How can I find the phone number for my local water company?
  6. 22672How can I find out if my water system is in compliance and providing safe drinking water, other than contacting the water company?
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  2. 1/14/2015The Reduced Monitoring Table in paragraph 141.623 indicates that Ground Water systems serving less than 500 people are reduced to monitoring every third year. In the column describing monitoring locations, it states, “1 dual sample set per year if the highest TTHM and HAA5 measurements occurred at the same location and quarter.” This is contradictory for the monitoring frequency. Can systems that meet the reduced monitoring 40/30 criteria and had the highest TTHM and HAA5 measurements at the same location and quarter be reduced to Triennial monitoring or must they remain on annual monitoring?
  3. 1/14/2015An instrument manufacturer is recommending that we use a 0.20 micron filter to filter samples for methods EPA 300.1 and 300.0. Would this be acceptable as the method states a 0.45 micron filter for samples and a 0.2 micron filter for standards?
  4. 12/10/2014In the original method, prior to Rev. 1.0, I believe I read that two adjustment to the method can be made: the column and the detector. Is this true? Our laboratory would like to use LC-MS for the analysis of method 555 analytes. Can we do it?
  5. 12/9/2014What is the difference between organic and inorganic arsenic?
  6. 9/15/2014How do I calculate the 90th Percentile for Lead and/or Copper?
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