What do I put in my CCR if I have one unsatisfactory (positive) total coliform result, but all of the required follow-up samples were satisfactory?
The CCR regulation requires that any and all unsatisfactory samples be reported even if all required follow-up samples are satisfactory. The unsatisfactory result needs to be included in your data summary table along with its MCL, MCLG and typical source language (provided in WAC Chapter 246-290-72012). Having only one unsatisfactory sample is not a violation if the four immediate repeat samples plus the following month’s five samples all are satisfactory. In this case, you may want to explain in the text of your report that all follow-up samples were satisfactory and that one unsatisfactory sample does not necessarily represent a public health threat. (Note: If you collect fewer than 40 total coliform samples per month, the MCL is “1” for total coliform. The MCLG is “0”.
Related Questions
- What do I put in my CCR if I have one unsatisfactory (positive) total coliform result, but all of the required follow-up samples were satisfactory?
- If I get a repeat due to an unsatisfactory initial screen, does the child need a 3rd screen (a total of two satisfactory screens)?
- The bacteriological test for my well water came back positive for Total Coliform and/or E.Coli. What does this mean?
