MCL |
Maximum Contaminant Level |
An MCL violation means a contaminant has been detected
above maximum contaminant level consistently in drinking water. MCL is
the highest level of contamination that the U.S. Environmental Protection
Agency (EPA) allows in drinking water. MCLs ensure that drinking water
does not pose a short-term or long-term health risk.
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MON |
Monitoring |
A MON violation is a violation of a monitoring requirement
or a reporting requirement associated with the monitoring. A monitoring
violation occurs when a public water system owner does not collect a required
sample. A reporting violation occurs when a public water system owner
does not report the result(s) to the state from a sample that was collected.
When a public water system's owner does not collect a required sample,
the violation is often referred to as a monitoring and reporting violation.
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SS |
Sanitary Survey |
An SS violation occurs when a public water system
owner does not complete a sanitary survey by a required date.
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PN |
Public Notice |
A PN violation occurs when a public water system
owner does not notify the public about another violation in a timely or
appropriate fashion.
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TT |
Treatment Technique |
A TT violation occurs when a public water system
owner fails to apply a prescribed treatment technique by the allotted
time. Actions that are classified as treatment techniques are broad. Examples
of TT violations include: failure to employ a certified operator, inadequate
removal of organic materials from raw water.
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RPT |
Reporting |
A RPT violation occurs when public water system
owners fail to report certain information. The RPT category does not include
the failure to report analytical results, which falls under the MON category.
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V/E |
Variance/ Exception |
A V/E violation is issued when a public water system
owner has been granted a variance* or an exemption** with a schedule of
activities and the PWS owner fails to carry out one or more of the scheduled
activities on time. |