“The Missouri Department of Natural Resources has identified 23 drinking water systems in Missouri that have chronically failed to complete drinking water testing required by the department to ensure a safe water supply.
“The systems listed have at least three major monitoring violations in a 12-month period, with the most recent violations occurring in the third quarter of 2011. While failing to monitor does not necessarily mean the water is unsafe, routine testing by a facility is a crucial part of maintaining a safe water supply.
“The department requires all public water systems to test for bacteria at least once a month to verify these systems are providing safe drinking water to the public. The vast majority of community and non-community public water systems in Missouri complies with all monitoring requirements and meets all drinking water standards. Chronic violators are the exception rather than the rule. This current list of 23 systems represents less than one percent of the approximately 2,800 public drinking water systems in Missouri.
“Bacteriological testing can be the first step in identifying and correcting a problem. The next step is to investigate the cause of any bad samples and perform corrective action, such as disinfecting and flushing the system. When a public water system has a record of both failing to monitor and a history of exceeding contaminant levels, this may raise concerns about the unknown quality of the drinking water.”
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