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Town Of Westminster Total Trihalomethanes - TTHMs

Government and Politics

August 5, 2022

From: Town Of Westminster

Total Trihalomethanes (TTHMs) are Above Drinking Water Standards 

This is an important notice - please translate it for anyone who does not understand English. 

This notice is to advise our customers that our water system is in noncompliance with the drinking water standards for Total Trihalomethanes (TTHMs).? Although this is not an emergency, as our customers, you have a right to know what happened, what you should do, and what we are doing to correct this situation. 

We are required to monitor the drinking water for TTHM levels on a quarterly basis (once every three months) at two specific locations in the distribution system. The sample results during the last quarter show that our system exceeded the standard or maximum contaminant level (MCL) for TTHMs at one out of two locations during the April through June 2022 compliance period. The standard for TTHMs is 80 parts per billion (ppb), and compliance is determined on a quarterly basis by averaging all samples collected at each location for the last 12 months (Running Annual Average). The locations and those averages are as follows (averages above the MCL have been highlighted): 

What does this mean? 

This is not an immediate risk.? If it had been, you would have been notified right away.?However, pregnant women, infants, and women of childbearing age may be at increased risk and should seek advice from their health care providers if they have any concerns. Some people who drink water containing (TTHMs) trihalomethanes in excess of the MCL over many years may experience problems with their liver, kidneys, or central nervous system, and may have an increased risk of getting cancer.? 

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