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Posted on: June 22, 2016

City Starts Well 4 Water Filtration

Issaquah is now pumping from Well 4, thanks to a new filtration system that removes perfluorochemicals, or PFCs, from the water before it enters the City’s distribution system.

Test results from mid-June show the system is working – there were no detections of PFCs from Well 4.

Issaquah participates in the Environmental Protection Agency's (EPA) unregulated monitoring program by performing additional tests on our drinking water.

During that testing, detections of PFCs, were found in Well 4, the City’s smallest well. In the winter of 2016, the City stopped running Well 4 until the filtration system was installed and tested.

Issaquah meets all standards set for safe drinking water.

Based on the latest science, the EPA recently released drinking water health advisories (which are not enforceable or regulated) on two PFCs, called PFOA and PFOS. Issaquah meets these advisories.

Meanwhile, more stringent testing has been conducted – even below levels defined by EPA as an actual detection – to better understand the potential sources of PFCs. All of Issaquah’s wells have tested below EPA’s detection threshold for PFCs.

Issaquah is also:

  • Working closely with the EPA and state Department of Health.
  • Continuing to test its water system.
  • Hiring independent experts, who are currently assessing the City's system and will recommend some potential next steps for the long term.

Learn more from our FAQs and test results.

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