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Posted on: August 26, 2022

FLWCC Public Education to Help Reduce Chloride Levels in Treated Wastewater

FOX LAKE WASTEWATER CONTROL COMMISSION                      (920) 928-2020

W11276 COUNTY ROAD AA  FOX LAKE, WISCONSIN 53933                             


August 23, 2022

Dear City of Fox Lake and Fox Lake Inland Lake Protection and Rehabilitation District Resident,

In an April 11, 2022 inspection of the Fox Lake Wastewater Control Commission (FLWCC) Wastewater Treatment Facility, the Wisconsin Department of Natural Resources (WDNR) voiced concerns over the chloride levels in the treated final effluent discharge from the wastewater treatment facility.  The WDNR has asked the FLWCC to provide public education to customers to help reduce chloride levels in our treated wastewater.

High chloride levels typically originate in residential water softeners which are outdated, in poor condition, or are regenerating too frequently.  As a result, excess chloride concentrations are discharged to the wastewater treatment facility.  Because chloride removal in the wastewater treatment process is extremely difficult and costly, wastewater treatment facilities do not typically have equipment in place to remove chlorides.  Experience shows that the most cost-effective way to reduce chloride from the effluent discharge is to reduce chloride at the source – and that means residential water softeners.  

In summary, we need your help to make sure your water softeners are operating properly.  Furthermore, if you have the means to replace an old, timer-based unit with a newer style demand-based unit, please do so!  If you have questions regarding a suitable replacement, look for a model that indicates “demand-based regeneration” or “low salt usage”.  In fact, most, if not all softeners currently available for purchase nowadays are demand-based.  Some are simply more efficient than others.   A more efficient softener will save you money down the road in terms of salt usage also.

We appreciate your cooperation to help improve the performance of our treatment system and to protect our beautiful, local water resources. If you have any questions, please feel free to contact us.

Thank you,

Fox Lake Wastewater Control Commission


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