News from the Gilbert Lake Association, Brainerd, MN, USA
 
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March 3, 2021:  We received 32 responses to the chloride survey by residents on Gilbert Lake, but would like to get as many as possible. 
Here is what we know so far: https://www.surveymonkey.com/results/SM-9XJXPL9K9/ 

If you didn't respond to this the first time, please take a few minutes to complete the survey.  Survey link: https://www.surveymonkey.com/r/QHGM2VR

 



February 2, 2021: 
Gilbert Lake Chlorine Study

In 2019, Crow Wing County and Crow Wing Soil & Water Conservation District teamed-up to begin chloride water sampling.  Monitoring has encompassed seven Crow Wing County lakes along Crow Wing County roads.  The goal is to monitor the long-term effects of applying road salt.  The initial data indicates low, safe chloride levels ranging from 2.88 milligrams per liter (mg/L) to 15.5 mg/L. 

Gilbert Lakes chloride levels were the highest, around 15.5 mg/L.  We want to investigate further into what might be contributing to the higher chloride levels.  Alicia Overbo conducted a study in Minnesota in 2019 and found that 72% of the state population softens their household water.  Household water softeners contributed 132,500 tons of chloride annually.  If we divide 132,500 tons by the population in Minnesota softening water, household salt used averaged 25 lb salt per household per month. 

The EPA found that more than “four billion gallons of wastewater are dispersed below the ground’s surface every day”.  Groundwater that is contaminated by poorly or untreated household wastewater poses a threat to drinking water and to the environment.  Malfunctioning septic systems release bacteria, viruses, and chemicals toxic to local waterbodies.  When these pollutants are released into the ground, they eventually enter streams, rivers, lakes.  This can cause harm to local aquatic ecosystems by killing native aquatic plants, and fish.  To learn more about water softening and septic systems check out the resources below. 


Crow Wing County would like as many as possible to respond to this Chloride Survey for Gilbert Lake.  Survey link: https://www.surveymonkey.com/r/QHGM2VR

Resources: 

Chloride 101 Minnesota Pollution Control Agency

U of M Chloride Study 2019 

U of M Water Resources Center: Residential Softening

EPA: Septic Smart Homeowners

     
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