Dakota County, Minnesota — New testing data released by Dakota County is shedding light on the presence of PFAS, commonly known as “forever chemicals,” in groundwater throughout the county, raising concerns for residents who rely on private wells for their drinking water.
County officials say PFAS were found in the vast majority of private drinking wells sampled over the past several years, while every environmental groundwater monitoring well tested also showed traces of the chemicals.
The findings are now available through a new public dashboard designed to help residents better understand potential contamination risks in their area.
PFAS Found in Most Wells Tested
Since 2018, Dakota County’s Environmental Resources Department has been collecting water samples from private wells as part of an effort to better understand groundwater quality.
According to county data, 114 private drinking wells were tested, and PFAS were detected in 94 of them.
Some of those wells contained levels that exceeded state and federal drinking water guidelines.
Officials also tested 27 environmental monitoring wells, which are used to track groundwater conditions rather than provide drinking water.
PFAS were detected in every one of those monitoring wells.
The chemicals have become a growing concern nationwide because they break down extremely slowly in the environment and can accumulate over time in water, soil, wildlife, and the human body.
New Dashboard Gives Residents Easier Access to Data
To help residents review the findings, Dakota County launched a new online dashboard that maps tested wells and highlights contamination levels.
The system identifies several of the most closely monitored PFAS compounds and indicates whether concentrations exceed current health recommendations.
According to county officials, the information has been publicly available for years, but the dashboard makes it significantly easier for residents to access and understand.
Valeria Neppl, Dakota County’s groundwater protection unit supervisor, said the goal is to help private well owners make informed decisions.
“If you are on a private well and you’re concerned about your water, this kind of gives you a chance to see what potentially could be in your area, determine what your risk are of PFAS or potentially other contaminants.”
Private Well Owners Encouraged to Consider Filtration
One of the wells showing elevated PFAS levels was located near a farm in rural Hastings.
Resident Janet Frandrup said her household uses a reverse osmosis filtration system, which is designed to reduce contaminants, including PFAS.
County officials say homeowners concerned about contamination have several treatment options available.
“The recommendation that we have is you could do something as simple as doing a granulated activated carbon filter,” Neppl said.
Experts note that treatment effectiveness can vary depending on the type and concentration of PFAS present in the water.
Municipal Systems Face Different Requirements
While the county dashboard focuses on private wells, public water systems are regulated separately through state and federal oversight.
The Minnesota Department of Health maintains a statewide PFAS dashboard for community water systems and continues monitoring public drinking water supplies.
According to state officials, more than 20 community water systems in Minnesota currently require treatment for elevated PFAS levels.
One of those communities is Robbinsdale, where crews are conducting additional investigations to identify potential contamination sources.
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Officials Continue Searching for Sources
Dakota County officials say ongoing testing serves an important role in helping identify where contamination may be originating.
The county has shared its findings with both the Minnesota Department of Health and the Minnesota Pollution Control Agency as broader investigations continue.
Officials emphasized that residents using municipal water systems receive water that must meet regulatory standards. However, private well owners are ultimately responsible for monitoring and treating their own water supplies.
“Municipal water… it’s tested. The Department of Health regulates that. They have to meet federal drinking water standards. But if you’re on a private well, really you’re responsible for your own system,” Neppl said.
As researchers continue studying PFAS contamination across Minnesota, the newly available data offers residents a clearer picture of groundwater conditions and the steps they may need to take to protect their drinking water.
Do you think more resources should be available to help private well owners test and treat their water? Share your thoughts respectfully in the comments below.