The City received verbal notice from the Minnesota Department of Health (MDH) in January, with a formal written notification dated January 30, 2023.

The level of radium reported in City water is based on an annual average of quarterly measurements made by MDH. The last measurement, made October 10, 2022, placed the annual average at 6.0 pico Curies per Liter (pCi/L), which is 0.6 pCi/L above the acceptable level for combined radium of 5.4 pCi/L.

The City has contracted with a chemist to take City water samples and make recommendations regarding operational changes in the water treatment process to lower radium levels as quickly as possible. These operational adjustments, including additional sampling and radium testing above and beyond MDH testing requirements, have already been implemented and are being monitored for effectiveness. 

The City of IGH Public Works Department is taking immediate action to lower radium levels in City water. Radium tests require 30 days to process due to the incubation period, so it will take several months of monitoring to confirm the effectiveness of the operational changes made to the water treatment process.

No. Boiling water does not remove radium.

The City is not recommending drinking bottled water. If you have a specific health concern, please consult your healthcare provider.

Yes. If you have a specific health concern, please consult your child’s healthcare provider, or you can visit the MDH website for more information at: www.health.state.mn.us/communities/environment/water/contaminants/radionuclides.html.

No. Carbon filters, such as Brita filters, are not recommended for removing radium. 

Some other water filters, such as reverse osmosis filters, are recommended for removing radium. Water customers that utilize home water treatment systems, such as water softening and distillation, are also likely reducing radium concentrations through these additional treatment processes. 

Yes. Radium must be ingested in high concentrations over extended periods of time (i.e., several years) to adversely affect health.

Yes. The City of IGH was one of the first in Minnesota to treat drinking water for radium using sand filtration. These filters have aged, and technology has improved since they were installed in 1998 and updated in 2006. The City has budgeted approximately $2 million to update the City’s water treatment plant in 2024, including updating its filtration systems to better address radium removal. Because the City has only one water treatment facility, it cannot take the facility completely off-line while the system is updated, requiring that the filter replacement occur in a phased manner to keep the water treatment facility operational.

Please visit the City’s website at www.ighmn.gov/waternotice for more information on the radium notice. This site contains additional resources for water consumers, including past IGH Consumer Confidence Reports, which are annual water quality reports issued by the City, links to more information about radium from the MDH, and details about an upcoming Community Meeting at IGH City Hall on February 28, 2023, at 6 p.m. 

Notices were sent to every property that receives water from the IGH water treatment facility. If you are a renter, your landlord might have received the notice for your address, or if you have a private well and do not use City water, you would not have received a notice. Additionally, some residents who receive a water bill from the City of IGH actually get their water from either the Eagan water treatment facility or the South St. Paul water treatment facility. In these cases, you would not have received a notice about radium levels in your water because your home or business does not get City of IGH water. 

To view the public notice, please visit www.ighmn.gov/waternotice, or email water@ighmn.gov with any questions. 

Private wells are not as deep as the aquifers from which the City sources its drinking water, and therefore the water in private wells comes from different ground strata. The City does not have data on radium levels in private wells on properties within the City of IGH. For more information on how you can test your private well water, please visit the Dakota County Water Testing website at: https://www.co.dakota.mn.us/Environment/WaterResources/WellsDrinkingWater/Pages/radium.aspx or the Minnesota Department of Health Well Testing website at: https://www.health.state.mn.us/communities/environment/water/wells/waterquality/index.html.