Carver County, Minnesota: drinking water report. Carver County southwest of the Twin Cities has about 106,000 residents in growing communities like…
Carver County southwest of the Twin Cities has about 106,000 residents in growing communities like Chanhassen, Chaska, and Waconia. Most drinking water comes from groundwater wells tapping the Prairie du Chien-Jordan and deeper aquifer systems. The county is transitioning from agricultural to suburban land use, and both legacies show up in the groundwater.
Nitrate from agricultural activity persists in Carver County's shallow aquifer even as farmland converts to housing. According to the Minnesota Department of Health's 2024 well monitoring data, 8% of private wells tested in the county exceeded the nitrate MCL of 10 mg/L, concentrated in the sandy outwash areas of the western part of the county.
The Minnesota Pollution Control Agency's 2024 PFAS investigation found detections in one Carver County public water system at 9 ppt combined – below the proposed state standard but above background levels. The contamination source is not definitively identified, though the Flying Cloud Airport in neighboring Eden Prairie and diffuse urban sources are suspected contributors.
Carver County's rapid suburbanization means water infrastructure varies widely – newer developments are typically on municipal supply with modern treatment, while older rural properties may still rely on private wells that predate current water quality awareness.
Check your water for data at your address. For private well owners, annual nitrate testing is a baseline. Our water filter guide covers systems appropriate for Minnesota groundwater, from simple carbon filters to reverse osmosis for comprehensive protection. Pull your detailed report for trends, and visit our Minnesota page for statewide data.
Drinking water is one exposure route. These federal datasets also cover Carver County, MN.
The EPA places Carver County, MN in Zone 1 - the EPA's highest-risk category, where the predicted average indoor radon level is above 4 pCi/L. Zone maps predict an area's radon potential from geology and existing indoor readings; they say nothing about a specific house. Testing is the only way to know your own level.
26% of homes in Carver County, MN were built before 1980, and 9% before 1950. Residential lead paint was banned in 1978, so housing age is the strongest available proxy for lead-paint exposure. This describes the county's housing stock, not any one home.
Modelled annual fine-particle pollution (PM2.5) in Carver County, MN averages 6.5 µg/m³, within the EPA's annual standard of 9 µg/m³. These are CDC modelled county estimates rather than readings from a specific monitor.
How radon zones work · Air quality by county · Lead exposure guide