Free Kentucky water report: PFAS & lead levels for every water system, worst-affected cities, and EPA violations. Check your ZIP.
Kentucky's drinking water serves approximately 4.5 million residents across a state that spans three distinct geographic regions, each with its own water profile. The Bluegrass region in central Kentucky – anchored by Louisville and Lexington – draws primarily from the Ohio River, the Kentucky River, and their tributaries. Eastern Kentucky, in the Appalachian coalfield region, relies on smaller surface water impoundments and groundwater from fractured rock aquifers. Western Kentucky taps the Ohio River, the Tennessee River system, and the deeper regional aquifers. The Kentucky Division of Water oversees roughly 500 public water systems, with Louisville Water Company being the largest, serving over 900,000 people in the metro area.
Kentucky's water quality challenges are layered: the Ohio River carries industrial legacy contamination from upstream cities in Pennsylvania, West Virginia, and Ohio. Coal mining – both active and abandoned – has left acid mine drainage and heavy metals in eastern Kentucky watersheds. And military installations along the Tennessee border have introduced PFAS contamination into the mix.
PFAS monitoring in Kentucky is still in its early stages, with the EPA's UCMR5 program providing the most systematic data to date. Detections have been confirmed in several community water systems, though Kentucky's PFAS picture is dominated by one site: Fort Campbell, which straddles the Kentucky-Tennessee border near Clarksville and Hopkinsville.
Fort Campbell's use of AFFF in firefighting training over decades has contaminated groundwater that feeds private wells and community systems on both sides of the state line. The Department of Defense has conducted sampling and provided bottled water to some affected residents, but the contamination plume extends beyond the areas currently being addressed.
Kentucky does not have state-specific PFAS MCLs and relies on federal EPA standards. The Kentucky Energy and Environment Cabinet has participated in regional PFAS investigations but has not proposed standalone state limits. The Ohio River, which supplies drinking water to a significant share of Kentucky's population, receives PFAS-containing discharges from upstream industrial and municipal sources – a diffuse contamination pathway that is harder to trace and address than a single point source.
Among Appalachian and Ohio River Valley states, Kentucky's PFAS profile is less severe than Ohio's or West Virginia's, both of which have major industrial PFAS contamination sites. The DuPont/Chemours Washington Works facility in Parkersburg, WV – just across the Ohio River – was the site of one of the most significant PFAS contamination events in US history, and downstream Kentucky communities received some of that contamination.
Kentucky's distinctive water quality issue is coal. The state has produced billions of tons of coal since the 19th century, and the environmental legacy includes over 15,000 miles of streams impaired by mining activity, according to Kentucky Division of Water assessments. Acid mine drainage – sulfuric acid leaching from exposed coal seams and mine waste – turns streams orange and kills aquatic life. While this is primarily a surface water ecology issue, it affects the source water available for treatment plants in eastern Kentucky.
Louisville Water Company's Ohio River intake is well upstream of the worst industrial discharge zones, and the utility has invested in advanced treatment including granular activated carbon, which provides some PFAS reduction as a side benefit of its primary purpose (taste and odor control).
Kentucky's water quality varies dramatically by region – what residents in Louisville face is fundamentally different from conditions in eastern Kentucky coal country or western Kentucky near Fort Campbell.
1. Check your specific location at the homepage. We map available monitoring data to your ZIP code. 2. Residents near Fort Campbell (Christian, Trigg, and Montgomery counties in KY) should check whether their well or water system has been tested for PFAS. Contact the local health department or KDEP if you are on a private well near the base. 3. Eastern Kentucky well owners should test for manganese, iron, and sulfate in addition to standard parameters – coal-region groundwater often carries elevated minerals that affect both safety and taste. 4. Review our water filter guide for filtration options appropriate to your specific contaminant profile. A detailed water report provides historical context for your area.
Kentucky's water history is shaped by three overlapping chapters: river commerce, coal extraction, and military operations.
The Ohio River has been a working waterway since the 18th century, and the communities along its banks have drawn drinking water from it for nearly as long. Louisville Water Company, established in 1860, was one of the earliest major municipal water utilities in the South. The utility pioneered several treatment innovations and today operates one of the more advanced surface water treatment plants in the Ohio River Valley.
Coal mining transformed eastern Kentucky beginning in the late 1800s, and its water quality impacts have been severe and long-lasting. Surface mining (strip mining and mountaintop removal) exposes sulfide minerals in coal-bearing rock, which oxidize on contact with air and water to produce sulfuric acid. This acid mine drainage then dissolves heavy metals – iron, manganese, aluminum, selenium – and carries them into streams. The Surface Mining Control and Reclamation Act of 1977 required reclamation of mined lands, but tens of thousands of acres mined before the act remain unreclaimed, and their drainage continues to impair waterways.
Fort Campbell, activated in 1942 as a World War II training camp, grew into one of the largest military installations in the country. Its firefighting training areas used AFFF for decades, and the resulting PFAS contamination has affected groundwater on both sides of the Kentucky-Tennessee border. The base's Environmental Management Division has been conducting investigation and remediation under DoD oversight, but community trust has been strained by the pace of response.
More recently, Kentucky has faced challenges with aging water infrastructure in rural areas. The state has one of the highest rates of water main breaks per capita in the nation, and many small systems lose 30-40% of their treated water to leaks before it reaches customers. The Kentucky Infrastructure Authority administers loan and grant programs to address these deficiencies, but the backlog of needed repairs runs into the billions of dollars.
Check your address to see available data for your location. In a state where geography determines your water challenges, local data is essential.