Fayette County, Kentucky: drinking water report. Fayette County is consolidated with the city of Lexington, making it Kentucky's second-largest metro area…
Fayette County is consolidated with the city of Lexington, making it Kentucky's second-largest metro area with about 323,000 residents. Kentucky American Water serves the county, drawing primarily from the Kentucky River and supplementing with Pool 9 of that river via the Richmond Road treatment plant. The Kentucky River drains a large watershed that includes coal country, agricultural land, and scattered industrial operations – each contributing different contaminants to the raw water before it reaches the treatment intake.
The Kentucky River watershed includes areas with active and abandoned coal mining, and bromide from coal-fired power plant discharges and brine from oil and gas operations has been documented in the river. According to the Kentucky Division of Water's 2024 assessment, bromide reacts with chlorine during treatment to form brominated disinfection byproducts, which are considered more toxic than their chlorinated counterparts. Kentucky American Water has reported elevated total trihalomethane levels during warm-weather months when organic loading increases.
The EPA's UCMR5 data shows PFAS detections in the Lexington system. The Blue Grass Army Depot in adjacent Madison County has confirmed PFAS contamination from munitions disposal and firefighting operations. A 2023 Kentucky DEP report found two water systems in the county with PFAS detections near the EPA's MCLs.
Disinfection byproducts tend to peak in summer in Fayette County when the Kentucky River carries higher organic loads and water temperatures rise. If your water tastes or smells strongly of chlorine during these months, a carbon filter will reduce both the taste and the byproducts.
Check your water for current data on your area. For PFAS, reverse osmosis is the stronger choice. Our water filter guide ranks systems by lab-tested removal rates. Pull your detailed report for seasonal trends, and see our Kentucky page for statewide context.
Drinking water is one exposure route. These federal datasets also cover Fayette County, KY.
The EPA places Fayette County, KY 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.
46% of homes in Fayette County, KY were built before 1980, and 10% 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 Fayette County, KY averages 8.1 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
4 public water systems serving Fayette County, KY have EPA lead testing on record. The reported lead sample skews toward systems that already flagged a problem, so its exceedance rate is not directly comparable with other areas. 2 water systems serving Fayette County, KY carry a health-based EPA Safe Drinking Water Act violation.
| Most-cited violation type | Systems affected |
|---|---|
| Lead and Copper Rule Revisions | 1 |
| Haloacetic Acids (HAA5) | 1 |
Source: EPA Lead and Copper Rule 90th-percentile tap sampling and EPA SDWIS Safe Drinking Water Act enforcement records, aggregated from the public water systems serving this county. Figures are counts of water systems, not a test of any individual home or tap.