PlainWater
Counties → Kentucky

Jefferson County, Kentucky

Water Systems
1
Population Served
764,769
Total Violations
660
38 health-based
PFAS Detected
1
of 1 tested

Violation Analysis

100.0%
Systems with Violations
660.0
Avg Violations per System
5.8%
Health-Based Violations

Water Source Types

SW
1 system (100%)

PFAS Contamination

1
Systems Tested
1
PFAS Detected
100.0%
Detection Rate

PFAS (per- and polyfluoroalkyl substances) are persistent chemicals found in drinking water. The EPA has set enforceable limits for several PFAS compounds under UCMR5 monitoring.

Compliance Snapshot

Jefferson Kentucky water systems by violation status, EPA SDWIS records.

No violations on record (0) One or more violations (1)

Violation history is cumulative, many flagged systems have already returned to compliance. Detail pages show per-system context.

Water Systems

System Name Population Violations PFAS
Louisville Water Company 764,769 660 Detected

Other Counties in Kentucky

Fayette County
1 systems · 299,501 served · 30 violations
Kenton County
1 systems · 199,460 served · 674 violations
Warren County
2 systems · 144,719 served · 689 violations
Hardin County
4 systems · 136,859 served · 885 violations
Daviess County
5 systems · 112,731 served · 830 violations
Pulaski County
8 systems · 102,144 served · 931 violations

Drinking Water Guides

Frequently Asked Questions

How many water violations are in Jefferson County? ▼
Jefferson County has 660 total drinking water violations across 1 water systems, of which 38 are health-based violations. 100.0% of systems have at least one violation.
How many people get water from Jefferson County systems? ▼
Water systems in Jefferson County serve approximately 764,769 people through 1 public water systems.
Has PFAS been detected in Jefferson County water? ▼
Of 1 water systems tested for PFAS in Jefferson County, 1 had PFAS detected (100.0% detection rate).
What types of water sources supply Jefferson County? ▼
Water systems in Jefferson County use SW (1 systems) as their primary water sources.
Are health-based violations serious? ▼
Health-based violations indicate that drinking water exceeded Maximum Contaminant Levels (MCLs) set by the EPA or failed treatment technique requirements. 5.8% of Jefferson County's violations are health-based. Not all violations indicate immediate health risk, but they require corrective action.
Data Sources & Methodology

Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). PFAS testing data from the UCMR5 monitoring program. SDWIS tracks all public water systems regulated under the Safe Drinking Water Act.

Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations. Not all violations indicate an immediate health risk.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.