Public water system · KY0560258
ActiveLouisville Water Company
At a glance
Louisville Water Company (PWSID KY0560258) is an active community water system in Jefferson County, Kentucky. It reports serving 806,997 people through 311,310 service connections. Its primary water source is surface water, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in October 2006.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
806,997
Service connections
311,310
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Louisville Water Company compare with other water systems in Jefferson County?
By EPA's size categories, Louisville Water Company is a very large system (more than 100,000 people). Jefferson County has 1 active public water system, and Louisville Water Company is the largest of them by population served. Its population served is roughly in line with the county average of 806,997 people per system, and accounts for 100% of the 806,997 people reported by systems filed under the county. Across Kentucky, the 437 active systems average 11,699 people each. Nationally, the average active community water system reports serving 6,703 people, so Louisville Water Company is about 120 times that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Kentucky has 371 active community water systems, 85% of the state's 437 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 135 Kentucky systems (31%) list surface water as their primary source.
Who owns and regulates Louisville Water Company?
EPA lists Louisville Water Company as privately owned. The KY state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 1 of the 1 active systems in Jefferson County (100%) are also privately owned.
Does Louisville Water Company have drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in October 2006. The violations listed here began between June 1998 and October 2006. By type: 9 monitoring and reporting, 2 contaminant level above the legal limit and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Cadmium (3 of them). EPA lists 12 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2006-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Carbon, totalcode 2920 | No | Resolved |
| 2004-06-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2001-09-01 | Monitoring and reportingMonitoring, Repeat Minor (TCR) · code 26 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2001-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 1999-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Cadmiumcode 1015 | No | Resolved |
| 1999-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Thalliumcode 1085 | No | Resolved |
| 1999-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Berylliumcode 1075 | No | Resolved |
| 1998-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Thalliumcode 1085 | No | Resolved |
| 1998-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Cadmiumcode 1015 | No | Resolved |
| 1998-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Berylliumcode 1075 | No | Resolved |
| 1998-06-22 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Berylliumcode 1075 | Yes | Resolved |
| 1998-06-22 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Cadmiumcode 1015 | Yes | Resolved |
The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Louisville Water Company: frequently asked questions
Who runs Louisville Water Company?
Louisville Water Company (PWSID KY0560258) is a community water system privately owned. It is regulated by the KY state drinking water program.
How many people does Louisville Water Company serve?
Louisville Water Company reports serving 806,997 people through 311,310 service connections in Jefferson County, Kentucky.
Where does Louisville Water Company get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Louisville Water Company have any drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in October 2006. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Louisville Water Company's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in October 2006. For current results, consult the system's annual water quality report, EPA ECHO, or the KY state drinking water program.
Where can I find Louisville Water Company's water quality report?
As a community water system, Louisville Water Company must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Louisville Water Company, PWSID KY0560258, Kentucky”, https://aquacensus.com/water-systems/kentucky/louisville-water-company-ky0560258 (data as of October 1, 2026).