We put together the following guide of frequently asked questions to explain why MSD must increase rates, what that means for you, and how those in need can apply for assistance programs. The following information covers the fiscal year 2026 rate increase, which was 3.9 percent in Jefferson County and 2 percent in Oldham County.
How much will my monthly bill increase?
Beginning September 1, 2025, the average Jefferson County monthly residential bill will increase by an estimated $3.11.
The average Oldham County monthly residential bill will increase by an estimated $1.57. The Oldham County rate increase is different because MSD is operating under a rate schedule set by the Oldham County Fiscal Court, which previously managed wastewater services in the county. Oldham County rates are currently higher than Jefferson County, but the two counties will eventually equal out in the future.
Why does MSD need to increase rates?
MSD provides three utility services — wastewater treatment, stormwater management and Ohio River flood protection — and each is critical to the community’s health and safety. Significant improvements to those systems are needed to continue to protect the community from system failures, hazardous sewer overflows and catastrophic flooding, as well as to ensure compliance with federal and state environmental standards.
Does MSD have assistance programs?
Yes! MSD has provided more than 10,000 customers rate assistance. To learn more or apply, visit LouisvilleMSD.org/PayMyBill
What does MSD do to minimize rate increases?
MSD actively seeks and procures alternative funding sources. A current example is that MSD has secured approximately $84 million in various government grants and low-interest and forgivable loans toward the $230 million cost to upgrade Paddy’s Run Flood Pumping Station, which will double its protection capacity.
Where are MSD’s projects located?
MSD completes projects across the three counties we serve: Jefferson, Bullitt and Oldham. Check out the interactive map below to explore current projects and learn more.
Currently, some key projects are:
- Paddy’s Run Flood Pumping Station: This facility protects more than 216,000 people and $34 billion in property. The $230 million replacement project at Paddy’s Run will double pumping capacity. Completion is expected in spring 2027.
- Morris Forman Water Quality Treatment Center: Kentucky’s largest wastewater treatment facility, in operation since 1958, and now serving two-thirds of Louisville residents, is being modernized to sustainably produce Class A biosolids, meet stricter clean water regulations and create renewable energy. MSD is investing $83.5 million this budget year toward the total $285 million project. Completion is expected in 2028.
- Odor Control Improvements: As part of the $49 million clAIRity initiative, MSD is replacing hundreds of outdated catch basins in several neighborhoods — each costing between $15,000 and $20,000 — and installing new odor control systems at treatment and pump stations over the next five years.
