Wastewater treatment plants in Kentucky
195 facilities · 169 MGD combined flow
Klarifi tracks 195 publicly owned wastewater treatment plants in Kentucky with a combined average flow of 169 MGD, serving about 921,754 residents. 30 plants treat more than 1 MGD and 1 more than 10 MGD; 63 use lagoon systems and 4 have digesters or biogas infrastructure. The largest is Derek R Guthrie WQTC MSD in Louisville at 55.21 MGD. 19 NPDES permits expire this year and 19 next year.
Every plant below links to a profile with average and design flow, the NPDES permit and its expiry, a three-year compliance snapshot and the capital projects planned in its city. Treatment technology and verified contacts are shown with a free Klarifi account.
195 plant locations in Kentucky; dot size follows average flow. Boundaries: U.S. Census Bureau.
NPDES permits and renewals in Kentucky
Every plant discharges under an NPDES permit that is renewed every five years, usually with tighter limits. The renewal year is the year a plant budgets for upgrades.
Largest wastewater treatment plants in Kentucky
| Facility | City | Avg flow (MGD) | Design (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| Derek R Guthrie WQTC MSD | Louisville | 55.21 | 60 | KY0078956 | Apr 2031 | 16 |
| Rwra Max Rhoads WWTP | Owensboro | 7.68 | 15 | KY0020095 | Dec 2021 | 1 |
| Valley Creek Wastewater Treatment Plant | Elizabethtown | 6.45 | 13 | KY0022039 | Oct 2023 | 1 |
| Richmond Otter Creek STP | Richmond | 5.92 | 8 | KY0107107 | Dec 2030 | 4 |
| Strodes Creek STP | Winchester | 4.5 | 7.2 | KY0037991 | Sep 2026 | 1 |
| Hopkinsville Hammond Wood STP | Hopkinsville | 3.67 | 6 | KY0066532 | Sep 2030 | 2 |
| Bee Creek WWTP | Murray | 3.39 | 8.75 | KY0072761 | Sep 2028 | 2 |
| Berea Municipal Utilities WWTP | Berea | 3.37 | 4.3 | KY0079898 | Nov 2030 | 0 |
| London STP | London | 3.07 | 5 | KY0021270 | May 2030 | 19 |
| Morehead WWTP | Morehead | 2.83 | 5 | KY0052752 | Dec 2030 | 0 |
Treatment technology for each plant is shown with a free Klarifi account. Create one →
Kentucky plants by treatment technology
All 195 plants in Kentucky
Wastewater treatment in Kentucky: questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed October 26, 2026.
Wastewater terms: WWTP · POTW · MGD · NPDES permit · Significant industrial user · Biosolids · all terms
Cite this page
Journalists, researchers and educators are welcome to quote these figures. Please credit Klarifi as the source and link to this page.
Klarifi. “Wastewater treatment plants in Kentucky.” Updated October 26, 2026. https://klarifi.io/facilities/kentuckyNeed a custom cut of the data for a state, a county or a list of plants? Email info@klarifi.io.