UV disinfection: wastewater treatment plants in Missouri
311 plants · 46% of the state · 371 MGD reported by 298 plants
Klarifi identifies 311 publicly owned wastewater treatment plants with uv disinfection in Missouri, 46% of the 671 plants in the state (371 MGD reported by 298 plants). The largest is Metropolitan St. Louis Sewer District Lemay WWTP in St. Louis at 105.45 MGD.
Ultraviolet disinfection destroys pathogens in the final effluent without chemicals or a chlorine residual. It has replaced chlorine at many plants since the 2000s and needs lamp, ballast and sleeve replacement on a fixed cycle, which keeps these plants in the market for UV suppliers.
The largest plants with UV disinfection in Missouri
| # | Facility | City | Avg flow (MGD) | NPDES permit | Expires | Violations (3y) |
|---|---|---|---|---|---|---|
| 1 | Metropolitan St. Louis Sewer District Lemay WWTP | St. Louis | 105.45 | MO0025151 | Aug 2031 | 6 |
| 2 | Little Blue Valley Sewer District | Independence | 39.13 | MOL101087 | Dec 2030 | 14 |
| 3 | St. Joseph Water Protection Facility | Saint Joseph | 20.69 | MO0023043 | Nov 2025 | 4 |
| 4 | Joplin Turkey Creek WWTP | Joplin | 9.49 | MO0103349 | Sep 2022 | 65 |
| 5 | O' Fallon Wastewater Treatment Plant | O'Fallon | 7.55 | MO0028720 | Sep 2031 | 0 |
| 6 | Jefferson City Rwrf | Jefferson City | 7.03 | MO0094846 | Mar 2025 | 0 |
| 7 | Shoal Creek Wastewater Treatment Facility | Joplin | 5.66 | MO0023256 | Mar 2023 | 11 |
| 8 | St Peters Pws | Saint Peters | 5.65 | MO0030970 | Dec 2024 | 0 |
| 9 | Cape Girardeau WWTP | Cape Girardeau | 5.39 | MO0136328 | Jun 2024 | 0 |
| 10 | Springfield NW WWTP | Springfield | 5 | MO0103039 | Jul 2025 | 0 |
Plants planning uv disinfection upgrades
These plants report uv disinfection as a planned process in the EPA Clean Watersheds Needs Survey: the earliest public signal of a project.
| Facility | City | Avg flow (MGD) | NPDES permit | Expires |
|---|---|---|---|---|
| Kirksville WWTP | Kirksville | 2.71 | MO0049506 | Dec 2027 |
| Bismarck Pws | Bismarck | 2.33 | MO0022942 | Mar 2031 |
| Harrisonville Pws | Harrisonville | 1.2 | MO0028070 | May 2027 |
| Parma Pws-Parma - Treatment Plant | Parma | 1.1 | MO0039900 | Oct 2027 |
| Eldon WWTP | Eldon | 0.85 | MO0100676 | Dec 2024 |
| Cabool WWTF | Cabool | 0.83 | MO0026301 | Dec 2021 |
| Monroe City WWTP | Monroe City | 0.44 | MO0055379 | Mar 2024 |
| Higginsville South WWTF | Higginsville | 0.42 | MO0023108 | Sep 2027 |
| Wellsville Pws | Wellsville | 0.39 | MO0050695 | Dec 2023 |
| Windsor Southwest WWTF | Windsor | 0.37 | MO0047325 | Mar 2026 |
Contacts and project signals for every plant on this list
Klarifi adds verified decision-maker contacts, permit limits, discharge monitoring data and the capital projects planned in each city, filterable by technology, size and compliance record.
Other technologies in Missouri
UV disinfection in other states
UV disinfection in Missouri: 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: Tertiary treatment · Ozonation · WWTP · Inflow and infiltration · Sludge dewatering · all terms