Clean Water Act discharge permit · NPDES MO0004979
COLUMBIA MUNICIPAL POWER PLANT, Columbia, MO: NPDES MO0004979 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 32Pollutants under a numeric limit
- 15Pollutants with an effluent exceedance
COLUMBIA MUNICIPAL POWER PLANT, held by City of Columbia, holds NPDES permit MO0004979, which discharges to Bear Cr.. EPA’s file records it issued July 6, 2012 and expiring July 5, 2017. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | COLUMBIA MUNICIPAL POWER PLANT |
|---|---|
| Permittee as filed | City of Columbia |
| NPDES ID | MO0004979 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | July 6, 2012 |
| Expiration date | July 5, 2017 |
| Issuing agency | MODNR-Water Protection Program |
| Address | Columbia, MO 65201 |
| Receiving water | Bear Cr. |
| Subwatershed | Rocky Fork Creek (HUC 103001020706) |
| NAICS | 221112 – Fossil Fuel Electric Power Generation |
| SIC | 4911 – Electric Services |
| Other EPA IDs (FRS) | RCRA handler MOR000028365; ICIS-AIR source MO0000002901900002 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 148Pollutants on file
- 32Under a numeric limit
- 145With a violation of any kind
- 15With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant; the 60 with the most exceedances of 148 are shown.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Chlorine, total residual | 8 | 210 | 50 | September 30, 2018 | 3,275% over the limit |
| Solids, total suspended | 4 | 106 | 22 | September 30, 2019 | 2,253% over the limit |
| Copper, total recoverable | 6 | 100 | 14 | December 31, 2021 | 2,147,483,650% over the limit |
| pH | 4 | 98 | 14 | August 31, 2013 | |
| Chlorides + Sulfates | 8 | 97 | 13 | March 31, 2020 | 80% over the limit |
| Iron, total recoverable | 6 | 56 | 12 | September 30, 2019 | 235% over the limit |
| Chloride [as Cl] | 8 | 95 | 11 | February 29, 2020 | 118% over the limit |
| Bromoform | 0 | 5 | 3 | December 31, 2021 | 2,147,483,650% over the limit |
| Arsenic, total recoverable | 4 | 52 | 2 | December 31, 2021 | 2,147,483,650% over the limit |
| Polychlorinated biphenyls [PCBs] | 4 | 2 | 2 | December 31, 2017 | 2,147,483,650% over the limit |
| Chlorine, free available | 4 | 2 | 2 | April 30, 2014 | 114% over the limit |
| Iron, dissolved [as Fe] | 0 | 2 | 2 | December 31, 2007 | 30% over the limit |
| Oil and grease [soxhlet extr.] tot. | 8 | 85 | 1 | October 31, 2020 | 20% over the limit |
| Nickel, total recoverable | 4 | 11 | 1 | December 31, 2019 | 2,147,483,650% over the limit |
| Pass/Fail Static 48Hr Acute Ceriodaphnia dubia | 1 | 1 | 1 | December 31, 2015 | |
| Flow, in conduit or thru treatment plant | 4 | 164 | 0 | ||
| Cyanide, free [amenable to chlorination] | 2 | 80 | 0 | ||
| Temperature, water deg. fahrenheit | 0 | 80 | 0 | ||
| Selenium, total recoverable | 4 | 50 | 0 | ||
| Oxygen demand, chem. [high level] [COD] | 4 | 44 | 0 | ||
| Hardness, total [as CaCO3] | 4 | 40 | 0 | ||
| Zinc, total recoverable | 4 | 16 | 0 | ||
| Aluminum, total recoverable | 4 | 12 | 0 | ||
| Chromium, trivalent total recoverable | 4 | 12 | 0 | ||
| Thallium, total recoverable | 4 | 10 | 0 | ||
| Beryllium, total recoverable [as Be] | 4 | 10 | 0 | ||
| Cadmium, total recoverable | 4 | 10 | 0 | ||
| Lead, total recoverable | 4 | 10 | 0 | ||
| Antimony, total recoverable | 4 | 10 | 0 | ||
| Mercury, total recoverable | 4 | 10 | 0 | ||
| Chromium, hexavalent dissolved [as Cr] | 4 | 8 | 0 | ||
| Chromium, total recoverable | 0 | 4 | 0 | ||
| Silver total recoverable | 4 | 2 | 0 | ||
| Cyanide, total [as CN] | 0 | 2 | 0 | ||
| Asbestos | 0 | 2 | 0 | ||
| 1,2-Dichloropropylene | 0 | 2 | 0 | ||
| Dichlorobromomethane | 0 | 2 | 0 | ||
| Carbon tetrachloride | 0 | 2 | 0 | ||
| 1,2-Dichloroethane | 0 | 2 | 0 | ||
| Chloroform | 0 | 2 | 0 | ||
| Toluene | 0 | 2 | 0 | ||
| Benzene | 0 | 2 | 0 | ||
| .delta.-BHC | 0 | 2 | 0 | ||
| Acenaphthylene | 0 | 2 | 0 | ||
| Acenaphthene | 0 | 2 | 0 | ||
| Acrolein | 0 | 2 | 0 | ||
| Acrylonitrile | 0 | 2 | 0 | ||
| Anthracene | 0 | 2 | 0 | ||
| Benzo[k]fluoranthene | 0 | 2 | 0 | ||
| Benzo[a]pyrene | 0 | 2 | 0 | ||
| Bis[2-chloroethyl] ether | 0 | 2 | 0 | ||
| Bis[2-chloroethoxy]methane | 0 | 2 | 0 | ||
| Bis[2-chloroisopropyl] ether | 0 | 2 | 0 | ||
| Butyl benzyl phthalate | 0 | 2 | 0 | ||
| Chlorobenzene | 0 | 2 | 0 | ||
| Chlorodibromomethane | 0 | 2 | 0 | ||
| Chrysene | 0 | 2 | 0 | ||
| Diethyl phthalate | 0 | 2 | 0 | ||
| Dimethyl phthalate | 0 | 2 | 0 | ||
| 1,2-Diphenylhydrazine | 0 | 2 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 4Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| March 31, 2022 | Effluent Violations - Numeric effluent violation | ST6 |
| July 9, 2019 | Effluent Violations - Numeric effluent violation | ST6 |
| June 29, 2018 | Effluent Violations - Numeric effluent violation | ST6 |
| June 30, 2017 | Effluent Violations - Numeric effluent violation | ST6 |
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.