Clean Water Act discharge permit · NPDES MO0004855
HAWTHORN GENERATING STATION, Kansas City, MO: NPDES MO0004855 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MajorDischarger class
- 31Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
- 0Inspections on file
- 0Formal enforcement actions
HAWTHORN GENERATING STATION, held by Evergy, Inc., holds NPDES permit MO0004855, which discharges to Tributary To Blue R.. EPA’s file records it issued January 18, 2022 and expiring January 31, 2027. 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 | HAWTHORN GENERATING STATION |
|---|---|
| Permittee as filed | Evergy, Inc. |
| NPDES ID | MO0004855 |
| Permit status | Effective |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Industrial stormwater |
| Issued | January 18, 2022 |
| Expiration date | January 31, 2027 |
| Address | Kansas City, MO 64120 |
| Receiving water | Tributary to Blue R. |
| Subwatershed | Buckeye Creek-Missouri River (HUC 103001010301) |
| NAICS | 221112 – Fossil Fuel Electric Power Generation |
| SIC | 4911 – Electric Services |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download.
Effluent limits and exceedances
- 34Pollutants on file
- 31Under a numeric limit
- 6With a violation of any kind
- 3With 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.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| pH | 10 | 11 | 11 | April 30, 2026 | |
| Thermal Discharge | 0 | 170 | 8 | December 31, 2002 | 46% over the limit |
| Solids, total suspended | 9 | 7 | 7 | June 30, 2011 | 1,930% over the limit |
| Oil and grease [soxhlet extr.] tot. | 9 | 568 | 0 | ||
| LC50 Static 48Hr Acute Pimephales promelas | 0 | 47 | 0 | ||
| Pass/Fail Static 48Hr Acute Ceriodaphnia dubia | 0 | 46 | 0 | ||
| Flow, in conduit or thru treatment plant | 22 | 0 | 0 | ||
| Selenium, total recoverable | 9 | 0 | 0 | ||
| Temperature, water deg. fahrenheit | 8 | 0 | 0 | ||
| Nitrogen, ammonia total [as N] | 8 | 0 | 0 | ||
| Nitrite + Nitrate total [as N] | 8 | 0 | 0 | ||
| Phosphorus, total [as P] | 8 | 0 | 0 | ||
| Thallium, total recoverable | 8 | 0 | 0 | ||
| Cadmium, total recoverable | 8 | 0 | 0 | ||
| Lead, total recoverable | 8 | 0 | 0 | ||
| Nitrogen, Kjeldahl, total [TKN] [water] | 8 | 0 | 0 | ||
| Mercury, total recoverable | 8 | 0 | 0 | ||
| Aluminum, total recoverable | 7 | 0 | 0 | ||
| Copper, total recoverable | 7 | 0 | 0 | ||
| Chloride [as Cl] | 6 | 0 | 0 | ||
| Chlorine, total residual | 6 | 0 | 0 | ||
| Chlorides + Sulfates | 6 | 0 | 0 | ||
| Sulfate, total [as SO4] | 4 | 0 | 0 | ||
| Chromium, hexavalent dissolved [as Cr] | 4 | 0 | 0 | ||
| Chromium, trivalent total recoverable | 4 | 0 | 0 | ||
| Toxicity [chronic], Ceriodaphnia dubia | 3 | 0 | 0 | ||
| Toxicity [chronic], Pimephales promelas [Fathead Minnow] | 3 | 0 | 0 | ||
| Flow rate | 2 | 0 | 0 | ||
| Sulfate [as S] | 2 | 0 | 0 | ||
| Aluminum, total [as Al] | 2 | 0 | 0 | ||
| Temp. diff. between intake and discharge | 2 | 0 | 0 | ||
| Oxygen demand, chem. [high level] [COD] | 1 | 0 | 0 | ||
| Toxicity [acute], Ceriodaphnia dubia | 1 | 0 | 0 | ||
| Toxicity [acute], Pimephales promelas [Fathead Minnow] | 1 | 0 | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES MO0004855.
Inspections
EPA’s inspection file holds no inspection for NPDES MO0004855.
Formal enforcement and penalties
0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.
Informal enforcement
EPA’s informal enforcement file holds no action for NPDES MO0004855.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
Watch this permit
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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID MO0004855 there.
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Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.