Clean Water Act discharge permit · NPDES MOG490270
KIENSTRA READY MIX OF OFALLON, Ofallon, MO: NPDES MOG490270 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 5Pollutants under a numeric limit
- 3Pollutants with an effluent exceedance
KIENSTRA READY MIX OF OFALLON, held by Kienstra Ready Mix of OFallon, holds NPDES permit MOG490270, which discharges to Tributary To Belleau Creek. EPA’s file records it issued June 1, 2022 and expiring April 30, 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 | KIENSTRA READY MIX OF OFALLON |
|---|---|
| Permittee as filed | Kienstra Ready Mix of OFallon |
| NPDES ID | MOG490270 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Industrial stormwater |
| Issued | June 1, 2022 |
| Expiration date | April 30, 2027 |
| Address | Ofallon, MO 63366 |
| Receiving water | Tributary to Belleau Creek |
| Subwatershed | Lower Dardenne Creek (HUC 071100090105) |
| SIC | 3273 – Ready-Mixed Concrete |
| Other EPA IDs (FRS) | ICIS-AIR source MO0000002918300031 |
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
- 6Pollutants on file
- 5Under 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 | 2 | 11 | 7 | September 30, 2010 | |
| Solids, total suspended | 2 | 8 | 4 | June 30, 2008 | 301% over the limit |
| Oil and grease [soxhlet extr.] tot. | 2 | 6 | 2 | September 30, 2005 | 320% over the limit |
| Solids, settleable | 2 | 4 | 0 | ||
| Flow, in conduit or thru treatment plant | 2 | 2 | 0 | ||
| Storm water flow | 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
- 0Single-event violations
EPA’s single-event violation file, as loaded, holds no violation for NPDES MOG490270.
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.
Watch this permit
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MOG490270.
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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 MOG490270 there.
Nearby on the register
- Discharge permits in Ofallon
- Every permit record in Ofallon, A to Z
- Discharge permits in Missouri
- Every permit record in Missouri, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.