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Clean Water Act discharge permit · NPDES MOG491362

ESS MATERIALS, LLC, Columbia, MO: NPDES MOG491362 discharge permit, effluent exceedances, inspections, penalties

ESS MATERIALS, LLC, held by ESS Materials, LLC, holds NPDES permit MOG491362, which discharges to Tributary To Troy Newman Lake 2. 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 (September 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedESS MATERIALS, LLC
Permittee as filedESS Materials, LLC
NPDES IDMOG491362
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramIndustrial stormwater
IssuedJune 1, 2022
Expiration dateApril 30, 2027
AddressColumbia, MO 65201
Receiving waterTributary to Troy Newman Lake 2
SubwatershedHeadwaters Cedar Creek (HUC 103001021002)

Cited to the EPA ICIS-NPDES permit file (ECHO download).

Effluent limits and exceedances

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 measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
pH21816June 30, 2026
Solids, total suspended21414June 30, 20264,586% over the limit
Solids, settleable244December 31, 20251,160% over the limit
Flow, in conduit or thru treatment plant240
Oil and grease [soxhlet extr.] tot.200

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

DateWhat EPA recordedAgency
January 8, 2026Reporting Violations - Failure to submit required report (non-DMR non-pretreatment)ST6
December 17, 2025Effluent Violations - Numeric effluent violationST6
March 28, 2025Effluent Violations - Numeric effluent violationST6
June 28, 2024Effluent Violations - Numeric effluent violationST6
June 28, 2024Reporting Violations - Improper/ Incorrect ReportingST6
September 29, 2023Effluent Violations - Numeric effluent violationST6
September 29, 2023Permit Violations - Violation Specified in CommentST6
June 30, 2023Effluent Violations - Numeric effluent violationST6

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, MOG491362.

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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 MOG491362 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 14, 2026.