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Clean Water Act discharge permit · NPDES CAZ467237

CONCORD READY MIX INC, Antioch, CA: NPDES CAZ467237 discharge permit, effluent exceedances, inspections, penalties

CONCORD READY MIX INC, held by Concord Ready Mix Inc, holds NPDES permit CAZ467237. EPA’s file records it issued February 2, 2016 and expiring June 30, 2020. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

What the register holds for CONCORD READY MIX INC: its NPDES ID, its permit type and status, its dates, its address in Antioch, California. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES CAZ467237.

Identity

Facility as filedCONCORD READY MIX INC
Permittee as filedConcord Ready Mix Inc
NPDES IDCAZ467237
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramIndustrial stormwater
IssuedFebruary 2, 2016
Expiration dateJune 30, 2020
Issuing agencyCA Waterboards
AddressAntioch, CA 94509
Receiving water impaired303(D) Listed
SubwatershedMarkley Canyon-San Joaquin River (HUC 180400030907)
Other EPA IDs (FRS)RCRA handler CAR000408401

Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES CAZ467237.

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

EPA’s single-event violation file, as loaded, holds no violation for NPDES CAZ467237.

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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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 CAZ467237 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.

What this page shows

This public-records page covers Clean Water Act discharge permit NPDES CAZ467237, held by CONCORD READY MIX INC in Antioch, CA, under the industrial stormwater program. The permit is administratively continued, with a Minor Discharger class, 0 pollutants under a numeric limit, and 0 pollutants with an effluent exceedance. The facts list no effluent or single-event violation for this permit.