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Clean Water Act discharge permit · NPDES MDR004004

ACKERMAN & BAYNES LLC, Baltimore, MD: NPDES MDR004004 discharge permit, effluent exceedances, inspections, penalties

ACKERMAN & BAYNES LLC, held by Ackerman & Baynes LLC, holds NPDES permit MDR004004. EPA’s file records it issued August 25, 2026 and expiring January 31, 2028. 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 ACKERMAN & BAYNES LLC: its NPDES ID, its permit type and status, its dates, its address in Baltimore, Maryland, and 2 pollutants under a numeric limit. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MDR004004.

Identity

Facility as filedACKERMAN & BAYNES LLC
Permittee as filedAckerman & Baynes LLC
NPDES IDMDR004004
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
IssuedAugust 25, 2026
Expiration dateJanuary 31, 2028
Issuing agencyMARYLAND DEPARTMENT OF THE ENVIRONMENT
AddressBaltimore, MD 21213
Other EPA IDs (FRS)RCRA handler MDD003084035; ICIS-AIR source MD0000002451002997

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

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
Nitrite + Nitrate total [as N]100
Zinc, total [as Zn]100

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MDR004004.

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 MDR004004.

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 MDR004004 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 NPDES permit MDR004004, held by ACKERMAN & BAYNES LLC in Baltimore, MD, which EPA's file lists as effective with a minor discharger class, issued August 25, 2026 and expiring January 31, 2028. The page reports 2 pollutants under a numeric limit and 0 pollutants with an effluent exceedance.