Velarion Records

Clean Water Act discharge permit · NPDES MIG760073

BIG BLUE SWIM SCHOOL - ANN ARBOR, Ann Arbor, MI: NPDES MIG760073 discharge permit, effluent exceedances, inspections, penalties

BIG BLUE SWIM SCHOOL - ANN ARBOR, held by MASSS, LLC, holds NPDES permit MIG760073, which discharges to Mallets Creek. EPA’s file records it issued June 7, 2023 and expiring April 1, 2025. 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 filedBIG BLUE SWIM SCHOOL - ANN ARBOR
Permittee as filedMASSS, LLC
NPDES IDMIG760073
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
IssuedJune 7, 2023
Expiration dateApril 1, 2025
Issuing agencyState
AddressAnn Arbor, MI 48103
Receiving waterMallets Creek
Receiving water impaired303(D) Listed
SubwatershedSwift Drain-Huron River (HUC 040900050402)
NAICS713940 – Fitness and Recreational Sports Centers
SIC7991 – Physical Fitness Facilities

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

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
pH2720
Flow, in conduit or thru treatment plant2720
Chlorination duration2720
Oxidants, total residual2600
Outfall observation,visual, y/n response1360
Bromine, reported as the element1300
Chlorine, total residual0180

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MIG760073.

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
April 21, 2026Reporting Violations - Late Submittal of DMRsST6
March 21, 2026Reporting Violations - Late Submittal of DMRsST6
February 21, 2026Reporting Violations - Late Submittal of DMRsST6
January 21, 2026Reporting Violations - Late Submittal of DMRsST6
November 21, 2025Reporting Violations - Late Submittal of DMRsST6
October 21, 2025Reporting Violations - Late Submittal of DMRsST6
September 21, 2025Reporting Violations - Late Submittal of DMRsST6
August 21, 2025Reporting Violations - Late Submittal of DMRsST6
July 21, 2025Reporting Violations - Late Submittal of DMRsST6
June 21, 2025Reporting Violations - Late Submittal of DMRsST6
May 21, 2025Reporting Violations - Late Submittal of DMRsST6
April 21, 2025Reporting Violations - Late Submittal of DMRsST6
March 21, 2025Reporting Violations - Late Submittal of DMRsST6
February 21, 2025Reporting Violations - Late Submittal of DMRsST6
January 21, 2025Reporting Violations - Late Submittal of DMRsST6
December 21, 2024Reporting Violations - Late Submittal of DMRsST6
November 21, 2024Reporting Violations - Late Submittal of DMRsST6
October 21, 2024Reporting Violations - Late Submittal of DMRsST6
September 21, 2024Reporting Violations - Late Submittal of DMRsST6
August 21, 2024Reporting Violations - Late Submittal of DMRsST6
July 21, 2024Reporting Violations - Late Submittal of DMRsST6
June 21, 2024Reporting Violations - Late Submittal of DMRsST6
May 21, 2024Reporting Violations - Late Submittal of DMRsST6
April 21, 2024Reporting Violations - Late Submittal of DMRsST6
March 21, 2024Reporting Violations - Late Submittal of DMRsST6
February 21, 2024Reporting Violations - Late Submittal of DMRsST6
January 21, 2024Reporting Violations - Late Submittal of DMRsST6
December 21, 2023Reporting Violations - Late Submittal of DMRsST6
November 21, 2023Reporting Violations - Late Submittal of DMRsST6
October 21, 2023Reporting Violations - Late Submittal of DMRsST6
September 21, 2023Reporting Violations - Late Submittal of DMRsST6
August 21, 2023Reporting Violations - Late Submittal of DMRsST6
July 21, 2023Reporting Violations - Late Submittal of DMRsST6

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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How we handle your data → Privacy

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 MIG760073 there.

Nearby on the register

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

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