Clean Water Act discharge permit · NPDES MAG912191

104 MAIN STREET, Watertown, MA: NPDES MAG912191 discharge permit, effluent exceedances, inspections, penalties

EffectivePermit status
MinorDischarger class
18Pollutants under a numeric limit
0Pollutants with an effluent exceedance

104 MAIN STREET, held by Baystate Engineering Corp, holds NPDES permit MAG912191. EPA’s file records it issued August 2, 2022 and expiring August 1, 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	104 MAIN STREET
Permittee as filed	Baystate Engineering Corp
NPDES ID	MAG912191
Permit status	Effective
Permit type	Coverage under a general permit
Discharger class	Minor discharger
Facility type	Not a publicly owned treatment works
Issued	August 2, 2022
Expiration date	August 1, 2027
Issuing agency	EPA Region 1
Address	Watertown, MA 02472
Receiving water impaired	303(D) Listed
Subwatershed	Charles River-Frontal Boston Harbor (HUC 010900010704)
NAICS	562910 – Remediation Services
SIC	4959 – Sanitary Services

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

18Pollutants on file
18Under a numeric limit
18With a violation of any kind
0With 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
pH	2	36
Nitrogen, total [as N]	2	36
Phosphorus, total [as P]	2	36
Cyanide, total [as CN]	2	36
Chloride, total recoverable	2	36
Arsenic, total recoverable	2	36
Nickel, total recoverable	2	36
Zinc, total recoverable	2	36
Lead, total recoverable	2	36
Copper, total recoverable	2	36
E. coli, colony forming units [CFU]	2	36
Turbidity	1	18
Solids, total suspended	1	18
Oil & Grease	1	18
Iron, total recoverable	1	18
Flow, in conduit or thru treatment plant	1	18
Solids, total dissolved [TDS]	1	18
Hydrocarbons, total petroleum	1	18

EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MAG912191.

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 MAG912191.

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 MAG912191 there.

Nearby on the register

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

This public-records page covers Clean Water Act discharge permit NPDES MAG912191 for 104 MAIN STREET in Watertown, MA, held by Baystate Engineering Corp, with EPA's file showing the permit as effective, issued August 2, 2022, and expiring August 1, 2027. The page lists 18 pollutants on file, 18 under a numeric limit, 18 with a violation of any kind, and 0 pollutants with an effluent exceedance.