Clean Water Act discharge permit · NPDES MAG912127
100 NORTHERN AVENUE, Boston, MA: NPDES MAG912127 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 20Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
100 NORTHERN AVENUE, held by 100 Northern Ave, LLC, holds NPDES permit MAG912127. 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 (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | 100 NORTHERN AVENUE |
|---|---|
| Permittee as filed | 100 Northern Ave, LLC |
| NPDES ID | MAG912127 |
| 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 | Boston, MA 02210 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Charles River-Frontal Boston Harbor (HUC 010900010704) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 20Pollutants on file
- 20Under a numeric limit
- 20With a violation of any kind
- 8With 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 | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Cyanide, total [as CN] | 2 | 60 | 58 | June 30, 2026 | 4,000% over the limit |
| Copper, total recoverable | 2 | 48 | 46 | June 30, 2026 | 2,114% over the limit |
| Nitrogen, total [as N] | 2 | 16 | 14 | June 30, 2026 | 710% over the limit |
| Total Group I Polycyclic Aromatic Hydrocarbons | 2 | 9 | 7 | June 30, 2025 | 116% over the limit |
| pH | 2 | 7 | 5 | June 30, 2025 | |
| Nickel, total recoverable | 2 | 4 | 2 | January 31, 2025 | 205% over the limit |
| Lead, total recoverable | 2 | 4 | 2 | May 31, 2026 | 17% over the limit |
| Solids, total suspended | 1 | 2 | 1 | February 29, 2024 | 17% over the limit |
| Arsenic, total recoverable | 2 | 2 | 0 | ||
| Zinc, total recoverable | 2 | 2 | 0 | ||
| Antimony, total recoverable | 2 | 2 | 0 | ||
| Naphthalene | 2 | 2 | 0 | ||
| Total Group II Polycyclic Aromatic Hydrocarbons | 2 | 2 | 0 | ||
| Chromium, hexavalent tot recoverable | 2 | 2 | 0 | ||
| Turbidity | 1 | 1 | 0 | ||
| Chloride, total recoverable | 1 | 1 | 0 | ||
| Iron, total recoverable | 1 | 1 | 0 | ||
| Flow, in conduit or thru treatment plant | 1 | 1 | 0 | ||
| Solids, total dissolved [TDS] | 1 | 1 | 0 | ||
| Hydrocarbons, total petroleum | 1 | 1 | 0 |
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 MAG912127.
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
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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 MAG912127 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.