Clean Water Act discharge permit · NPDES MAG912276
TOBIN MONTESSORI & DARBY VASSALL UPPER SCHOOLS, Cambridge, MA: NPDES MAG912276 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 34Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
TOBIN MONTESSORI & DARBY VASSALL UPPER SCHOOLS, held by Cambridge Department of Public Works, holds NPDES permit MAG912276. 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.
What the register holds for TOBIN MONTESSORI & DARBY VASSALL UPPER SCHOOLS: its NPDES ID, its permit type and status, its dates, its address in Cambridge, Massachusetts, and 34 pollutants under a numeric limit. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MAG912276.
Identity
| Facility as filed | TOBIN MONTESSORI & DARBY VASSALL UPPER SCHOOLS |
|---|---|
| Permittee as filed | Cambridge Department of Public Works |
| NPDES ID | MAG912276 |
| 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 | Cambridge, MA 02138 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Mystic River-Frontal Boston Harbor (HUC 010900010502) |
| Other EPA IDs (FRS) | RCRA handler MAR000584995; ICIS-AIR source MA0000002511904297 |
Cited to the EPA ICIS-NPDES permit file (ECHO download); cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 34Pollutants on file
- 34Under a numeric limit
- 0With 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 | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| pH | 2 | 0 | 0 | ||
| Nitrogen, total [as N] | 2 | 0 | 0 | ||
| Cyanide, total [as CN] | 2 | 0 | 0 | ||
| Chloride, total recoverable | 2 | 0 | 0 | ||
| Iron, total recoverable | 2 | 0 | 0 | ||
| Lead, total recoverable | 2 | 0 | 0 | ||
| Copper, total recoverable | 2 | 0 | 0 | ||
| Turbidity | 1 | 0 | 0 | ||
| Alkalinity, total [as CaCO3] | 1 | 0 | 0 | ||
| Solids, total suspended | 1 | 0 | 0 | ||
| Oil & Grease | 1 | 0 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 0 | 0 | ||
| Phosphorus, total [as P] | 1 | 0 | 0 | ||
| Magnesium, total recoverable | 1 | 0 | 0 | ||
| Sulfate, total [as SO4] | 1 | 0 | 0 | ||
| Fluoride, total [as F] | 1 | 0 | 0 | ||
| Arsenic, total recoverable | 1 | 0 | 0 | ||
| Barium, total recoverable | 1 | 0 | 0 | ||
| Nickel, total recoverable | 1 | 0 | 0 | ||
| Zinc, total recoverable | 1 | 0 | 0 | ||
| Aluminum, total recoverable | 1 | 0 | 0 | ||
| Chromium, total recoverable | 1 | 0 | 0 | ||
| Vanadium, total recoverable | 1 | 0 | 0 | ||
| Manganese, total recoverable | 1 | 0 | 0 | ||
| Acenaphthene | 1 | 0 | 0 | ||
| Anthracene | 1 | 0 | 0 | ||
| Pyrene | 1 | 0 | 0 | ||
| Flow, in conduit or thru treatment plant | 1 | 0 | 0 | ||
| Total Group I Polycyclic Aromatic Hydrocarbons | 1 | 0 | 0 | ||
| Total Group II Polycyclic Aromatic Hydrocarbons | 1 | 0 | 0 | ||
| Solids, total dissolved [TDS] | 1 | 0 | 0 | ||
| Bromide [as Br] | 1 | 0 | 0 | ||
| Acetone | 1 | 0 | 0 | ||
| Hydrocarbons, total petroleum | 1 | 0 | 0 |
EPA’s effluent violation file records no exceedance of a numeric limit for NPDES MAG912276.
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 MAG912276.
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
One permit holder, $99/month. Watch the register for one permit holder and the places and receiving waters tied to its permits. Choose “One permit holder” and enter this permit’s NPDES ID, MAG912276.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
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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 MAG912276 there.
Nearby on the register
- Discharge permits in Cambridge
- Every permit record in Cambridge, A to Z
- Discharge permits in Massachusetts
- Every permit record in Massachusetts, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.