Clean Water Act discharge permit · NPDES MAR1004GZ
INTERSTATE 495 (NB&SB) AT INTERSTATE 90 (EB&WB) INTERCHANGE IMPROVEMENTS, Hopkinton, MA: NPDES MAR1004GZ discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
INTERSTATE 495 (NB&SB) AT INTERSTATE 90 (EB&WB) INTERCHANGE IMPROVEMENTS, held by MassDOT, holds NPDES permit MAR1004GZ. EPA’s file records it issued February 1, 2023 and expiring February 16, 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 INTERSTATE 495 (NB&SB) AT INTERSTATE 90 (EB&WB) INTERCHANGE IMPROVEMENTS: its NPDES ID, its permit type and status, its dates, its address in Hopkinton, Massachusetts. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MAR1004GZ.
Identity
| Facility as filed | INTERSTATE 495 (NB&SB) AT INTERSTATE 90 (EB&WB) INTERCHANGE IMPROVEMENTS |
|---|---|
| Permittee as filed | MassDOT |
| NPDES ID | MAR1004GZ |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Construction stormwater |
| Issued | February 1, 2023 |
| Expiration date | February 16, 2027 |
| Issuing agency | U.S. EPA |
| Address | Hopkinton, MA 01748 |
| Subwatershed | Headwaters Sudbury River (HUC 010700050101) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 0Pollutants on file
- 0Under a numeric limit
- 0With a violation of any kind
- 0With an effluent exceedance
EPA’s limits and effluent violation files hold no pollutant row for NPDES MAR1004GZ.
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 MAR1004GZ.
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, MAR1004GZ.
Start the watch
- One permit holder — $99/month
- One watershed — $2,990/year
- One state — $4,990/year
- The whole register — $18,000/year
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 MAR1004GZ there.
Nearby on the register
- Discharge permits in Hopkinton
- Every permit record in Hopkinton, 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.