Velarion Records
Follow this permit Velarion Records emails you this permit’s record, cited to the public filing, and tells you when the register changes it. Free.
We’ll email you a link to confirm. The continuous daily watch on every change is the paid alert. Unsubscribe any time.
Also free: The Pay Desk, the weekly executive pay briefing.

Clean Water Act discharge permit · NPDES MAR041042

LEXINGTON MUNICIPAL SEPARATE STORM SEWER SYSTEM, Lexington, MA: NPDES MAR041042 discharge permit, effluent exceedances, inspections, penalties

LEXINGTON MUNICIPAL SEPARATE STORM SEWER SYSTEM, held by LEXINGTON MS4, holds NPDES permit MAR041042.

LEXINGTON MUNICIPAL SEPARATE STORM SEWER SYSTEM, Lexington, Massachusetts: Coverage under a general permit MAR041042, held by LEXINGTON MS4; Pending.

LEXINGTON MUNICIPAL SEPARATE STORM SEWER SYSTEM among its neighbors

EPA’s permit file holds 157 discharge permits in the Mystic River-Frontal Boston Harbor subwatershed (HUC 010900010502), MAR041042 among them. Its county holds 539, 13 of them major permits; MAR041042 is a permit EPA has not classed major or minor.

Other permits in the Mystic River-Frontal Boston Harbor subwatershed (HUC 010900010502)

What the register holds for LEXINGTON MUNICIPAL SEPARATE STORM SEWER SYSTEM: its NPDES ID, its permit type and status, its its address in Lexington, Massachusetts. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MAR041042.

Identity

Facility as filedLEXINGTON MUNICIPAL SEPARATE STORM SEWER SYSTEM
Permittee as filedLEXINGTON MS4
NPDES IDMAR041042
Permit statusPending
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
AddressLexington, MA 02420
SubwatershedMystic River-Frontal Boston Harbor (HUC 010900010502)

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES MAR041042.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES MAR041042.

Inspections

EPA’s inspection file holds no inspection for NPDES MAR041042.

Formal enforcement and penalties

0 formal actions, 0 of them with a penalty assessed. Federal and state penalties are separate figures from separate authorities and are shown as each was filed, never added together.

Informal enforcement

EPA’s informal enforcement file holds no action for NPDES MAR041042.

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, MAR041042.

Start the watch

How often?
  • 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

Nearby on the register

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

What this page shows

Across the 148 general permit coverages in Middlesex County, 13.5% hold a violation on file, and LEXINGTON MUNICIPAL SEPARATE STORM SEWER SYSTEM is included in that group. The Mystic River-Frontal Boston Harbor subwatershed, HUC 010900010502, has 157 NPDES permits, including this permit. EPA's NPDES register lists 148 general permit coverages in Middlesex County, including this permit.