Clean Water Act discharge permit · NPDES MIS410889
NATIONAL BLOCK COMPANY, South Lyon, MI: NPDES MIS410889 discharge permit, effluent exceedances, inspections, penalties
- EffectivePermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
NATIONAL BLOCK COMPANY, held by Patriot Ready-Mix, Inc., holds NPDES permit MIS410889. EPA’s file records it issued February 3, 2025 and expiring April 1, 2029. 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 NATIONAL BLOCK COMPANY: its NPDES ID, its permit type and status, its dates, its address in South Lyon, Michigan. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES MIS410889.
Identity
| Facility as filed | NATIONAL BLOCK COMPANY |
|---|---|
| Permittee as filed | Patriot Ready-Mix, Inc. |
| NPDES ID | MIS410889 |
| Permit status | Effective |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | February 3, 2025 |
| Expiration date | April 1, 2029 |
| Issuing agency | State |
| Address | South Lyon, MI 48178 |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | Inchwagh Lake (HUC 040900050109) |
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 MIS410889.
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 MIS410889.
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 MIS410889 there.
Nearby on the register
- Discharge permits in South Lyon
- Every permit record in South Lyon, A to Z
- Discharge permits in Michigan
- Every permit record in Michigan, A to Z
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.