Clean Water Act discharge permit · NPDES IDS028134
HIGHWAY DISTRICT NO. 4 MS4, Caldwell, ID: NPDES IDS028134 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
HIGHWAY DISTRICT NO. 4 MS4, held by CANYON HIGHWAY DISTRICT NO. 4 (MS4), holds NPDES permit IDS028134, which discharges to Boise River. EPA’s file records it issued August 28, 2009 and expiring October 14, 2014. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
What the register holds for HIGHWAY DISTRICT NO. 4 MS4: its NPDES ID, its permit type and status, its dates, its address in Caldwell, Idaho, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES IDS028134.
Identity
| Facility as filed | HIGHWAY DISTRICT NO. 4 MS4 |
|---|---|
| Permittee as filed | CANYON HIGHWAY DISTRICT NO. 4 (MS4) |
| NPDES ID | IDS028134 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Small municipal storm sewer systems |
| Issued | August 28, 2009 |
| Expiration date | October 14, 2014 |
| Address | Caldwell, ID 83607 |
| Receiving water | BOISE RIVER |
| Subwatershed | Outlet Boise River (HUC 170501140803) |
| SIC | 9199 – General Government |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same 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 IDS028134.
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 IDS028134.
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, IDS028134.
Start the watch
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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 IDS028134 there.
Nearby on the register
- Discharge permits in Caldwell
- Every permit record in Caldwell, A to Z
- Discharge permits in Idaho
- Every permit record in Idaho, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.