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 IDR10C0H4

HAPPY VALLEY TOWN HOMES, Nampa, ID: NPDES IDR10C0H4 discharge permit, effluent exceedances, inspections, penalties

HAPPY VALLEY TOWN HOMES, held by SLW, LLC, holds NPDES permit IDR10C0H4, which discharges to Mason Creek. EPA’s file records it issued July 26, 2022 and expiring February 9, 2027.

HAPPY VALLEY TOWN HOMES, Nampa, Idaho: Coverage under a general permit IDR10C0H4, held by SLW, LLC; Construction stormwater; Effective; issued July 26, 2022, term to February 9, 2027; discharges to Mason Creek; New Single-Family Housing Construction [except For-Sale Builders].

Idaho holds 3,630 Construction stormwater coverages of this permit type in EPA’s file; 1,909 were issued before IDR10C0H4. SLW, LLC holds 2 permits in Idaho.

Other permits held by SLW, LLC

Coverages issued nearest IDR10C0H4

HAPPY VALLEY TOWN HOMES among its neighbors

EPA’s permit file holds 360 discharge permits in the Mason Creek subwatershed (HUC 170501140407), IDR10C0H4 among them. Its county holds 377, 2 of them major permits; IDR10C0H4 is a minor permit.

Other permits in the Mason Creek subwatershed (HUC 170501140407)

What the register holds for HAPPY VALLEY TOWN HOMES: its NPDES ID, its permit type and status, its dates, its address in Nampa, Idaho, its receiving water. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES IDR10C0H4.

Identity

Facility as filedHAPPY VALLEY TOWN HOMES
Permittee as filedSLW, LLC
NPDES IDIDR10C0H4
Permit statusEffective
Permit typeCoverage under a general permit
Discharger classMinor discharger
Facility typeNot a publicly owned treatment works
ProgramConstruction stormwater
IssuedJuly 26, 2022
Expiration dateFebruary 9, 2027
AddressNampa, ID 83687
Receiving waterMason Creek
SubwatershedMason Creek (HUC 170501140407)
NAICS236115 – New Single-Family Housing Construction [except For-Sale Builders]
SIC1521 – Single-Family Housing Construction

Effluent limits and exceedances

EPA’s limits and effluent violation files hold no pollutant row for NPDES IDR10C0H4.

Inspections, violations and enforcement

EPA’s single-event violation file, as loaded, holds no violation for NPDES IDR10C0H4.

Inspections

EPA’s inspection file holds no inspection for NPDES IDR10C0H4.

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 IDR10C0H4.

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, IDR10C0H4.

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

Among the 308 storm water construction permits in Canyon County, 0.0% have a violation on file. HAPPY VALLEY TOWN HOMES sits in the Mason Creek subwatershed, which counts 360 NPDES permits, and 90.0% of the 269 Canyon County permits were issued before this permit.