Clean Water Act discharge permit · NPDES WYR106526
CYS18 DATA CENTER, Cheyenne, WY: NPDES WYR106526 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MinorDischarger class
- 0Pollutants under a numeric limit
- 0Pollutants with an effluent exceedance
CYS18 DATA CENTER, held by Microsoft Corporation, holds NPDES permit WYR106526. EPA’s file records it issued November 14, 2023 and expiring August 1, 2025. 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 CYS18 DATA CENTER: its NPDES ID, its permit type and status, its dates, its address in Cheyenne, Wyoming. EPA’s effluent violation file and its single-event violation file hold no violation for NPDES WYR106526.
Identity
| Facility as filed | CYS18 DATA CENTER |
|---|---|
| Permittee as filed | Microsoft Corporation |
| NPDES ID | WYR106526 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Coverage under a general permit |
| Discharger class | Minor discharger |
| Facility type | Not a publicly owned treatment works |
| Program | Construction stormwater |
| Issued | November 14, 2023 |
| Expiration date | August 1, 2025 |
| Issuing agency | Wyoming Department of Environmental Quality |
| Address | Cheyenne, WY 82007 |
| Subwatershed | Upper Little Crow Creek (HUC 101900090301) |
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 WYR106526.
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 WYR106526.
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 WYR106526 there.
Nearby on the register
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Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.