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Hexcel Corp. - SL Operations

Organic Fibers, Noncellulosic, West Valley City, Utah. NPDES permit UT0025305, in force until Jul 31, 2028. Last 12 months: over a limit once (last February 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 28 days after each period: form A monthly (8 values)
Renewal application due
Feb 2, 2028 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 12 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

Period endingParameterReportedLimitOver by
February 2026Nitrogen, ammonia total [as N], daily maximum28.6 mg/L≤ 21.7 mg/L32%

Limits in force (14)

ParameterStatisticLimitMonths
Flow ratemonthly maximumreport only (MGD)all year
pHdaily minimum≥ 6.5 SUall year
pHdaily maximum≤ 9 SUall year
Nitrogen, ammonia total [as N]30-day averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]maximum monthly average≤ 45.1 mg/LJul–Sep
Nitrogen, ammonia total [as N]maximum monthly average≤ 41.5 mg/LOct–Dec
Nitrogen, ammonia total [as N]maximum monthly average≤ 6.6 mg/LJan–Mar
Nitrogen, ammonia total [as N]maximum monthly average≤ 53.6 mg/LApr–Jun
Nitrogen, ammonia total [as N]daily maximum≤ 151.7 mg/LJul–Sep
Nitrogen, ammonia total [as N]daily maximum≤ 94.8 mg/LOct–Dec
Nitrogen, ammonia total [as N]daily maximum≤ 21.7 mg/LJan–Mar
Nitrogen, ammonia total [as N]daily maximum≤ 119.6 mg/LApr–Jun
Flow, in conduit or thru treatment plantmaximum monthly average≤ .6 MGDall year
Solids, total dissolveddaily maximum≤ 1200 mg/Lall year

How strict are these limits?

Cited limits by parameter: Utah's rules and the federal ones.

Same industry: the 7 Chemicals and Allied Products permits in Utah.

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/UT0025305 · MCP: https://passage-data.com/mcp