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Hydro Extrusion USA, LLC

Primary Aluminum, major discharger, The Dalles, Oregon. NPDES permit OR0001708 expired Jul 31, 2026; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (16 values), form I monthly (5 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 4 required values missing, 3 of 36 reports late

Limits in force (21)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Temperature, water deg. centigrademonthly averagereport only (deg C)all year
Temperature, water deg. centigrademaximum daily averagereport only (deg C)all year
Temperature, water deg. centigradeinstantaneous maximum≤ 34.6 deg Call year
Thermal Dischargemonthly average≤ 770 mkcal/dayJul–Oct
pHmonthly minimumreport only (SU)all year
pHmonthly maximumreport only (SU)all year
Oil & Greasemonthly average≤ 10 mg/Lall year
Oil & Greasedaily maximum≤ 15 mg/Lall year
Aluminum, total [as Al]monthly average≤ 2.4 mg/Lall year
Aluminum, total [as Al]daily maximum≤ 6.9 mg/Lall year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmonthly average≤ .05 mg/Lall year
Chlorine, total residualdaily maximum≤ .1 mg/Lall year
pH, maximumdaily maximum≤ 8.5 SU (alert, not enforceable)all year
pH, minimumdaily minimum≥ 6 SU (alert, not enforceable)all year
pH range excursions, > 60 minutestotal≤ 0 occur/moall year
pH range excursions, monthly total accumtotal≤ 446 minall year

How strict are these limits?

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

Same industry: the 6 Primary Metal Industries permits in Oregon.

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/OR0001708 · MCP: https://passage-data.com/mcp