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Gma Garnet (USA) Corp

Ferroalloy Ores, Except Vanadium, Coos Bay, Oregon. NPDES permit OR0033812, in force until Feb 28, 2030. 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 (34 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 14 reports late

Limits in force (34)

ParameterStatisticLimitMonths
Temperature, water deg. centigrademonthly averagereport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Temperature, water deg. centigrademaximum 7-day averagereport only (deg C)all year
pHdaily minimum≥ 5.9 SUall year
pHdaily maximumreport only (SU)all year
Solids, total suspendedmonthly average≤ 30 mg/Lall year
Solids, total suspendeddaily maximum≤ 60 mg/Lall year
Solids, total suspendedmonthly average≤ 250 lb/dall year
Solids, total suspendeddaily maximum≤ 380 lb/dall year
Chromium, total [as Cr]monthly averagereport only (mg/L)all year
Chromium, total [as Cr]daily maximumreport only (mg/L)all year
Chromium, total [as Cr]monthly average≤ 2.5 lb/dall year
Chromium, total [as Cr]daily maximum≤ 4.5 lb/dall year
Copper, dissolved [as Cu]monthly averagereport only (mg/L)all year
Copper, dissolved [as Cu]daily maximumreport only (mg/L)all year
Copper, total [as Cu]monthly average≤ .022 mg/Lall year
Copper, total [as Cu]daily maximum≤ .042 mg/Lall year
Iron, total [as Fe]monthly average≤ 7.6 mg/Lall year
Iron, total [as Fe]daily maximum≤ 13 mg/Lall year
Iron, total [as Fe]monthly average≤ 12 lb/dall year
Iron, total [as Fe]daily maximum≤ 21 lb/dall year
Manganese, total [as Mn]monthly averagereport only (mg/L)all year
Manganese, total [as Mn]daily maximumreport only (mg/L)all year
Manganese, total [as Mn]monthly average≤ 13 lb/dall year
Manganese, total [as Mn]daily maximum≤ 25 lb/dall year
Nickel, total [as Ni]monthly averagereport only (mg/L)all year
Nickel, total [as Ni]daily maximumreport only (mg/L)all year
Nickel, total [as Ni]monthly average≤ 1.9 lb/dall year
Nickel, total [as Ni]daily maximum≤ 3.2 lb/dall 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 averagereport only (mg/L)all year
Chlorine, total residualdaily maximumreport only (mg/L)all year
Mercury, total recoverablequarterly maximumreport only (ug/L)all year

How strict are these limits?

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OR0033812 · MCP: https://passage-data.com/mcp