Silver Opportunity Partners LLC — NPDES permit ID0000060: limits, due date and EPA's record

Silver Ores, Kellogg, Idaho. NPDES permit ID0000060 expired Sep 9, 1996; its limits still apply. Last 12 months: no values over a limit, 1 of 12 reports late. Source: EPA ECHO, Oct 22, 2026.

Limits in force (57)

Parameter	Statistic	Limit	Months
pH	minimum	≥ 6 SU	all year
pH	maximum	≤ 9.5 SU	all year
Solids, total suspended	30-day average	≤ 20 mg/L	all year
Solids, total suspended	daily maximum	≤ 31.6 mg/L	all year
Solids, total suspended	30-day average	≤ 467 lb/d	all year
Solids, total suspended	daily maximum	≤ 738 lb/d	all year
Oil and grease [soxhlet extr.] tot.	30-day average	report only (mg/L)	all year
Oil and grease [soxhlet extr.] tot.	daily maximum	report only (mg/L)	all year
Hardness, total [as CaCO3]	30-day average	report only (mg/L)	all year
Hardness, total [as CaCO3]	daily maximum	report only (mg/L)	all year
Arsenic, total [as As]	30-day average	≤ .286 mg/L	all year
Arsenic, total [as As]	daily maximum	≤ .602 mg/L	all year
Arsenic, total [as As]	30-day average	≤ 6.7 lb/d	all year
Arsenic, total [as As]	daily maximum	≤ 14.1 lb/d	all year
Cadmium, total [as Cd]	30-day average	≤ .051 mg/L	all year
Cadmium, total [as Cd]	daily maximum	≤ .106 mg/L	all year
Cadmium, total [as Cd]	30-day average	≤ 1.2 lb/d	all year
Cadmium, total [as Cd]	daily maximum	≤ 2.5 lb/d	all year
Copper, total [as Cu]	30-day average	≤ .192 mg/L	all year
Copper, total [as Cu]	daily maximum	≤ .387 mg/L	all year
Copper, total [as Cu]	30-day average	≤ 4.5 lb/d	all year
Copper, total [as Cu]	daily maximum	≤ 9 lb/d	all year
Iron, total [as Fe]	30-day average	≤ 1.115 mg/L	all year
Iron, total [as Fe]	daily maximum	≤ 2 mg/L	all year
Iron, total [as Fe]	30-day average	≤ 26 lb/d	all year
Iron, total [as Fe]	daily maximum	≤ 46.7 lb/d	all year
Lead, total [as Pb]	30-day average	≤ .274 mg/L	all year
Lead, total [as Pb]	daily maximum	≤ .55 mg/L	all year
Lead, total [as Pb]	30-day average	≤ 6.4 lb/d	all year
Lead, total [as Pb]	daily maximum	≤ 12.8 lb/d	all year
Manganese, total [as Mn]	30-day average	≤ .503 mg/L	all year
Manganese, total [as Mn]	daily maximum	≤ .886 mg/L	all year
Manganese, total [as Mn]	30-day average	≤ 11.7 lb/d	all year
Manganese, total [as Mn]	daily maximum	≤ 20.7 lb/d	all year
Nickel, total [as Ni]	30-day average	≤ .093 mg/L	all year
Nickel, total [as Ni]	daily maximum	≤ .149 mg/L	all year
Nickel, total [as Ni]	30-day average	≤ 2.2 lb/d	all year
Nickel, total [as Ni]	daily maximum	≤ 3.5 lb/d	all year
Silver, total [as Ag]	30-day average	≤ .025 mg/L	all year
Silver, total [as Ag]	daily maximum	≤ .048 mg/L	all year
Silver, total [as Ag]	30-day average	≤ .6 lb/d	all year
Silver, total [as Ag]	daily maximum	≤ 1.1 lb/d	all year
Zinc, total [as Zn]	30-day average	≤ .605 mg/L	all year
Zinc, total [as Zn]	daily maximum	≤ 1.227 mg/L	all year
Zinc, total [as Zn]	30-day average	≤ 14.1 lb/d	all year
Zinc, total [as Zn]	daily maximum	≤ 28.6 lb/d	all year
Antimony, total [as Sb]	30-day average	≤ .32 mg/L	all year
Antimony, total [as Sb]	daily maximum	≤ .681 mg/L	all year
Antimony, total [as Sb]	30-day average	≤ 7.5 lb/d	all year
Antimony, total [as Sb]	daily maximum	≤ 15.9 lb/d	all year
Flow, in conduit or thru treatment plant	daily maximum	≤ 2.8 MGD	all year
Mercury, total [as Hg]	30-day average	≤ .002 mg/L	all year
Mercury, total [as Hg]	daily maximum	≤ .0043 mg/L	all year
Mercury, total [as Hg]	30-day average	≤ .05 lb/d	all year
Mercury, total [as Hg]	daily maximum	≤ .1 lb/d	all year
Gold, total [as Au]	daily maximum	≤ .0001 mg/L	all year
Gold, total [as Au]	daily maximum	≤ .002 lb/d	all year

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/ID0000060 · MCP: https://passage-data.com/mcp