BH Mining Company LLC — NPDES permit CO0043168: limits, due date and EPA's record

Gold Ores, Central City, Colorado. NPDES permit CO0043168 expired Jun 30, 2022; its limits still apply. Last 12 months: no values over a limit, 1 of 23 reports late. Source: EPA ECHO, Oct 22, 2026.

Limits in force (80)

Parameter	Statistic	Limit	Months	Outfall
pH	minimum	≥ 6.5 SU	all year	001
pH	maximum	≤ 9 SU	all year	001
Solids, total suspended	30-day average	≤ 20 mg/L	all year	001
Solids, total suspended	daily maximum	≤ 30 mg/L	all year	001
Arsenic, total recoverable	30-day average	report only (ug/L)	all year	001
Iron, total recoverable	30-day average	≤ 5400 ug/L	all year	001
Iron, total recoverable	30-day average	≤ 19.5 lb/d	all year	001
Cadmium, total [as Cd]	30-day average	≤ 50 ug/L	all year	001
Cadmium, total [as Cd]	daily maximum	≤ 100 ug/L	all year	001
Copper, total [as Cu]	30-day average	≤ 150 ug/L	all year	001
Copper, total [as Cu]	daily maximum	≤ 300 ug/L	all year	001
Lead, total [as Pb]	30-day average	≤ 300 ug/L	all year	001
Lead, total [as Pb]	daily maximum	≤ 600 ug/L	all year	001
Manganese, dissolved [as Mn]	30-day average	≤ 2618 ug/L	all year	001
Manganese, dissolved [as Mn]	daily maximum	≤ 4738 ug/L	all year	001
Manganese, dissolved [as Mn]	30-day average	≤ 6.38 lb/d	all year	001
Zinc, total [as Zn]	30-day average	≤ 750 ug/L	all year	001
Zinc, total [as Zn]	daily maximum	≤ 1500 ug/L	all year	001
Zinc, potentially dissolved	30-day average	≤ 740 ug/L	all year	001
Zinc, potentially dissolved	daily maximum	≤ 564 ug/L	all year	001
Zinc, potentially dissolved	30-day average	≤ 2.67 lb/d	all year	001
Silver, potentially dissolved	30-day average	report only (ug/L)	all year	001
Silver, potentially dissolved	daily maximum	report only (ug/L)	all year	001
Copper, potentially dissolved	30-day average	≤ 64 ug/L	all year	001
Copper, potentially dissolved	daily maximum	≤ 50 ug/L	all year	001
Arsenic, potentially dissolved	daily maximum	report only (ug/L)	all year	001
Cadmium, potentially dissolvd	30-day average	≤ 4.7 ug/L	all year	001
Cadmium, potentially dissolvd	30-day average	≤ 1.2 ug/L	all year	001
Cadmium, potentially dissolvd	daily maximum	≤ 5.7 ug/L	all year	001
Cadmium, potentially dissolvd	daily maximum	≤ 5.7 ug/L	all year	001
Cadmium, potentially dissolvd	30-day average	≤ .008 lb/d	all year	001
Cadmium, potentially dissolvd	30-day average	≤ .008 lb/d	all year	001
Chromium, trivalent, potentially dissolvd	30-day average	report only (ug/L)	all year	001
Chromium, trivalent, potentially dissolvd	daily maximum	report only (ug/L)	all year	001
Lead, potentially dissolvd	30-day average	≤ 11 ug/L	all year	001
Lead, potentially dissolvd	daily maximum	≤ 281 ug/L	all year	001
Nickel, potentially dissolvd	30-day average	report only (ug/L)	all year	001
Nickel, potentially dissolvd	daily maximum	report only (ug/L)	all year	001
Selenium, potentially dissolvd	30-day average	report only (ug/L)	all year	001
Selenium, potentially dissolvd	daily maximum	report only (ug/L)	all year	001
Oil and grease	instantaneous maximum	≤ 10 mg/L	all year	001
Flow, in conduit or thru treatment plant	30-day average	≤ .432 MGD	all year	001
Flow, in conduit or thru treatment plant	daily maximum	report only (MGD)	all year	001
Mercury, total low level	30-day average	report only (ug/L)	all year	001
Sulfide-hydrogen sulfide [undissociated]	30-day average	≤ .002 mg/L	all year	001
Mercury, total [as Hg]	30-day average	≤ 1 ug/L	all year	001
Mercury, total [as Hg]	daily maximum	≤ 2 ug/L	all year	001
Oil and grease visual	instantaneous maximum	report only (abst=0;prst=1)	all year	001
Static Renewal 7 Day Chronic Ceriodaphnia dubia	single sample	report only (tox chronic)	all year	001
Static Renewal 7 Day Chronic Ceriodaphnia dubia	minimum value	report only (tox chronic)	all year	001
Static Renewal 7 Day Chronic Ceriodaphnia dubia	minimum value	≥ 100 tox chronic	all year	001
Static Renewal 7 Day Chronic Pimephales promelas	single sample	report only (tox chronic)	all year	001
Static Renewal 7 Day Chronic Pimephales promelas	minimum value	report only (tox chronic)	all year	001
Static Renewal 7 Day Chronic Pimephales promelas	minimum value	≥ 100 tox chronic	all year	001
pH	minimum	≥ 6 SU	all year	002
pH	maximum	≤ 9 SU	all year	002
Solids, total suspended	30-day average	≤ 20 mg/L	all year	002
Solids, total suspended	daily maximum	≤ 30 mg/L	all year	002
Cadmium, total [as Cd]	30-day average	≤ 50 ug/L	all year	002
Cadmium, total [as Cd]	daily maximum	≤ 100 ug/L	all year	002
Copper, total [as Cu]	30-day average	≤ 150 ug/L	all year	002
Copper, total [as Cu]	daily maximum	≤ 300 ug/L	all year	002
Lead, total [as Pb]	30-day average	≤ 300 ug/L	all year	002
Lead, total [as Pb]	daily maximum	≤ 600 ug/L	all year	002
Zinc, total [as Zn]	30-day average	≤ 750 ug/L	all year	002
Zinc, total [as Zn]	daily maximum	≤ 1500 ug/L	all year	002
Mercury, total [as Hg]	30-day average	≤ 1 ug/L	all year	002
Mercury, total [as Hg]	daily maximum	≤ 2 ug/L	all year	002
Arsenic, total recoverable	30-day average	report only (ug/L)	all year	003
Iron, total recoverable	30-day average	report only (ug/L)	all year	003
Zinc, potentially dissolved	30-day average	report only (ug/L)	all year	003
Silver, potentially dissolved	30-day average	report only (ug/L)	all year	003
Copper, potentially dissolved	30-day average	report only (ug/L)	all year	003
Cadmium, potentially dissolvd	30-day average	report only (ug/L)	all year	003
Chromium, trivalent, potentially dissolvd	30-day average	report only (ug/L)	all year	003
Lead, potentially dissolvd	30-day average	report only (ug/L)	all year	003
Manganese, potentially dissolvd	30-day average	report only (ug/L)	all year	003
Nickel, potentially dissolvd	30-day average	report only (ug/L)	all year	003
Flow, in conduit or thru treatment plant	30-day average	report only (MGD)	all year	003
Mercury, total [as Hg]	30-day average	report only (ug/L)	all year	003

How strict are these limits?

Your permit document is the final word. As JSON: /api/v1/permits/CO0043168 · MCP: https://passage-data.com/mcp