Passage Data · Check a report · Use it from your AI

Asarco Llc - Ray Operations

Copper Ores, major discharger, Kearny, Arizona. NPDES permit AZ0000035 expired Feb 21, 2026; its limits still apply. Last 12 months: no values over a limit, 26 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 30 days after each period: outfall 010 form A monthly (13 values), outfall 012 form A monthly (13 values), outfall 010 form Y yearly, outfall 012 form Y yearly
Last report on file
June 2026
Oct 2024 – Sep 2025
1 value over a limit, 0 required values missing, 0 of 26 reports late

Limits in force (42)

ParameterStatisticLimitMonthsOutfall
Oxygen, dissolved [DO]daily maximumreport only (mg/L)all year010
pHminimumreport only (SU)all year010
pHmaximumreport only (SU)all year010
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year010
Arsenic, total recoverabledaily maximumreport only (ug/L)all year010
Selenium, total recoverabledaily maximum≤ 2 ug/Lall year010
Zinc, total recoverabledaily maximumreport only (ug/L)all year010
Cadmium, total recoverabledaily maximumreport only (ug/L)all year010
Lead, total recoverabledaily maximumreport only (ug/L)all year010
Chromium, total recoverabledaily maximumreport only (ug/L)all year010
Copper, total recoverabledaily maximum≤ 29 ug/Lall year010
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year010
Mercury, total recoverabledaily maximumreport only (ug/L)all year010
Pass/Fail Static 96Hr Acute Ceriodaphnia Dubiamonthly medianreport only (pass=0;fail=1)all year010
Pass/Fail Static 96 Hr Acute Pimephales Promelasmonthly medianreport only (pass=0;fail=1)all year010
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)monthly medianreport only (tox chronic)all year010
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)daily maximumreport only (tox chronic)all year010
TU Static Renewal 7-Day Chronic Ceriodaphnia dubiamonthly medianreport only (tox chronic)all year010
TU Static Renewal 7-Day Chronic Ceriodaphnia dubiadaily maximumreport only (tox chronic)all year010
TU Static Renewal 7-Day Chronic Pimphales promelasmonthly medianreport only (tox chronic)all year010
TU Static Renewal 7-Day Chronic Pimphales promelasdaily maximumreport only (tox chronic)all year010
Oxygen, dissolved [DO]daily maximumreport only (mg/L)all year012
pHminimumreport only (SU)all year012
pHmaximumreport only (SU)all year012
Hardness, total [as CaCO3]daily maximumreport only (mg/L)all year012
Arsenic, total recoverabledaily maximumreport only (ug/L)all year012
Selenium, total recoverabledaily maximumreport only (ug/L)all year012
Zinc, total recoverabledaily maximumreport only (ug/L)all year012
Cadmium, total recoverabledaily maximumreport only (ug/L)all year012
Lead, total recoverabledaily maximumreport only (ug/L)all year012
Chromium, total recoverabledaily maximumreport only (ug/L)all year012
Copper, total recoverabledaily maximumreport only (ug/L)all year012
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year012
Mercury, total recoverabledaily maximumreport only (ug/L)all year012
Pass/Fail Static 48Hr Acute Ceriodaphnia dubiamonthly medianreport only (pass=0;fail=1)all year012
Pass/Fail Static 96 Hr Acute Pimephales Promelasmonthly medianreport only (pass=0;fail=1)all year012
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)monthly medianreport only (tox chronic)all year012
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)daily maximumreport only (tox chronic)all year012
Static 7Day Chronic Pimephales Promelasmonthly medianreport only (tox chronic)all year012
Static 7Day Chronic Pimephales Promelasdaily maximumreport only (tox chronic)all year012
TU Static Renewal 7-Day Chronic Ceriodaphnia dubiamonthly medianreport only (tox chronic)all year012
TU Static Renewal 7-Day Chronic Ceriodaphnia dubiadaily maximumreport only (tox chronic)all year012

How strict are these limits?

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

Same industry: the 8 Metal Mining permits in Arizona.

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

· Save this facility as a site · Superfund sites nearby · Your permits on one board

On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/AZ0000035 · MCP: https://passage-data.com/mcp