Asarco Llc - Ray Operations

NPDES permit AZ0000035 · Major NON-POTW · expired, expires 2026-02-21 · EPA's file as of 2026-09-19

Check this month's numbers before you file
Watch this permit — $79 a month. Every Monday, from EPA's newest files: the next report due and when, whether EPA's file holds your last one, any change to this permit's limits or status, and the renewal date.

This permit expired on 2026-02-21 and is expired: its last limits keep applying until a new permit is issued, and EPA still expects the reports.

EPA's record, 2025-09-01 to 2026-08-31

0values over a limit
0required values missing, on 0 form(s)
0of 22 forms filed late

Last period with anything received: 2026-06-30.

Reporting

Reports are due about 28 days after each monitoring period ends (the most common figure among AZ permits in EPA's filings — check your permit).

Limits in force (42)

OutfallParameterStatisticLimitMonths
010Oxygen, dissolved [DO]DAILY MX report only all year
010pHMINIMUM report only all year
010pHMAXIMUM report only all year
010Hardness, total [as CaCO3]DAILY MX report only all year
010Arsenic, total recoverableDAILY MX report only all year
010Selenium, total recoverableDAILY MX <= 2 ug/L all year
010Zinc, total recoverableDAILY MX report only all year
010Cadmium, total recoverableDAILY MX report only all year
010Lead, total recoverableDAILY MX report only all year
010Chromium, total recoverableDAILY MX report only all year
010Copper, total recoverableDAILY MX <= 29 ug/L all year
010Flow, in conduit or thru treatment plantDAILY MX report only all year
010Mercury, total recoverableDAILY MX report only all year
010Pass/Fail Static 96Hr Acute Ceriodaphnia DubiaMO MED report only all year
010Pass/Fail Static 96 Hr Acute Pimephales PromelasMO MED report only all year
010TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)MO MED report only all year
010TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)DAILY MX report only all year
010TU Static Renewal 7-Day Chronic Ceriodaphnia dubiaMO MED report only all year
010TU Static Renewal 7-Day Chronic Ceriodaphnia dubiaDAILY MX report only all year
010TU Static Renewal 7-Day Chronic Pimphales promelasMO MED report only all year
010TU Static Renewal 7-Day Chronic Pimphales promelasDAILY MX report only all year
012Oxygen, dissolved [DO]DAILY MX report only all year
012pHMINIMUM report only all year
012pHMAXIMUM report only all year
012Hardness, total [as CaCO3]DAILY MX report only all year
012Arsenic, total recoverableDAILY MX report only all year
012Selenium, total recoverableDAILY MX report only all year
012Zinc, total recoverableDAILY MX report only all year
012Cadmium, total recoverableDAILY MX report only all year
012Lead, total recoverableDAILY MX report only all year
012Chromium, total recoverableDAILY MX report only all year
012Copper, total recoverableDAILY MX report only all year
012Flow, in conduit or thru treatment plantDAILY MX report only all year
012Mercury, total recoverableDAILY MX report only all year
012Pass/Fail Static 48Hr Acute Ceriodaphnia dubiaMO MED report only all year
012Pass/Fail Static 96 Hr Acute Pimephales PromelasMO MED report only all year
012TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)MO MED report only all year
012TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)DAILY MX report only all year
012Static 7Day Chronic Pimephales PromelasMO MED report only all year
012Static 7Day Chronic Pimephales PromelasDAILY MX report only all year
012TU Static Renewal 7-Day Chronic Ceriodaphnia dubiaMO MED report only all year
012TU Static Renewal 7-Day Chronic Ceriodaphnia dubiaDAILY MX report only all year

Built from EPA's ECHO bulk files. EPA's file, not the permit document, is the source: read your permit. Check a report before you file it · All states