COLUMBIA GORGE ALUMINUM COMPANY

NPDES permit WA0000540 · Minor NON-POTW · expired, expires 2013-04-30 · 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 2013-04-30 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 48 forms filed late

Last period with anything received: 2026-08-31.

Reporting

Reports are due about 15 days after each monitoring period ends (read off this permit's own late-day counts in EPA's filings).

Limits in force (52)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. fahrenheitMO AVG report only (alert) all year
001Temperature, water deg. fahrenheitMO AVG report only (alert) all year
001Solids, total suspendedDAILY MX <= 411 lb/d all year
001Solids, total suspendedDAILY MX <= 411 lb/d all year
001Solids, total suspendedMO AVG <= 103 lb/d all year
001Solids, total suspendedMO AVG <= 103 lb/d all year
001Oil and grease, hexane extr methodSingle Rdg report only (alert) all year
001Oil and grease, hexane extr methodSingle Rdg report only (alert) all year
001Fluoride, total [as F]DAILY MX <= 350 lb/d all year
001Fluoride, total [as F]DAILY MX <= 350 lb/d all year
001Fluoride, total [as F]MO AVG <= 160 lb/d all year
001Fluoride, total [as F]MO AVG <= 160 lb/d all year
001Aluminum, total [as Al]DAILY MX <= 40 lb/d all year
001Aluminum, total [as Al]DAILY MX <= 40 lb/d all year
001Aluminum, total [as Al]MO AVG <= 18 lb/d all year
001Aluminum, total [as Al]MO AVG <= 18 lb/d all year
001pH, maximumSingle Rdg report only (alert) all year
001pH, maximumSingle Rdg report only (alert) all year
001pH, minimumSingle Rdg report only (alert) all year
001pH, minimumSingle Rdg report only (alert) all year
001FlowDAILY MX report only (alert) all year
001FlowDAILY MX report only (alert) all year
001FlowMO AVG report only (alert) all year
001FlowMO AVG report only (alert) all year
001BSolids, total suspendedMO AVG <= 30 mg/L all year
001BSolids, total suspendedMO AVG <= 30 mg/L all year
001BSolids, total suspendedWKLY AVG <= 45 mg/L all year
001BSolids, total suspendedWKLY AVG <= 45 mg/L all year
001BChlorine, total residualMAXIMUM <= 2.5 mg/L all year
001BChlorine, total residualMAXIMUM <= 2.5 mg/L all year
001BChlorine, total residualMINIMUM >= .1 mg/L all year
001BChlorine, total residualMINIMUM >= .1 mg/L all year
001BBOD, percent removal [total]MO AV MN >= 85 % all year
001BBOD, percent removal [total]MO AV MN >= 85 % all year
001BpH, maximumSingle Rdg report only (alert) all year
001BpH, maximumSingle Rdg report only (alert) all year
001BpH, minimumSingle Rdg report only (alert) all year
001BpH, minimumSingle Rdg report only (alert) all year
001BColiform, fecal generalMO AVG <= 200 #/100mL all year
001BColiform, fecal generalMO AVG <= 200 #/100mL all year
001BColiform, fecal generalWKLY AVG <= 400 #/100mL all year
001BColiform, fecal generalWKLY AVG <= 400 #/100mL all year
001BFlowDAILY MX report only (alert) all year
001BFlowDAILY MX report only (alert) all year
001BFlowMO AVG report only (alert) all year
001BFlowMO AVG report only (alert) all year
001BSolids, suspended percent removalMO AV MN >= 85 % all year
001BSolids, suspended percent removalMO AV MN >= 85 % all year
ANODTotal production - massMO AVG report only (alert) all year
ANODTotal production - massMO AVG report only (alert) all year
DCPTTotal production - massMO AVG report only (alert) all year
DCPTTotal production - massMO AVG report only (alert) 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