TransAlta Centralia Mining LLC

NPDES permit WA0040215 · Minor NON-POTW · administratively continued, expires 2025-09-30 · 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 2025-09-30 and is administratively continued: 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 24 forms filed late

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

Reporting

Reports are due about 15 days after each monitoring period ends (the most common figure among WA permits in EPA's filings — check your permit).

Limits in force (64)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeDAILY MX report only (alert) all year
001Temperature, water deg. centigradeDAILY MX report only (alert) all year
001Temperature, water deg. centigradeMO AVG report only (alert) all year
001Temperature, water deg. centigradeMO AVG report only (alert) all year
001TurbidityDAILY MX report only (alert) all year
001TurbidityDAILY MX report only (alert) all year
001TurbidityMO AVG report only (alert) all year
001TurbidityMO AVG report only (alert) all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Oil and grease [soxhlet extr.] tot.MO AVG <= 15 mg/L all year
001Oil and grease [soxhlet extr.] tot.MO AVG <= 15 mg/L all year
001Arsenic, total [as As]MO AVG <= 2.2 ug/L all year
001Arsenic, total [as As]MO AVG <= 2.2 ug/L all year
001Chromium, hexavalent [as Cr]MO AVG <= 9.8 ug/L all year
001Chromium, hexavalent [as Cr]MO AVG <= 9.8 ug/L all year
001Iron, total [as Fe]MO AVG <= 958 ug/L all year
001Iron, total [as Fe]MO AVG <= 958 ug/L all year
001Selenium, total [as Se]MO AVG <= 4.7 ug/L all year
001Selenium, total [as Se]MO AVG <= 4.7 ug/L all year
001pH, maximumDAILY MX <= 8.5 SU all year
001pH, maximumDAILY MX <= 8.5 SU all year
001pH, minimumDAILY MN >= 6.5 SU all year
001pH, minimumDAILY MN >= 6.5 SU all year
001Mercury, total [as Hg]DAILY MX report only (alert) all year
001Mercury, total [as Hg]DAILY MX report only (alert) all year
001Mercury, total [as Hg]MO AVG report only (alert) all year
001Mercury, total [as Hg]MO AVG 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
LPLFSolids, total suspendedDAILY MX report only (alert) all year
LPLFSolids, total suspendedDAILY MX report only (alert) all year
LPLFSolids, total suspendedMO AVG report only (alert) all year
LPLFSolids, total suspendedMO AVG report only (alert) all year
LPLFArsenic, total [as As]DAILY MX report only (alert) all year
LPLFArsenic, total [as As]DAILY MX report only (alert) all year
LPLFArsenic, total [as As]MO AVG report only (alert) all year
LPLFArsenic, total [as As]MO AVG report only (alert) all year
LPLFChromium, hexavalent [as Cr]DAILY MX report only (alert) all year
LPLFChromium, hexavalent [as Cr]DAILY MX report only (alert) all year
LPLFChromium, hexavalent [as Cr]MO AVG report only (alert) all year
LPLFChromium, hexavalent [as Cr]MO AVG report only (alert) all year
LPLFIron, total [as Fe]DAILY MX report only (alert) all year
LPLFIron, total [as Fe]DAILY MX report only (alert) all year
LPLFIron, total [as Fe]MO AVG report only (alert) all year
LPLFIron, total [as Fe]MO AVG report only (alert) all year
LPLFSelenium, total [as Se]DAILY MX report only (alert) all year
LPLFSelenium, total [as Se]DAILY MX report only (alert) all year
LPLFSelenium, total [as Se]MO AVG report only (alert) all year
LPLFSelenium, total [as Se]MO AVG report only (alert) all year
LPLFpH, maximumMAXIMUM report only (alert) all year
LPLFpH, maximumMAXIMUM report only (alert) all year
LPLFpH, minimumMINIMUM report only (alert) all year
LPLFpH, minimumMINIMUM report only (alert) all year
LPLFMercury, total [as Hg]DAILY MX report only (alert) all year
LPLFMercury, total [as Hg]DAILY MX report only (alert) all year
LPLFMercury, total [as Hg]MO AVG report only (alert) all year
LPLFMercury, total [as Hg]MO AVG report only (alert) all year
LPLFFlowDAILY MX report only (alert) all year
LPLFFlowDAILY MX report only (alert) all year
LPLFFlowMO AVG report only (alert) all year
LPLFFlowMO 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