Transalta Centralia Generation LLC

NPDES permit WA0001546 · Major NON-POTW · effective, expires 2027-01-31 · EPA's file as of 2026-09-19

Check this month's numbers before you file

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

0values over a limit
0required values missing, on 0 form(s)
4of 44 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 (78)

OutfallParameterStatisticLimitMonths
001Temperature, water deg. centigradeDAILY MX <= 17.5 deg C all year
001TurbidityDAILY MX report only (alert) all year
001TurbidityMO AVG report only (alert) all year
001Oxygen, dissolved [DO]MINIMUM >= 8 mg/L all year
001pHMAXIMUM <= 9 SU all year
001pHMINIMUM >= 6 SU all year
001Solids, total suspendedDAILY MX <= 100 mg/L all year
001Solids, total suspendedMO AVG <= 30 mg/L all year
001Chromium, hexavalent [as Cr]DAILY MX <= 18.1 ug/L all year
001Chromium, hexavalent [as Cr]MO AVG <= 10.4 ug/L all year
001Chromium, total [as Cr]DAILY MX <= .2 mg/L all year
001Chromium, total [as Cr]MO AVG <= .2 mg/L all year
001Copper, total [as Cu]DAILY MX <= 13 ug/L all year
001Copper, total [as Cu]MO AVG <= 8.9 ug/L all year
001Zinc, total [as Zn]DAILY MX <= 1 mg/L all year
001Zinc, total [as Zn]MO AVG <= 1 mg/L all year
001Selenium, total [as Se]DAILY MX <= 8.2 ug/L all year
001Selenium, total [as Se]MO AVG <= 5.6 ug/L all year
001Chlorine, total residualDAILY MX <= 50 ug/L all year
001Chlorine, total residualMO AVG <= 50 ug/L all year
001Chlorine, free availableDAILY MX <= .5 mg/L all year
001Chlorine, free availableMO AVG <= .2 mg/L all year
001Turbidity, backgroundDAILY MX report only (alert) all year
001Turbidity, backgroundMO AVG report only (alert) all year
001Mercury, total [as Hg]DAILY MX <= 20 ng/L all year
001Mercury, total [as Hg]MO AVG <= 10 ng/L all year
001FlowDAILY MX <= 12.12 MGD all year
001FlowMO AVG <= 6.36 MGD all year
001Oil and grease visualMAXIMUM <= 0 N=0;Y=1 all year
002BOD, 5-day, 20 deg. CMO AVG <= 30 mg/L all year
002BOD, 5-day, 20 deg. CWKLY AVG <= 45 mg/L all year
002BOD, 5-day, 20 deg. CMO AVG <= 9 lb/d all year
002BOD, 5-day, 20 deg. CWKLY AVG <= 13.5 lb/d all year
002pHMAXIMUM <= 9 SU all year
002pHMINIMUM >= 6 SU all year
002Solids, total suspendedMO AVG <= 30 mg/L all year
002Solids, total suspendedWKLY AVG <= 45 mg/L all year
002Solids, total suspendedMO AVG <= 9 lb/d all year
002Solids, total suspendedWKLY AVG <= 13.5 lb/d all year
002Chlorine, total residualDAILY MX <= 1 mg/L all year
002Chlorine, total residualMO AVG <= 1 mg/L all year
002Coliform, fecal generalMO AVG <= 200 #/100mL all year
002Coliform, fecal generalWKLY AVG <= 400 #/100mL all year
002FlowDAILY MX report only (alert) all year
002FlowMO AVG report only (alert) all year
FGDNitrogen, nitrate total [as N]DAILY MX <= 4 mg/L all year
FGDNitrogen, nitrate total [as N]MO AVG <= 3 mg/L all year
FGDArsenic, total [as As]DAILY MX <= 18 ug/L all year
FGDArsenic, total [as As]MO AVG <= 8 ug/L all year
FGDSelenium, total [as Se]DAILY MX <= 70 ug/L all year
FGDSelenium, total [as Se]MO AVG <= 29 ug/L all year
FGDMercury, total [as Hg]DAILY MX <= 103 ng/L all year
FGDMercury, total [as Hg]MO AVG <= 34 ng/L all year
FGDFlowDAILY MX report only (alert) all year
FGDFlowMO AVG report only (alert) all year
P3EpHMAXIMUM <= 9 SU all year
P3EpHMINIMUM >= 6 SU all year
P3ESolids, total suspendedDAILY MX <= 100 mg/L all year
P3ESolids, total suspendedMO AVG <= 30 mg/L all year
P3EChromium, hexavalent [as Cr]DAILY MX <= 18.1 ug/L all year
P3EChromium, hexavalent [as Cr]MO AVG <= 10.4 ug/L all year
P3EChromium, total [as Cr]DAILY MX <= .2 mg/L all year
P3EChromium, total [as Cr]MO AVG <= .2 mg/L all year
P3ECopper, total [as Cu]DAILY MX <= 13 ug/L all year
P3ECopper, total [as Cu]MO AVG <= 8.9 ug/L all year
P3EZinc, total [as Zn]DAILY MX <= 1 mg/L all year
P3EZinc, total [as Zn]MO AVG <= 1 mg/L all year
P3ESelenium, total [as Se]DAILY MX <= 8.2 ug/L all year
P3ESelenium, total [as Se]MO AVG <= 5.6 ug/L all year
P3EChlorine, total residualDAILY MX <= 50 ug/L all year
P3EChlorine, total residualMO AVG <= 50 ug/L all year
P3EChlorine, free availableDAILY MX <= .5 mg/L all year
P3EChlorine, free availableMO AVG <= .2 mg/L all year
P3EMercury, total [as Hg]DAILY MX <= 20 ng/L all year
P3EMercury, total [as Hg]MO AVG <= 10 ng/L all year
P3EFlowDAILY MX <= 12.12 MGD all year
P3EFlowMO AVG <= 6.36 MGD all year
P3EOil and grease visualMAXIMUM <= 0 N=0;Y=1 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