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TransAlta Centralia Mining LLC

Electric Services, Centralia, Washington. NPDES permit WA0040215 expired Sep 30, 2025; its limits still apply. Last 12 months: no values over a limit. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: outfall 001 form MM monthly (16 values), outfall LPLF form MM monthly (16 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 0 of 24 reports late

Limits in force (64)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigradedaily maximumreport only (deg C) (alert, not enforceable)all year001
Temperature, water deg. centigradedaily maximumreport only (deg C) (alert, not enforceable)all year001
Temperature, water deg. centigrademonthly averagereport only (deg C) (alert, not enforceable)all year001
Temperature, water deg. centigrademonthly averagereport only (deg C) (alert, not enforceable)all year001
Turbiditydaily maximumreport only (NTU) (alert, not enforceable)all year001
Turbiditydaily maximumreport only (NTU) (alert, not enforceable)all year001
Turbiditymonthly averagereport only (NTU) (alert, not enforceable)all year001
Turbiditymonthly averagereport only (NTU) (alert, not enforceable)all year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Solids, total suspendedmonthly average≤ 30 mg/Lall year001
Oil and grease [soxhlet extr.] tot.monthly average≤ 15 mg/Lall year001
Oil and grease [soxhlet extr.] tot.monthly average≤ 15 mg/Lall year001
Arsenic, total [as As]monthly average≤ 2.2 ug/Lall year001
Arsenic, total [as As]monthly average≤ 2.2 ug/Lall year001
Chromium, hexavalent [as Cr]monthly average≤ 9.8 ug/Lall year001
Chromium, hexavalent [as Cr]monthly average≤ 9.8 ug/Lall year001
Iron, total [as Fe]monthly average≤ 958 ug/Lall year001
Iron, total [as Fe]monthly average≤ 958 ug/Lall year001
Selenium, total [as Se]monthly average≤ 4.7 ug/Lall year001
Selenium, total [as Se]monthly average≤ 4.7 ug/Lall year001
pH, maximumdaily maximum≤ 8.5 SUall year001
pH, maximumdaily maximum≤ 8.5 SUall year001
pH, minimumdaily minimum≥ 6.5 SUall year001
pH, minimumdaily minimum≥ 6.5 SUall year001
Mercury, total [as Hg]daily maximumreport only (ng/L) (alert, not enforceable)all year001
Mercury, total [as Hg]daily maximumreport only (ng/L) (alert, not enforceable)all year001
Mercury, total [as Hg]monthly averagereport only (ng/L) (alert, not enforceable)all year001
Mercury, total [as Hg]monthly averagereport only (ng/L) (alert, not enforceable)all year001
Flowdaily maximumreport only (MGD) (alert, not enforceable)all year001
Flowdaily maximumreport only (MGD) (alert, not enforceable)all year001
Flowmonthly averagereport only (MGD) (alert, not enforceable)all year001
Flowmonthly averagereport only (MGD) (alert, not enforceable)all year001
Solids, total suspendeddaily maximumreport only (mg/L) (alert, not enforceable)all yearLPLF
Solids, total suspendeddaily maximumreport only (mg/L) (alert, not enforceable)all yearLPLF
Solids, total suspendedmonthly averagereport only (mg/L) (alert, not enforceable)all yearLPLF
Solids, total suspendedmonthly averagereport only (mg/L) (alert, not enforceable)all yearLPLF
Arsenic, total [as As]daily maximumreport only (ug/L) (alert, not enforceable)all yearLPLF
Arsenic, total [as As]daily maximumreport only (ug/L) (alert, not enforceable)all yearLPLF
Arsenic, total [as As]monthly averagereport only (ug/L) (alert, not enforceable)all yearLPLF
Arsenic, total [as As]monthly averagereport only (ug/L) (alert, not enforceable)all yearLPLF
Chromium, hexavalent [as Cr]daily maximumreport only (ug/L) (alert, not enforceable)all yearLPLF
Chromium, hexavalent [as Cr]daily maximumreport only (ug/L) (alert, not enforceable)all yearLPLF
Chromium, hexavalent [as Cr]monthly averagereport only (ug/L) (alert, not enforceable)all yearLPLF
Chromium, hexavalent [as Cr]monthly averagereport only (ug/L) (alert, not enforceable)all yearLPLF
Iron, total [as Fe]daily maximumreport only (ug/L) (alert, not enforceable)all yearLPLF
Iron, total [as Fe]daily maximumreport only (ug/L) (alert, not enforceable)all yearLPLF
Iron, total [as Fe]monthly averagereport only (ug/L) (alert, not enforceable)all yearLPLF
Iron, total [as Fe]monthly averagereport only (ug/L) (alert, not enforceable)all yearLPLF
Selenium, total [as Se]daily maximumreport only (ug/L) (alert, not enforceable)all yearLPLF
Selenium, total [as Se]daily maximumreport only (ug/L) (alert, not enforceable)all yearLPLF
Selenium, total [as Se]monthly averagereport only (ug/L) (alert, not enforceable)all yearLPLF
Selenium, total [as Se]monthly averagereport only (ug/L) (alert, not enforceable)all yearLPLF
pH, maximummaximumreport only (SU) (alert, not enforceable)all yearLPLF
pH, maximummaximumreport only (SU) (alert, not enforceable)all yearLPLF
pH, minimumminimumreport only (SU) (alert, not enforceable)all yearLPLF
pH, minimumminimumreport only (SU) (alert, not enforceable)all yearLPLF
Mercury, total [as Hg]daily maximumreport only (ng/L) (alert, not enforceable)all yearLPLF
Mercury, total [as Hg]daily maximumreport only (ng/L) (alert, not enforceable)all yearLPLF
Mercury, total [as Hg]monthly averagereport only (ng/L) (alert, not enforceable)all yearLPLF
Mercury, total [as Hg]monthly averagereport only (ng/L) (alert, not enforceable)all yearLPLF
Flowdaily maximumreport only (gal/d) (alert, not enforceable)all yearLPLF
Flowdaily maximumreport only (gal/d) (alert, not enforceable)all yearLPLF
Flowmonthly averagereport only (gal/d) (alert, not enforceable)all yearLPLF
Flowmonthly averagereport only (gal/d) (alert, not enforceable)all yearLPLF

How strict are these limits?

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

Same industry: the 21 Electric Services permits in Washington.

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/WA0040215 · MCP: https://passage-data.com/mcp