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Confederated Tribes of Warm Springs

Sewage treatment plant, Warm Springs, Oregon. NPDES permit OR0034100 expired Nov 30, 2012; its limits still apply. Last 12 months: no values over a limit, 243 required values missing. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 10 days after each period: form A1 quarterly (27 values)
Last report on file
None
Oct 2024 – Sep 2025
0 values over a limit, 81 required values missing, 7 of 12 reports late

Limits in force (35)

ParameterStatisticLimitMonths
Temperature, water deg. centigrademonthly averagereport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/LApr–Oct
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan, Feb, Mar, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/LApr–Oct
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LJan, Feb, Mar, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 9.5 lb/dApr–Oct
BOD, 5-day, 20 deg. Cmonthly average≤ 29 lb/dJan, Feb, Mar, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 14 lb/dApr–Oct
BOD, 5-day, 20 deg. Cweekly average≤ 43 lb/dJan, Feb, Mar, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
pHinstantaneous minimum≥ 6.5 SUall year
pHinstantaneous maximum≤ 8.5 SUall year
Solids, total suspendedmonthly average≤ 10 mg/LApr–Oct
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Nov, Dec
Solids, total suspendedweekly average≤ 15 mg/LApr–Oct
Solids, total suspendedweekly average≤ 45 mg/LJan, Feb, Mar, Nov, Dec
Solids, total suspendedmonthly average≤ 9.5 lb/dApr–Oct
Solids, total suspendedmonthly average≤ 29 lb/dJan, Feb, Mar, Nov, Dec
Solids, total suspendedweekly average≤ 14 lb/dApr–Oct
Solids, total suspendedweekly average≤ 43 lb/dJan, Feb, Mar, Nov, Dec
Solids, total suspendedmonthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)all year
E. coli, MTEC-MFmonthly geometric mean≤ 126 #/100mLall year
E. coli, MTEC-MFinstantaneous maximum≤ 406 #/100mLall year
Floating solids, waste or visible foam-visualmonthly maximum≤ 0 N=0;Y=1all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)all year
Chlorine, total residualmonthly average≤ 50 ug/Lall year
Chlorine, total residualweekly average≤ 50 ug/Lall year
Chlorine, total residualmonthly average≤ .048 lb/dall year
Chlorine, total residualweekly average≤ .048 lb/dall year
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year

How strict are these limits?

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

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OR0034100 · MCP: https://passage-data.com/mcp