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Confed Tribes of Warm Springs

Sewage treatment plant, Warm Springs, Oregon. NPDES permit OR0032638 expired Jun 30, 2026; its limits still apply. Last 12 months: over a limit 24 times (last March 2026), 300 required values missing, 6 of 10 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 20 days after each period: form A monthly (30 values)
Last report on file
March 2026
Oct 2024 – Sep 2025
6 values over a limit, 60 required values missing, 9 of 12 reports late

Last 12 months (Oct 1, 2025 – Sep 30, 2026)

All 24 values over a limit
Period endingParameterReportedLimitOver by
October 2025Nitrogen, ammonia total [as N], daily maximum11≤ 6.8 mg/L62%
October 2025Nitrogen, ammonia total [as N], daily maximum11≤ 6.8 mg/L62%
October 2025Nitrogen, ammonia total [as N], monthly average3.03≤ 2.4 mg/L26%
October 2025Nitrogen, ammonia total [as N], monthly average3.03≤ 2.4 mg/L26%
October 2025Solids, total suspended, weekly average17≤ 15 mg/L13%
October 2025Solids, total suspended, weekly average17≤ 15 mg/L13%
December 2025Nitrogen, ammonia total [as N], daily maximum7.5≤ 6.8 mg/L10%
December 2025Nitrogen, ammonia total [as N], daily maximum7.5≤ 6.8 mg/L10%
December 2025Nitrogen, ammonia total [as N], monthly average4.23≤ 2.4 mg/L76%
December 2025Nitrogen, ammonia total [as N], monthly average4.23≤ 2.4 mg/L76%
January 2026Nitrogen, ammonia total [as N], daily maximum9.8≤ 6.8 mg/L44%
January 2026Nitrogen, ammonia total [as N], daily maximum9.8≤ 6.8 mg/L44%
January 2026Nitrogen, ammonia total [as N], monthly average8.73≤ 2.4 mg/L264%
January 2026Nitrogen, ammonia total [as N], monthly average8.73≤ 2.4 mg/L264%
February 2026E. coli, MTEC-MF, instantaneous maximum2400≤ 406 CFU/100mL491%
February 2026E. coli, MTEC-MF, instantaneous maximum2400≤ 406 CFU/100mL491%
February 2026Nitrogen, ammonia total [as N], daily maximum13≤ 6.8 mg/L91%
February 2026Nitrogen, ammonia total [as N], daily maximum13≤ 6.8 mg/L91%
February 2026Nitrogen, ammonia total [as N], monthly average9.48≤ 2.4 mg/L295%
February 2026Nitrogen, ammonia total [as N], monthly average9.48≤ 2.4 mg/L295%
March 2026Nitrogen, ammonia total [as N], daily maximum9≤ 6.8 mg/L32%
March 2026Nitrogen, ammonia total [as N], daily maximum9≤ 6.8 mg/L32%
March 2026Nitrogen, ammonia total [as N], monthly average7.58≤ 2.4 mg/L216%
March 2026Nitrogen, ammonia total [as N], monthly average7.58≤ 2.4 mg/L216%

Limits in force (46)

ParameterStatisticLimitMonths
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≤ 73 lb/dApr–Oct
BOD, 5-day, 20 deg. Cmonthly average≤ 218 lb/dJan, Feb, Mar, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 109 lb/dApr–Oct
BOD, 5-day, 20 deg. Cweekly average≤ 327 lb/dJan, Feb, Mar, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)Apr–Oct
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)Jan, Feb, Mar, Nov, Dec
BOD, 5-day, 20 deg. Cweekly averagereport only (mg/L)Apr–Oct
BOD, 5-day, 20 deg. Cweekly averagereport only (mg/L)Jan, Feb, Mar, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)Apr–Oct
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)Jan, Feb, Mar, Nov, Dec
BOD, 5-day, 20 deg. Cweekly averagereport only (lb/d)Apr–Oct
BOD, 5-day, 20 deg. Cweekly averagereport only (lb/d)Jan, Feb, Mar, Nov, Dec
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≤ 73 lb/dApr–Oct
Solids, total suspendedmonthly average≤ 218 lb/dJan, Feb, Mar, Nov, Dec
Solids, total suspendedweekly average≤ 109 lb/dApr–Oct
Solids, total suspendedweekly average≤ 327 lb/dJan, Feb, Mar, Nov, Dec
Solids, total suspendedmonthly averagereport only (mg/L)Apr–Oct
Solids, total suspendedmonthly averagereport only (mg/L)Jan, Feb, Mar, Nov, Dec
Solids, total suspendedweekly averagereport only (mg/L)Apr–Oct
Solids, total suspendedweekly averagereport only (mg/L)Jan, Feb, Mar, Nov, Dec
Solids, total suspendedmonthly averagereport only (lb/d)Apr–Oct
Solids, total suspendedmonthly averagereport only (lb/d)Jan, Feb, Mar, Nov, Dec
Solids, total suspendedweekly averagereport only (lb/d)Apr–Oct
Solids, total suspendedweekly averagereport only (lb/d)Jan, Feb, Mar, Nov, Dec
Nitrogen, ammonia total [as N]monthly average≤ 2.4 mg/Lall year
Nitrogen, ammonia total [as N]daily maximum≤ 6.8 mg/Lall year
Nitrogen, ammonia total [as N]monthly average≤ 17.4 lb/dall year
Nitrogen, ammonia total [as N]instantaneous maximum≤ 49.3 lb/dall year
E. coli, MTEC-MFmonthly average≤ 126 CFU/100mLall year
E. coli, MTEC-MFinstantaneous maximum≤ 406 CFU/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
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/OR0032638 · MCP: https://passage-data.com/mcp