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Myrtle Creek, City of

Sewage treatment plant, Myrtle Creek, Oregon. NPDES permit OR0028665 expired Sep 30, 2008; 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: form A monthly (49 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 2 of 12 reports late

Limits in force (60)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Temperature, water deg. centigradeweekly averagereport only (deg C)all year
Temperature, water deg. centigradeweekly averagereport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Flow ratemonthly averagereport only (cfs)May–Oct
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 10 mg/LMay–Oct
BOD, 5-day, 20 deg. Cmonthly average≤ 320 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 80 lb/dMay–Oct
BOD, 5-day, 20 deg. Cdaily maximum≤ 1000 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cdaily maximum≤ 160 lb/dMay–Oct
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cweekly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 15 mg/LMay–Oct
BOD, 5-day, 20 deg. Cweekly average≤ 580 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 120 lb/dMay–Oct
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 8.5 SUall year
pHdaily minimumreport only (SU)all year
pHdaily maximumreport only (SU)all year
Solids, total suspendedmonthly average≤ 20 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly average≤ 10 mg/LMay–Oct
Solids, total suspendedmonthly average≤ 420 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly average≤ 80 lb/dMay–Oct
Solids, total suspendeddaily maximum≤ 1200 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendeddaily maximum≤ 160 lb/dMay–Oct
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedweekly average≤ 15 mg/LMay–Oct
Solids, total suspendedweekly average≤ 690 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedweekly average≤ 120 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 5.8 mg/LMay–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 11.6 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 10.8 mg/LMay–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 21.6 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 20.9 mg/LMay–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 42 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 28.3 mg/LMay–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 56.7 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 31.3 mg/LMay–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 62.8 mg/LMay–Oct
Nitrogen, ammonia total [as N]monthly average≤ 33.1 mg/LMay–Oct
Nitrogen, ammonia total [as N]daily maximum≤ 66.5 mg/LMay–Oct
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)May–Oct
Nitrogen, Kjeldahl, total [as N]daily maximumreport only (mg/L)May–Oct
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)May–Oct
Nitrite + Nitrate total [as N]daily maximumreport only (mg/L)May–Oct
Phosphorus, total [as P]monthly averagereport only (mg/L)May–Oct
Phosphorus, total [as P]daily maximumreport only (mg/L)May–Oct
Ultraviolet light intensitymonthly averagereport only (mW/cm2)all year
Ultraviolet light intensitydaily maximumreport only (mW/cm2)all year
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
E. colimonthly geometric mean≤ 126 #/100mLall year
E. colidaily maximum≤ 406 #/100mLall year
E. colimonthly geometric mean≤ 126 #/100mLall year
E. colidaily maximumreport only (#/100mL)all year
Excess thermal loadweekly average≤ 71 mkcal/dayMay–Nov
Excess thermal loadweekly average≤ 87 mkcal/dayJan, Feb, Mar, Apr, Dec
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/OR0028665 · MCP: https://passage-data.com/mcp