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Roseburg Urban Sanitary Authority

Sewage treatment plant, major discharger, Roseburg, Oregon. NPDES permit OR0031356 expired Sep 30, 2010; its limits still apply. Last 12 months: over a limit 6 times (last April 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (37 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
5 values over a limit, 0 required values missing, 0 of 36 reports late

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

Period endingParameterReportedLimitOver by
November 2025Excess thermal load, weekly average77.5 mkcal/day≤ 32 mkcal/day142%
December 2025Excess thermal load, weekly average69.6 mkcal/day≤ 32 mkcal/day118%
January 2026Excess thermal load, weekly average37.1 mkcal/day≤ 32 mkcal/day16%
February 2026Excess thermal load, weekly average41.6 mkcal/day≤ 32 mkcal/day30%
March 2026Excess thermal load, weekly average43.9 mkcal/day≤ 32 mkcal/day37%
April 2026Excess thermal load, weekly average73.9 mkcal/day≤ 32 mkcal/day131%

Limits in force (75)

ParameterStatisticLimitMonthsOutfall
Temperature, water deg. centigrademonthly averagereport only (deg C)all year001
Temperature, water deg. centigradedaily maximumreport only (deg C)all year001
Temperature, water deg. centigradeweekly averagereport only (deg C)May–Oct001
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cmonthly average≤ 3800 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cdaily maximum≤ 7500 lb/dJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)Jan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LJan, Feb, Mar, Apr, Nov, Dec001
BOD, 5-day, 20 deg. Cweekly average≤ 5600 lb/dJan, Feb, Mar, Apr, Nov, Dec001
pHdaily minimum≥ 6.3 SUMay–Oct001
pHdaily minimum≥ 6.1 SUJan, Feb, Mar, Apr, Nov, Dec001
pHdaily maximum≤ 8.5 SUMay–Oct001
pHdaily maximum≤ 8.5 SUJan, Feb, Mar, Apr, Nov, Dec001
pHdaily minimumreport only (SU)May–Oct001
pHdaily maximumreport only (SU)May–Oct001
pHdaily minimumreport only (SU)May–Oct001
pHdaily maximumreport only (SU)May–Oct001
pHdaily minimumreport only (SU)all year001
pHdaily maximumreport only (SU)all year001
Solids, total suspendedmonthly average≤ 10 mg/LMay–Oct001
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedmonthly average≤ 660 lb/dMay–Oct001
Solids, total suspendedmonthly average≤ 3800 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedmonthly averagereport only (mg/L)all year001
Solids, total suspendeddaily maximum≤ 1300 lb/dMay–Oct001
Solids, total suspendeddaily maximum≤ 7500 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendeddaily maximumreport only (lb/d)May–Oct001
Solids, total suspendeddaily maximumreport only (lb/d)Jan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedweekly average≤ 15 mg/LMay–Oct001
Solids, total suspendedweekly average≤ 45 mg/LJan, Feb, Mar, Apr, Nov, Dec001
Solids, total suspendedweekly average≤ 990 lb/dMay–Oct001
Solids, total suspendedweekly average≤ 5600 lb/dJan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)May–Oct001
Nitrogen, ammonia total [as N]monthly average≤ 2.5 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec001
Nitrogen, ammonia total [as N]daily maximumreport only (mg/L)May–Oct001
Nitrogen, ammonia total [as N]daily maximum≤ 4 mg/LMay–Oct001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)May–Oct001
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)May–Oct001
Nitrogen, Kjeldahl, total [as N]monthly averagereport only (mg/L)May–Oct001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)May–Oct001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)May–Oct001
Nitrite + Nitrate total [as N]monthly averagereport only (mg/L)May–Oct001
Phosphorus, total [as P]monthly averagereport only (mg/L)May–Oct001
Phosphorus, total [as P]monthly averagereport only (mg/L)May–Oct001
Phosphorus, total [as P]monthly averagereport only (mg/L)May–Oct001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year001
Chlorine, total residualmonthly averagereport only (mg/L)all year001
Chlorine, total residualmonthly average≤ .1 mg/Lall year001
Chlorine, total residualdaily maximumreport only (mg/L)all year001
Chlorine, total residualdaily maximum≤ .1 mg/Lall year001
E. colimonthly geometric mean≤ 126 #/100mLall year001
E. colidaily maximum≤ 406 #/100mLall year001
E. colimonthly geometric mean≤ 126 #/100mLall year001
E. colidaily maximumreport only (#/100mL)all year001
Excess thermal loadweekly averagereport only (mkcal/day)May–Oct001
Excess thermal loadweekly average≤ 19 mkcal/dayMay–Oct001
Excess thermal loadweekly averagereport only (mkcal/day)Jan, Feb, Mar, Apr, Nov, Dec001
Excess thermal loadweekly average≤ 32 mkcal/dayJan, Feb, Mar, Apr, Nov, Dec001
Phosphorous, in total orthophosphatemonthly averagereport only (mg/L)May–Oct001
Phosphorous, in total orthophosphatemonthly averagereport only (mg/L)May–Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]monthly average≤ 660 lb/dMay–Oct001
BOD, carbonaceous [5 day, 20 C]monthly averagereport only (mg/L)May–Oct001
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 1300 lb/dMay–Oct001
BOD, carbonaceous [5 day, 20 C]daily maximumreport only (lb/d)May–Oct001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/LMay–Oct001
BOD, carbonaceous [5 day, 20 C]weekly average≤ 990 lb/dMay–Oct001
BOD, carbonaceous, percent removalmonthly average minimum≥ 85 %May–Oct001
BOD, 5-day, percent removalmonthly average minimum≥ 85 %Jan, Feb, Mar, Apr, Nov, Dec001
Solids, suspended percent removalmonthly average minimum≥ 85 %all year001
Chlorine usagemonthly averagereport only (lb/d)all year001
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year003
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year004

How strict are these limits?

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

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