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Portland, City of

Sewage treatment plant, major discharger, Portland, Oregon. NPDES permit OR0026891, in force until Apr 30, 2029. Last 12 months: over a limit once (last June 2026), 1 of 32 reports late. Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (33 values), form G monthly (6 values), form RW quarterly (8 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 1 required value missing, 0 of 24 reports late

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

Period endingParameterReportedLimitOver by
June 2026E. coli, daily maximum490 #/100mL≤ 406 #/100mL21%

Limits in force (63)

ParameterStatisticLimitMonths
Temperature, water deg. centigrademonthly averagereport only (deg C)all year
Temperature, water deg. centigradedaily maximumreport only (deg C)all year
Temperature, water deg. centigrademaximum 7-day averagereport only (deg C)all year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/LMay–Oct
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 1400 lb/dMay–Oct
BOD, 5-day, 20 deg. Cmonthly average≤ 3100 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cdaily maximum≤ 2800 lb/dMay–Oct
BOD, 5-day, 20 deg. Cdaily maximum≤ 6100 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/LMay–Oct
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 1400 lb/dMay–Oct
BOD, 5-day, 20 deg. Cmonthly average≤ 3100 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)May–Oct
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)Jan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 30 mg/LMay–Oct
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 2100 lb/dMay–Oct
BOD, 5-day, 20 deg. Cweekly average≤ 4600 lb/dJan, Feb, Mar, Apr, Nov, Dec
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
pHmonthly minimumreport only (SU)all year
pHmonthly maximumreport only (SU)all year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedmonthly average≤ 20 mg/LMay–Oct
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly average≤ 1400 lb/dMay–Oct
Solids, total suspendedmonthly average≤ 3100 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendeddaily maximum≤ 2800 lb/dMay–Oct
Solids, total suspendeddaily maximum≤ 6100 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly average≤ 20 mg/LMay–Oct
Solids, total suspendedmonthly average≤ 3100 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly average≤ 1400 lb/dMay–Oct
Solids, total suspendeddaily maximumreport only (lb/d)Jan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendeddaily maximumreport only (lb/d)May–Oct
Solids, total suspendedweekly average≤ 45 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedweekly average≤ 30 mg/LMay–Oct
Solids, total suspendedweekly average≤ 4600 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedweekly average≤ 2100 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly maximumreport only (mg/L)all year
Cyanide, free [as free]quarterly maximumreport only (ug/L)all year
Cyanide, total [as CN]quarterly maximumreport only (ug/L)all year
Hardness, total [as CaCO3]quarterly maximumreport only (mg/L)all year
Lead, dissolved [as Pb]quarterly maximumreport only (ug/L)all year
Lead, total [as Pb]quarterly maximumreport only (ug/L)all year
Zinc, dissolved [as Zn]quarterly maximumreport only (ug/L)all year
Zinc, total [as Zn]quarterly maximumreport only (ug/L)all year
2,4,6-Trichlorophenolquarterly maximumreport only (ug/L)all 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
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≤ .61 mg/Lall year
Chlorine, total residualdaily maximum≤ 1.41 mg/Lall 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 loadmaximum 7-day average≤ 74 mkcal/dayJun–Sep
BOD, 5-day, percent removalmonthly average minimum≥ 85 %all year
Solids, suspended percent removalmonthly average minimum≥ 85 %all year

New limits from Jun 1, 2028

ParameterNew limitNew or tighterMedian, last 12 months× new limit
Chlorine, total residual, daily maximum0.42 mg/Ltighter0.75 mg/L (12 values)1.79×
Chlorine, total residual, monthly average0.16 mg/Ltighter0.465 mg/L (12 values)2.91×

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/OR0026891 · MCP: https://passage-data.com/mcp