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Astoria, City of

Sewage treatment plant, major discharger, Astoria, Oregon. NPDES permit OR0027561 expired Oct 31, 2016; its limits still apply. Last 12 months: over a limit 2 times (last October 2025), 9 required values missing, 4 of 12 reports late. 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
3 values over a limit, 0 required values missing, 2 of 12 reports late

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

Period endingParameterReportedLimitOver by
October 2025BOD, 5-day, 20 deg. C, monthly average38.4 mg/L≤ 30 mg/L28%
October 2025Coliform, fecal general, monthly median21 #/100mL≤ 14 #/100mL50%

Limits in force (67)

ParameterStatisticLimitMonths
Temperature, water deg. centigradedaily maximumreport only (deg C)Aug
Temperature, water deg. centigradedaily maximumreport only (deg C)Aug
Temperature, water deg. centigradedaily maximumreport only (deg C)Aug
Temperature, water deg. fahrenheitweekly average≤ 77 deg Fall year
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cmonthly averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LMay–Oct
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, May, Oct, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 1100 lb/dMay–Oct
BOD, 5-day, 20 deg. Cmonthly average≤ 3200 lb/dJan, Feb, Mar, Apr, May, Oct, Nov, Dec
BOD, 5-day, 20 deg. Cdaily maximum≤ 2100 lb/dMay–Oct
BOD, 5-day, 20 deg. Cdaily maximum≤ 6300 lb/dJan, Feb, Mar, Apr, May, Oct, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, May, Oct, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 3200 lb/dJan, Feb, Mar, Apr, May, Oct, Nov, Dec
BOD, 5-day, 20 deg. Cdaily maximumreport only (lb/d)Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
BOD, 5-day, 20 deg. Cweekly averagereport only (lb/d)all year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LMay–Oct
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LJan, Feb, Mar, Apr, May, Oct, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 1600 lb/dMay–Oct
BOD, 5-day, 20 deg. Cweekly average≤ 4700 lb/dJan, Feb, Mar, Apr, May, Oct, Nov, Dec
pHdaily minimum≥ 6 SUall year
pHdaily maximum≤ 9 SUall year
pHdaily minimumreport only (SU)all year
pHdaily maximumreport only (SU)all year
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedmonthly averagereport only (lb/d)all year
Solids, total suspendedmonthly average≤ 50 mg/LMay–Oct
Solids, total suspendedmonthly average≤ 50 mg/LJan, Feb, Mar, Apr, May, Oct, Nov, Dec
Solids, total suspendedmonthly average≤ 1800 lb/dMay–Oct
Solids, total suspendedmonthly average≤ 5300 lb/dJan, Feb, Mar, Apr, May, Oct, Nov, Dec
Solids, total suspendeddaily maximum≤ 3500 lb/dMay–Oct
Solids, total suspendeddaily maximum≤ 10500 lb/dJan, Feb, Mar, Apr, May, Oct, Nov, Dec
Solids, total suspendedmonthly average≤ 50 mg/LJan, Feb, Mar, Apr, May, Oct, Nov, Dec
Solids, total suspendedmonthly average≤ 5300 lb/dJan, Feb, Mar, Apr, May, Oct, Nov, Dec
Solids, total suspendeddaily maximumreport only (lb/d)Jan, Feb, Mar, Apr, May, Oct, Nov, Dec
Solids, total suspendedweekly averagereport only (lb/d)all year
Solids, total suspendedweekly average≤ 75 mg/LMay–Oct
Solids, total suspendedweekly average≤ 75 mg/LJan, Feb, Mar, Apr, May, Oct, Nov, Dec
Solids, total suspendedweekly average≤ 2600 lb/dMay–Oct
Solids, total suspendedweekly average≤ 7900 lb/dJan, Feb, Mar, Apr, May, Oct, Nov, Dec
Nitrogen, ammonia total [as N]monthly averagereport only (mg/L)all year
Coliform, fecal - % samples exceeding limittotal≤ 10 %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≤ .1 mg/Lall year
Chlorine, total residualmonthly average≤ .04 mg/Lall year
Chlorine, total residualdaily maximum≤ .3 mg/Lall year
Chlorine, total residualdaily maximum≤ .11 mg/Lall year
E. colimonthly geometric mean≤ 126 #/100mLall year
E. colidaily maximum≤ 406 #/100mLall year
E. colimonthly geometric mean≤ 106 #/100mLall year
E. colidaily maximumreport only (#/100mL)all year
Excess thermal loadmonthly average≤ 2.563 MWJun–Oct
Excess thermal loaddaily maximum≤ 3.844 MWJun–Oct
Sodium Bisulfitemonthly averagereport only (mg/L)all year
Enterococcimonthly geometric meanreport only (#/100mL)all year
Enterococcimonthly geometric mean≤ 35 #/100mLall year
Coliform, fecal generalmonthly medianreport only (#/100mL)all year
Coliform, fecal generalmonthly median≤ 14 #/100mLall year
Coliform, fecal generaldaily maximumreport only (#/100mL)all year
BOD, 5-day, percent removalmonthly average minimum≥ 65 %May–Oct
BOD, 5-day, percent removalmonthly average minimum≥ 35 %Jan, Feb, Mar, Apr, Nov, Dec
Solids, suspended percent removalmonthly average minimum≥ 65 %May–Oct
Solids, suspended percent removalmonthly average minimum≥ 35 %Jan, Feb, Mar, Apr, Nov, Dec
Chlorine usagemonthly averagereport only (lb/d)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

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