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MT. Angel, City of

Sewage treatment plant, Mount Angel, Oregon. NPDES permit OR0028762 expired Dec 31, 2009; 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 (6 values)
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 3 required values missing, 14 of 24 reports late

Limits in force (39)

ParameterStatisticLimitMonths
Flow ratedaily maximum≤ .3 MGDJan, Feb, Mar, Apr, Nov, Dec
Flow ratedaily maximum≤ .68 MGDJan, Feb, Mar, Apr, Nov, Dec
Flow ratedaily maximum≤ 1.1 MGDJan, Feb, Mar, Apr, Nov, Dec
Flow ratedaily maximum≤ 1.5 MGDJan, Feb, Mar, Apr, Nov, Dec
Flow ratemonthly averagereport only (cfs)Jan, Feb, Mar, Apr, Nov, Dec
Flow ratedaily maximumreport only (cfs)Jan, Feb, Mar, Apr, Nov, Dec
Flow ratedaily maximum≤ 1.9 MGDJan, Feb, Mar, Apr, Nov, Dec
Flow ratedaily maximum≤ 2.28 MGDJan, Feb, Mar, Apr, Nov, Dec
Flow ratedaily maximum≤ 2.76 MGDJan, Feb, Mar, Apr, Nov, Dec
Flow ratedaily maximum≤ 3.24 MGDJan, Feb, Mar, Apr, Nov, Dec
Flow ratedaily maximum≤ 3.72 MGDJan, Feb, Mar, Apr, Nov, Dec
Flow ratedaily maximum≤ 4.2 MGDJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 20 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 300 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cdaily maximum≤ 600 lb/dJan, Feb, Mar, Apr, Nov, Dec
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≤ 450 lb/dJan, Feb, Mar, Apr, Nov, Dec
pHdaily minimum≥ 6 SUJan, Feb, Mar, Apr, Nov, Dec
pHdaily maximum≤ 9 SUJan, Feb, Mar, Apr, Nov, Dec
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≤ 300 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendeddaily maximum≤ 600 lb/dJan, Feb, Mar, Apr, Nov, Dec
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≤ 450 lb/dJan, Feb, Mar, Apr, Nov, Dec
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)all year
Chlorine, total residualmonthly average≤ .13 mg/LJan, Feb, Mar, Apr, Nov, Dec
Chlorine, total residualdaily maximum≤ .34 mg/LJan, Feb, Mar, Apr, Nov, Dec
E. colimonthly geometric mean≤ 126 #/100mLJan, Feb, Mar, Apr, Nov, Dec
E. colidaily maximum≤ 406 #/100mLJan, Feb, Mar, Apr, Nov, Dec
E. colimonthly geometric mean≤ 126 #/100mLJan, Feb, Mar, Apr, Nov, Dec
E. colidaily maximumreport only (#/100mL)Jan, Feb, Mar, Apr, Nov, Dec
Flow, totaldaily maximum≤ 0 galMay–Oct
BOD, 5-day, percent removalmonthly average minimum≥ 85 %Jan, Feb, Mar, Apr, Nov, Dec
Solids, suspended percent removalmonthly average minimum≥ 85 %Jan, Feb, Mar, Apr, Nov, Dec
Chlorine usagemonthly averagereport only (lb/d)Jan, Feb, Mar, Apr, Nov, Dec

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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