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Oak Lodge Water Services District

Sewage treatment plant, major discharger, Milwaukie, Oregon. NPDES permit OR0026140, in force until Mar 31, 2027. 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 (25 values), form G monthly (6 values)
Renewal application due
Oct 2, 2026 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
3 values over a limit, 0 required values missing, 0 of 37 reports late

Limits in force (44)

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 average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 2600 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cdaily maximum≤ 5200 lb/dJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)May–Oct
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)Jan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LJan, Feb, Mar, Apr, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 3900 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 average≤ 10 mg/LMay–Oct
Solids, total suspendedmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly average≤ 490 lb/dMay–Oct
Solids, total suspendedmonthly average≤ 2600 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendeddaily maximum≤ 980 lb/dMay–Oct
Solids, total suspendeddaily maximum≤ 5200 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly average≤ 45 mg/LJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedweekly average≤ 15 mg/LMay–Oct
Solids, total suspendedweekly average≤ 3900 lb/dJan, Feb, Mar, Apr, Nov, Dec
Solids, total suspendedweekly average≤ 740 lb/dMay–Oct
Nitrogen, ammonia total [as N]monthly maximumreport only (mg/L)all year
Durationmonthly maximumreport only (hr)Jan, Feb, Mar, Apr, Nov, Dec
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
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≤ 47 mkcal/dayJun–Sep
BOD, carbonaceous [5 day, 20 C]monthly average≤ 10 mg/LMay–Oct
BOD, carbonaceous [5 day, 20 C]monthly average≤ 490 lb/dMay–Oct
BOD, carbonaceous [5 day, 20 C]daily maximum≤ 980 lb/dMay–Oct
BOD, carbonaceous [5 day, 20 C]weekly average≤ 15 mg/LMay–Oct
BOD, carbonaceous [5 day, 20 C]weekly average≤ 740 lb/dMay–Oct
BOD, carbonaceous, percent removalmonthly average minimum≥ 85 %May–Oct
BOD, 5-day, percent removalmonthly average minimum≥ 85 %Jan, Feb, Mar, Apr, Nov, Dec
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/OR0026140 · MCP: https://passage-data.com/mcp