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Independence, City of

Sewage treatment plant, Independence, Oregon. NPDES permit OR0020443, in force until Aug 31, 2027. Last 12 months: over a limit 6 times (last March 2026). Source: EPA ECHO, Oct 22, 2026.

Reports due
About 15 days after each period: form A monthly (1 value), form G monthly (6 values), form LG monthly (2 values)
Renewal application due
Mar 4, 2027 · 180 days before expiry; your permit may set another date
Last report on file
September 2026
Oct 2024 – Sep 2025
0 values over a limit, 0 required values missing, 5 of 36 reports late

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

Period endingParameterReportedLimitOver by
December 2025BOD, 5-day, percent removal, monthly average minimum78.59 %≥ 85 %43%
January 2026Solids, suspended percent removal, monthly average minimum56.06 %≥ 65 %26%
February 2026BOD, 5-day, 20 deg. C, monthly average36.85 mg/L≤ 30 mg/L23%
February 2026BOD, 5-day, 20 deg. C, weekly average76.9 mg/L≤ 45 mg/L71%
February 2026BOD, 5-day, percent removal, monthly average minimum67.98 %≥ 85 %113%
March 2026BOD, 5-day, percent removal, monthly average minimum82.41 %≥ 85 %17%

Limits in force (38)

ParameterStatisticLimitMonths
Temperature, water deg. centigrademonthly averagereport only (deg C)Jan, Feb, Mar, Apr, May, Nov, Dec
Temperature, water deg. centigradedaily maximumreport only (deg C)Jan, Feb, Mar, Apr, May, Nov, Dec
Temperature, water deg. centigrademaximum 7-day averagereport only (deg C)Jan, Feb, Mar, Apr, May, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 30 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly average≤ 500 lb/dJan, Feb, Mar, Apr, May, Nov, Dec
BOD, 5-day, 20 deg. Cdaily maximum≤ 1000 lb/dJan, Feb, Mar, Apr, May, Nov, Dec
BOD, 5-day, 20 deg. Cmonthly averagereport only (mg/L)all year
BOD, 5-day, 20 deg. Cweekly average≤ 45 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
BOD, 5-day, 20 deg. Cweekly average≤ 750 lb/dJan, Feb, Mar, Apr, May, Nov, Dec
pHdaily minimum≥ 6.1 SUJan, Feb, Mar, Apr, May, Nov, Dec
pHdaily maximum≤ 9 SUJan, Feb, Mar, Apr, May, Nov, Dec
pHmonthly minimumreport only (SU)all year
pHmonthly maximumreport only (SU)all year
Alkalinity, total [as CaCO3]monthly maximumreport only (mg/L)Jan, Feb, Mar, Apr, May, Nov, Dec
Solids, total suspendedmonthly average≤ 50 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
Solids, total suspendedmonthly average≤ 830 lb/dJan, Feb, Mar, Apr, May, Nov, Dec
Solids, total suspendeddaily maximum≤ 1700 lb/dJan, Feb, Mar, Apr, May, Nov, Dec
Solids, total suspendedmonthly averagereport only (mg/L)all year
Solids, total suspendedweekly average≤ 80 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
Solids, total suspendedweekly average≤ 1200 lb/dJan, Feb, Mar, Apr, May, Nov, Dec
Nitrogen, ammonia total [as N]monthly maximumreport only (mg/L)Jan, Feb, Mar, Apr, May, Nov, Dec
Flow, in conduit or thru treatment plantmonthly averagereport only (MGD)Jan, Feb, Mar, Apr, May, Nov, Dec
Flow, in conduit or thru treatment plantdaily maximumreport only (MGD)Jan, Feb, Mar, Apr, May, Nov, Dec
Flow, in conduit or thru treatment plantdaily maximum≤ 0 MGDJun–Oct
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≤ .03 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
Chlorine, total residualdaily maximum≤ .11 mg/LJan, Feb, Mar, Apr, May, Nov, Dec
E. colimonthly geometric mean≤ 126 #/100mLJan, Feb, Mar, Apr, May, Nov, Dec
E. colidaily maximum≤ 406 #/100mLJan, Feb, Mar, Apr, May, Nov, Dec
E. colimonthly geometric mean≤ 126 #/100mLJan, Feb, Mar, Apr, May, Nov, Dec
E. colidaily maximumreport only (#/100mL)Jan, Feb, Mar, Apr, May, Nov, Dec
BOD, 5-day, percent removalmonthly average minimum≥ 85 %Jan, Feb, Mar, Apr, May, Nov, Dec
Solids, suspended percent removalmonthly average minimum≥ 65 %Jan, Feb, Mar, Apr, May, Nov, Dec
Chlorine usagemonthly averagereport only (lb/d)Jan, Feb, Mar, Apr, May, Nov, Dec
Chlorine usagedaily maximumreport only (lb/d)Jan, Feb, Mar, Apr, May, Nov, Dec
Lagoon freeboardmonthly minimumreport only (ft)all year
Lagoon freeboardmonthly maximumreport only (ft)all year

How strict are these limits?

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

Check this month's numbers Email me before each report is due

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On EPA ECHO: Facility report · DMR history

Your permit document is the final word. As JSON: /api/v1/permits/OR0020443 · MCP: https://passage-data.com/mcp